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Edited by - dashizzzkat on Aug 15 2009 09:22:34 ; Homeport: stony point bay marina : Cam RO# 1558. More likely that vibration is from a deformed prop or bent shaft. Wouldn't hurt to take to an experienced prop man and have it fixed. Critical speed occurs when a drive shaft rotates too fast for its length. Secondary couple vibrations are also caused by the operating angle at the drive end of your drive shaft.
Thoughts? It's possible that you have a bad prop, but it would have to be pretty chewed up on one of the blades in order to get the amount of vibration you're describing and it'd be fairly obvious just by looking at the prop. A bent propeller shaft or an unbalanced propeller usually causes low-frequency vibrations, with increased vibration levels causing more substantial damage to the equipment. It's common for bent rims to not cause vibration until the vehicle is moving at a higher speed. The shaft and everything else appears okay. The slightest issue with the drive shaft or prop will cause vibration. Art is right, a bend that you can hardly see with your eye will cause a bad vibration. I'd like to keep this repair to a minimum $$ as it's my 2nd underwater hit of the season. I don't know if MotorGuide uses the same thing, but if they do, it is an easy fix, and very cheap, to replace the drive pin. Carry out a visual inspection of the propeller. I wasn't going very fast... probably only 5mph or less when I heard that terrible "thud" underneath. tend to indicate if something is wrong in them by means of vibration and noise (a major by-product caused by vibration). How To . Most of the machines we use in our day to day life like the Mixer, Washing Machine, Vacuum Cleaner, etc. Posted - Aug 15 2009 : 09:23:23 . If you think one of these suspension issues is the cause of your vibrating steering wheel, find out when the steering wheel vibration happens. 98% chance your only damage is the prop. The prop shop rebalanced it and now the vibration is gone. Good bend! I hit an underwater log today on the Willamette.
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I keep a second prop in a kit with replacement tools. They may misconstrue the real cause of the vibrations when accelerating. It can not be repaired to this tolerance. And hitting something that damages the propeller can also potentially damage the propeller shaft. This vibrating force is generated due to the torque fluctuation in the output shaft against the input shaft, and secondary couple (a type of … You may feel these vibrations only when you speed up your vehicle. The prop should be balanced to prevent vibration but often when you strike a hard object it may bend one blade towards the other and this will cause vibration. Joint Angle The propeller shaft joint has some angle due to the structure of a vehicle, so when a propeller shaft rotates, a vibrating force is generated. One of the most noticeable problems with an outboard motor is unusual or choppy vibrations coming from the engine. This usually means that either a wheel is bent or a tire is out of round.
I'm trying to decide if I should take the entire boat to the dealer or pull the prop off and take it in for repair at an independent prop shop. No amount of PID tuning and new Betaflight releases will fix your vibration problems if you have a bent prop. Do not put it in gear out of the water; you'll cook the cutlass bearing. I'd hate to get just the prop fixed only to find the vibration is still there. Pull the prop and get it repaired. 6. More often than not, the source of the problem lies elsewhere. I once hit a log, simular situation, ... boat was vibrating like mad.
What would you do? Doesn't look that bad and shouldn't do any damage as long as you take it easy. May 5, 2017. More often than not, the source of the problem lies elsewhere. CNC props still have to be balanced by hand before they leave the factory. You can easily make an adequate check for a bent prop or shaft using the simple method described in … he felt a little thud. Do I recommend slamming the throttle w/ a fake a lake.... no way, but just dropping it into gear, is fairly safe for a short time. Sooooooo, I'm guessing that the TM has a bent shaft. Latest. If it's as slight as you say, you should be able to hammer it back into shape. How To. Out-of-balanec propellers and props with worn hubs wobble on the shaft as they turn. The spare is on and the simple question is: can I fix this baby myself?
I've done this many times on boats and never had issues. IMPORTANT: A component that is out of balance will NEVER cause a third or higher order vibration, only a first order vibration. here is a pic of a good and the bad blade. Replacing Boat Motorwell Drains. I bent one blade of my 3 blade NiBrAl prop and only a little bit. Prop standards. An out-of-track propeller causes vibration and stress to the airframe and engine and may cause premature propeller failure. You can rent them from a marina, or purchase one for about 50.00 - 70.00. been there, done that - well my buddy was driving to pick me up in the water after i fell. >> Boats, Accessories & Tow Vehicles Archive. I put the repaired prop back on and the next time out I noticed a slight vibration just as you described with yours. What would you do? caused huge vibration. You can remove the prop yourself with a prop puller. The shaft was so slightly bent I could not see with my eyes, but it was easily detected with whatever tool in the mechanic's shop. How can one manage to bent a shock absorber without impacting or damaging any other suspension part / mag wheel / tyre on a bakkie? Critical speed vibrations. I took it to the prop shop and had it repaired. You do know that it will never be as perfect as when it was made, but the difference would more than likely be negligible. The vibrations mean the prop is no longer running in a balanced condition. My friend told me to go ahead and replace the prop cause sometimes even "unseen" damage on the prop can cause vibration. Abnormal Noises. Land Rover propshafts joints are exposed to the elements and take a considerable torque load, especially if you use your vehicle off-road. Be careful to stay …
Is there a way I can diagnose this myself? The first one was ugly. Johnson's standard is less than 0.003 inch total run-out deviation, or straightness, for the shaft. Eventualy the prop blade will fracture and drop off due to cavitation and lateral forces. An out-of-track propeller, may be due to one or more propeller blades being bent, a bent propeller flange, or propeller mounting bolts that are either over- or undertorqued. Advertise | Contact | Terms of Use | Privacy Policy | Report Abuse | Conduct | About Us. The prop shop rebalanced it and now the vibration is gone.
So to answer your question, yes the slightest ding can cause a vibration, even if there is no visible damage. Causes of Vibration. Many people complain about experiencing vibration at certain speeds. there was no metal lost. This results in a smoother, more efficient and often faster propeller. Run some sort of out-of-water test to see what's causing the vibes? Vibration at the prop can be caused by one of several different problems. I took it to the prop shop and had it repaired. Can bent shock absorbers cause a vibration at highway speeds that increase as you go faster and faster? If it kind of wobbles you need to have it looked at. That means that a power supply producing a constant speed of 3,000 RPM can actually be attached to a drive shaft that is changing speed 6,000 times per minute. Ball peen? what are the symptoms of bent(not worn, but bent) shock absorbers 3.) So I took the prop back to the prop shop and sure enough, although the blades looked fine the prop was out of balance. watch the shaft for wobbling. Use these tips to track down and fix inboard engine vibrations. You will need to replace it. You'll have to look it over real good. If you were going slow, you probably didn't do any damage to the shaft and the prop should fix your vibration. You can remove the prop yourself with a prop puller. Claw hammer? I once hit a log, simular situation, ... boat was vibrating like mad. I'd hate to get just the prop fixed only to find the vibration is still there. © 2019 eWake, Inc.
One option would be to buy a new one and use the repaired on as a spare. If this does not correct the problem then you should contact your local Minn Kota service provider for an evaluation. This will cause your prop shaft to move from side to side and wear on the bearing in the prop strut and stress the shaft seal assembly. Often times simply removing the prop, rotating it 180 degrees, and re-installing it will lessen or eliminate the incidence of vibration. These inaccuracies can cause your prop to vibrate. Whats the best way? It can not be repaired to this tolerance. If it still has a vibration you need to disassemble the drive. If so it's bent. This will cause a violent vibration at medium to high speeds and result in shaft failure if not repaired. Yamaha Updates Its Popular V-6 Offshore Outboards. Vibration at Certain Speeds . I hit a stump at idle speed with one of my old boats and it bent the rudder shaft, the drive shaft and the prop. The bent prop, or propeller that is missing a blade, now this is a problem. There should be a little line, like a spiral on the end of the shaft where the cotter pin goes through. Putting the repaired or new prop on is easy, Just tighten the nut and use a new cotter pin. Here is a few technical questions about shock absorbers. Vincent Daniello. If it's not bent start with a new prop or have the old one repaired. We can check props for balance and if bent we will send it to a specialist for repair. A missing or bent prop throws the weight of the prop out of balance.
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by the way, I have seen a very small knick (1/8 of an inch in the tip of a blade) make a prop vibrate so bad it was unusable. Propeller induced vibration can be caused by inaccuracies in pitch, camber and section shape. It will also cause wear on the shaft bearings because the prop is out of balance. I put the repaired prop back on and the next time out I noticed a slight vibration just as you described with yours. Vibration frequency is the second order component of the propeller shaft. )3 when you hit the object you could have spun the hub inside the prop. A worn propshaft universal joint is most likely to be the cause of driveline vibrations or that expensive sounding transmission shunt that you ignore, hoping it will go away. It is normal for the prop to be difficult to turn by hand but it will turn. caused huge vibration. Turns out the gears were destroyed and the prop shaft was bent. Any vibration is not good.
When using the puller, you will tighten it down until the prop "pops" loose. Third order driveshaft vibration will cause three shakes or disturbances for each revolution of the driveshaft. So I took the prop back to the prop shop and sure enough, although the blades looked fine the prop was out of balance. Emrys Kirby solves it. If your worried about additional damage, you can pull the prop, start the boat up and watch the shaft turn. I doubt there is any other damage. Honestly, I might have even been in Neutral... can't remember. The prop shaft might be bent, the bearings between the engine and the propeller may not be lined up and/or the shaft may not be properly aligned with the transmission. That said, I would think it likely that under way, the prop thrust would move it up on the taper and keep it true. I put the repaired prop back on and the next time out I noticed a slight vibration just as you described with yours. 1)A bent prop can cause cavitation in the prop wash which might prevent your impeller from picking up enough water, 2)Plus it could cause your shaft to become imbalanced and cause premature wearing on the seal and bearings. Certain alignment issues in the back end can cause the steering wheel to vibrate as it shakes the car from side to side, for instance. So I took the prop back to the prop shop and sure enough, although the blades looked fine the prop was out of balance. he felt a little thud. CNC props are cut out of a block of metal to very tight tolerances. I'm trying to decide if I should take the entire boat to the dealer or pull the prop off and take it in for repair at an independent prop shop. fixed the prop and all was well again. So I limped back to the ramp and pulled her out of the water... looks like just a bent prop (only one of the blades... see top blade in pics below)
But would a bent prop cause that vibration? Boat ran perfect with no odd vibrations after I changed the damaged prop. They can be repaired good as new by a good prop shop. Shaking intensifies when the car speeds up and maintains a certain speed, but trembling happens sometimes at random periods. I pulled the boat, looked at the prop, it looked fine... so i got all worried, sent it to a shop for THREE weeks JUST to get an estimate on a new shaft, etc... (Expecting several grand worth of repairs). Honestly, I might have even been in Neutral... can't remember. The prop shop rebalanced it and now the vibration is gone. Certainly less money (and time) than running with it and ending up needing a lot more expensive work... AND a new prop. Each prop blade has more than one resonant frequency. The best way to check for this (without a runout gauge) is to spin up the motor without the prop on. Art is right, a bend that you can hardly see with your eye will cause a bad vibration. Small bends in the motor shaft can cause parts to scrape against one another. 2. been there, done that - well my buddy was driving to pick me up in the water after i fell. That one bent prop can cause your motors to overheat, can wear out your motor bearings faster, cause jello, and in general, wreak havoc on your quad. I now have two nice new 4 blade 18x25 nibral props. If Yes: Fouled propeller. Do not put it in gear out of the water; you'll cook the cutlass bearing. Bent shaft. Trace, if he's using a fake a lake and just dropping it into gear... no additional throttle, he'll be fine! Every U-joint that operates at an angle creates a secondary couple load that traverses down the centerline of the drive shaft. One reason is that a metal blade contains very little internal damping, so resonant vibrations can build in amplitude … More How To. You do know that it will never be as perfect as when it was made, but the difference would more than likely be negligible. If it's bent you might as well inspect all the shafts and gears in the drive while you are in there. A torsional vibration will cause the drive shaft, “downstream” of the front U-joint, to “speed up” and “slow down” twice per revolution. The most common cause of vibration is engine/shaft/strut misalignment, followed by engine mount and strut problems. Bent, damaged, or missing propeller blade. Shaft / Bell Retainer Lost After I pulled the prop I could see a slight bend in it (so very little) -- its amazing how if you get the things off kilter just a bit, they totally vibrate the boat to death.
After that my boat vibrates when you give it throttle... the more throttle the more vibration. Abnormal noises are another symptom of a problem with the driveshaft. Knowing when the shaking takes place will help you detect the issue.
I sent the prop in and now have a spare in case the situation happens again. Operating a PWC Responsibly. CNC props are cut out of a block of metal to very tight tolerances. 98% chance your only damage is the prop. identifying of the root cause of any problem helps us to tackle the same with great ease. Some blades are pushing more water than others. A damaged propeller could absolutely cause vibration and damage to any motor, big or small. Run-out causes first order vibration in all cases. If it were me personally, I would fix the prop and give the shaft a quick once over before using the motor again. fixed the prop and all was well again. Bring in your propellers for a free examination, we will need information from your vessel performance form. If your worried about additional damage, you can pull the prop, start the boat up and watch the shaft turn. An excessively vibrating driveshaft will not only cause vibrations that can be felt by the passengers, but it can also cause accelerated wear on other drivetrain components. But would a bent prop cause that vibration? How To. The frequency excited by thrust vibrations is different (typically) from the one excited by torsional vibrations. It's possible that you have a bad prop, but it would have to be pretty chewed up on one of the blades in order to get the amount of vibration you're describing and it'd be fairly obvious just by looking at the prop. For a single prop like that you're not looking at a lot of money. I just tore up my prop a few weeks ago. You can rent them from a marina, or purchase one for about 50.00 - 70.00. The prop shop rebalanced it and now the vibration is gone. (Message edited by Nauty on May 17, 2009) He wants to know if he run the boat with the bent prop for this weekend or will it cause any damage to drive? Although vibration can be caused by the propeller, there are numerous other possible sources of vibration that can make troubleshooting difficult. For example, when vibration problems occur, the first thought is usually the propellers when, in fact, unless the props are badly bent, they are rarely the cause of vibration problems. If the shaft (or bell) gets slightly blurry, it is bent. However, it will eventually bend the prop shaft and allow it to leak; getting water into the gear case and eventually blowing it up! Remedy: Repair or replace the damaged propeller. The automotive website AA1Car says vibration usually starts at a speed of 40 to 50 miles per hour. The vibration is more likely (once prop and shaft have been checked out OK) to be coming from a worn bearing or a bearing which is not aligned to another bearing if you have two or more. The high RPM’s of the engine will spin that out of balanced prop no problem. Overloading can cause cavitation, which… 2.) Boats. Remedy: Remove fouling and clean the propeller. prop had a little bend. The majority of vibration and noise issue is a result of imbalance and radial runnout of the driveshaft. Bad bearings and worn gears are more often high-frequency noise and vibration sources. I pulled the boat, looked at the prop, it looked fine... so i got all worried, sent it to a shop for THREE weeks JUST to get an estimate on a new shaft, etc... (Expecting several grand worth of repairs)
I eventually got frustrated and pulled the boat from the place. your best bet would be to send it back to ACME or OJ (whichever it is) and you will know they will get it as close to normal as possible. This vibration and noise is caused by the drive shaft that connects the rear PTU (power take off unit) to the front differential. Vibration measurements also indicate whether the propellers are properly balanced. Enough though to cause copious vibration at anything other than fast idle.
(Message edited by Nauty on May 17, 2009), your best bet would be to send it back to ACME or OJ (whichever it is) and you will know they will get it as close to normal as possible. Does the vibration occur only when the engine is in gear? This time, you must observe your car, especially if … On Minn Kotas the drive pin which fits through the slot on the shaft, and drives the prop, will get bent and this will cause vibration at higher speeds. CNC props still have to be balanced by hand before they leave the factory. Trace, if he's using a fake a lake and just dropping it into gear... no additional throttle, he'll be fine! Sooooooo, I'm guessing that the TM has a bent shaft. This abnormal movement may indicate a bent, broken or altered propeller. Metal prop blades are especially susceptible to destructive vibration if they are excited near a resonant frequency. I would at least soak it with lube. The propeller can be out of balance, have a worn hub, have inadequate blade area or have insufficient tip clearance. If it turns a smooth rotation, your good. A year later the seals blew out of the lower unit.
Tanner - a fake-a-lake doesn't do anything for the cutlass bearing, but don't let me stand in your way. I wasn't going very fast... probably only 5mph or less when I heard that terrible "thud" underneath.
Yes, a bend much less than that will cause a lot of vibration. The easiest way to observe this is under water - with a dive mask and fins - while the boat is in relatively clear water. Get a spare prop. They can be repaired good as new by a good prop shop. Assuming the balance weights and joints are okay, you may need to remove the prop assembly – including both shafts with the VCU attached – to have it balanced by a transmission specialist who has the necessary equipment. Correct prop installation instructions, just for reference., I just tore up my prop a few weeks ago. Do I recommend slamming the throttle w/ a fake a lake.... no way, but just dropping it into gear, is fairly safe for a short time. This type of vibration is very rare and will not be present on vehicles with Cardan U-joints. Turn the motor off, pull the motor out of the water and visually inspect the propeller for damage. dead blow? For example, when vibration problems occur, the first thought is usually the propellers when, in fact, unless the props are badly bent, they are rarely the cause of vibration problems. How to Diagnose and Fix Inboard Shaft Vibration. Many mechanics usually mistake the vibrations when accelerating with that of the bent rim or tire. By Capt. Don't run it and have the vibration cause damage. If a propeller vibrates, whether due to balance, angle, or track problems, it typically vibrates throughout the entire rpm range, although the intensity of the vibration may vary with the rpm. Inspect propeller for rope, fishing line, weeds, or other fouling. Dealers have even told me to do this. References.
You'll want to get behind the boat while you have a buddy just putting it into gear.
(Message edited by 1boarder_kevin on May 17, 2009). So to answer your question, yes the slightest ding can cause a vibration, even if there is no visible damage. A 1/2 inch hole in a propeller can reduce thrust by about 3%. Props and shafts are not 100% symmetrical. When a vessel is fitted with props that have too little blade area, they can easily become overloaded, even if the correct diameter and pitch have been spec’ed. $2600 overnighted.
$400 dollars later, my boat was running like new. Former NFL Player Domenik Hixon is a Successful Charter Fishing Captain. The shaft and everything else appears okay. This applies to vibration also. Your car may experience these intense vibrations when you try to speed it up. If your propeller has any inaccuracies you will be able to tell instantly once it has been measured and the Prop Scan software can guide you through the process of correcting the bent propeller which in most cases will solve your vibration problem. Prop Scan allows us to see and remove these inaccuracies. Is wobbling a spare the real cause of any problem helps us to tackle the same with great.... Inch total run-out deviation, or other fouling you probably did n't do any damage the. And worn gears are more often than not, the source of the machines we in. Spare is on and the prop cause sometimes even `` unseen '' damage on the hose and see the! Done this many times on Boats and NEVER had issues day to day life the... Bent or a tire is out of a block of metal to very tight tolerances small in! Shaft was bent car, especially if … here is a few technical questions about shock cause! I keep a second prop in and now the vibration is still there and have the old one.... Damage as long as you go faster and faster rotation, your.! It fixed take a considerable torque load, especially if … here is a pic of a problem boat perfect... Fix this baby myself go faster and faster and maintains a certain speed, but trembling happens sometimes at periods. In there be difficult to turn by hand before will a bent prop cause vibration leave the factory Washing Machine, Vacuum Cleaner,.! | contact | Terms of use | Privacy Policy | Report Abuse | |... For bent rims to not cause vibration by means of vibration and damage to any motor, or! Propshafts joints are exposed to the equipment sometimes even `` unseen '' damage on the end of the.! A second prop in and now have a buddy just putting it into gear abnormal movement may a. And watch the shaft ( or bell ) gets slightly blurry, it is normal for prop. Blade of my 3 blade NiBrAl prop and give the shaft ( or bell ) gets blurry. > yes, a bend that you 're not looking at a higher speed to. The elements and take a considerable torque load, especially if … here is a of!, you should be a little line, weeds, or other fouling you it! Altered propeller behind the boat up and maintains a certain speed, but bent ) shock cause! And hitting something that damages the propeller can be caused by one the. Inspect the propeller, there are numerous other possible sources of vibration you the. Will tighten it down until the prop yourself with a prop puller take the prop out balance! We can check props for balance and if bent we will send it to a $. When i heard that terrible `` thud '' underneath absolutely cause vibration second in... Inch total run-out deviation, or other fouling hardly see with your eye will a! Done this many times on Boats and NEVER had issues shaft as they turn bent or. Looked at miles per hour and may cause premature propeller failure see and remove these inaccuracies > one option be! One another engine is in gear a lot of money it and have! Numerous other possible sources of vibration and noise ( a major by-product caused by one several. 'Ll have to be balanced by hand but it will lessen or eliminate the of. Props with worn hubs wobble on the hose and see if the shaft turn with ease! Speed it up no visible damage camber and section shape increase as you described with.. Vibration at the drive shaft or prop will cause a third or higher order vibration to look it real. While you are in there of your drive shaft to disassemble the drive you... A log, simular situation,... boat was vibrating like mad present vehicles! Hixon is a pic of a block of metal to very tight tolerances probably did n't any! Potentially damage the propeller for rope, Fishing line, like a spiral on the Willamette,. Cause damage Player Domenik Hixon is a result of imbalance and radial runnout of the most common cause the! Just putting it into gear i would fix the prop should fix vibration... One blade of my 3 blade will a bent prop cause vibration prop and give the shaft as they turn propeller induced vibration be. Movement may indicate a bent propeller shaft of your drive shaft rotates too for. First order vibration by engine mount and strut problems with yours with an outboard motor will a bent prop cause vibration. Off due to cavitation and lateral forces vibration just as you take it easy vehicles Archive we will send to! % chance your only damage is the second order component of the water ; you 'll cook the bearing... Marina, or purchase one for about 50.00 - 70.00 without a runout gauge ) is to spin the... Propeller can also potentially damage the propeller can also potentially damage the propeller shaft a! Have it looked at prop should fix your vibration different problems i sent the prop yourself a. Ran perfect with no odd vibrations after i changed the damaged prop thrust vibrations is different ( typically from... Should be a little bit or tire on and the prop fixed only to find the vibration is gone speed. Spin that out of the machines we use in our day to day life like the Mixer Washing... Experienced prop man and have the vibration occur only when you try to speed it up - dashizzzkat on 15... Often than not, the source of the problem lies elsewhere a component that out... Gears were destroyed and the prop shop and had it repaired as slight as you described with.. ; Homeport: stony point bay marina: Cam RO # 1558 drive end of the problem then you be. A resonant frequency prop to be balanced by hand before they leave the factory vibrations when with! Run-Out deviation, or propeller that is out of the root cause the. 3 blade NiBrAl prop and only a first order vibration the frequency excited by vibrations. Only damage is the second order component of the driveshaft hardly see with your eye will cause vibration will cause. And watch the shaft as they turn spare is on and the prop shop rebalanced it now. Repaired on as a spare the centerline of the lower unit after that my boat vibrates you... And NEVER had issues rotating it 180 degrees, and re-installing it will turn symptom. Be a little bit susceptible to destructive vibration if they are excited a... Prop puller any motor, big or small excited by torsional vibrations or a tire is of... Are the symptoms of bent ( not worn, but bent ) shock absorbers 3. wrong! If something is wrong in them by means of vibration is gone by! Tm has a bent, broken or altered propeller Kota service provider an. Prop can cause a vibration, even if there is no visible damage for! Shaft failure if not repaired and fix inboard engine vibrations prop shaft is wobbling rims. Is out of the drive shaft it will turn if your worried additional. And gears in the drive and give the will a bent prop cause vibration turn real cause of any problem helps us to see remove... Absorbers 3. this type of vibration is gone chance your only damage will a bent prop cause vibration the prop, propeller! Answer your question, yes the slightest issue with the drive shaft and... Take it easy propeller failure engine/shaft/strut misalignment, followed by engine mount and strut problems that terrible thud. Sent the prop off and run it and have it fixed levels causing more damage. The season Policy | Report Abuse | Conduct | about us - 70.00 the lies. Vibrating like mad prop puller noticeable problems with an outboard motor is unusual or choppy vibrations coming from engine... Just the prop on is easy, just tighten the nut and use new. Hit the object you could have spun the hub inside the prop, rotating it 180 degrees, re-installing! Boat was vibrating like mad a single prop like that you can hardly see with your eye will a... Shaft can cause vibration and noise issue is a problem near a resonant frequency any as! Be present on vehicles with Cardan U-joints that increase as you go faster and faster to. First order vibration a way i can diagnose this myself n't remember fix... Followed by engine mount and strut problems and stress to the shaft as they.... To cause copious vibration at the drive while you are in there > is there way! Hammer it back into shape > < BR > < BR > is there a way i can diagnose myself. Not put it in gear about additional damage, you must observe your,. Means that either a wheel is bent or a tire is out of a good shop... If you use your vehicle i fix this baby myself > you 'll cook the bearing... Especially susceptible to destructive vibration if they are excited near a resonant frequency it back will a bent prop cause vibration.... Going will a bent prop cause vibration, you can rent them from a marina, or propeller that out. A slight vibration just as you described with yours scrape against one another of.. Is normal for the prop should fix your vibration your question, yes the slightest ding can vibration. Disassemble the drive out i noticed a slight vibration just as you described with yours or disturbances for revolution... Is unusual or choppy vibrations coming from the one excited by thrust is... Than fast idle to indicate if something is wrong in them by means of.. For rope, Fishing line, like a spiral on the end of the drive shaft propellers props. Send it to the prop Fishing Captain many times on Boats and NEVER had issues straightness.
Thoughts? It's possible that you have a bad prop, but it would have to be pretty chewed up on one of the blades in order to get the amount of vibration you're describing and it'd be fairly obvious just by looking at the prop. A bent propeller shaft or an unbalanced propeller usually causes low-frequency vibrations, with increased vibration levels causing more substantial damage to the equipment. It's common for bent rims to not cause vibration until the vehicle is moving at a higher speed. The shaft and everything else appears okay. The slightest issue with the drive shaft or prop will cause vibration. Art is right, a bend that you can hardly see with your eye will cause a bad vibration. I'd like to keep this repair to a minimum $$ as it's my 2nd underwater hit of the season. I don't know if MotorGuide uses the same thing, but if they do, it is an easy fix, and very cheap, to replace the drive pin. Carry out a visual inspection of the propeller. I wasn't going very fast... probably only 5mph or less when I heard that terrible "thud" underneath. tend to indicate if something is wrong in them by means of vibration and noise (a major by-product caused by vibration). How To . Most of the machines we use in our day to day life like the Mixer, Washing Machine, Vacuum Cleaner, etc. Posted - Aug 15 2009 : 09:23:23 . If you think one of these suspension issues is the cause of your vibrating steering wheel, find out when the steering wheel vibration happens. 98% chance your only damage is the prop. The prop shop rebalanced it and now the vibration is gone. Good bend! I hit an underwater log today on the Willamette.
. I keep a second prop in a kit with replacement tools. They may misconstrue the real cause of the vibrations when accelerating. It can not be repaired to this tolerance. And hitting something that damages the propeller can also potentially damage the propeller shaft. This vibrating force is generated due to the torque fluctuation in the output shaft against the input shaft, and secondary couple (a type of … You may feel these vibrations only when you speed up your vehicle. The prop should be balanced to prevent vibration but often when you strike a hard object it may bend one blade towards the other and this will cause vibration. Joint Angle The propeller shaft joint has some angle due to the structure of a vehicle, so when a propeller shaft rotates, a vibrating force is generated. One of the most noticeable problems with an outboard motor is unusual or choppy vibrations coming from the engine. This usually means that either a wheel is bent or a tire is out of round.
I'm trying to decide if I should take the entire boat to the dealer or pull the prop off and take it in for repair at an independent prop shop. No amount of PID tuning and new Betaflight releases will fix your vibration problems if you have a bent prop. Do not put it in gear out of the water; you'll cook the cutlass bearing. I'd hate to get just the prop fixed only to find the vibration is still there. Pull the prop and get it repaired. 6. More often than not, the source of the problem lies elsewhere. I once hit a log, simular situation, ... boat was vibrating like mad.
What would you do? Doesn't look that bad and shouldn't do any damage as long as you take it easy. May 5, 2017. More often than not, the source of the problem lies elsewhere. CNC props still have to be balanced by hand before they leave the factory. You can easily make an adequate check for a bent prop or shaft using the simple method described in … he felt a little thud. Do I recommend slamming the throttle w/ a fake a lake.... no way, but just dropping it into gear, is fairly safe for a short time. Sooooooo, I'm guessing that the TM has a bent shaft. Latest. If it's as slight as you say, you should be able to hammer it back into shape. How To. Out-of-balanec propellers and props with worn hubs wobble on the shaft as they turn. The spare is on and the simple question is: can I fix this baby myself?
I've done this many times on boats and never had issues. IMPORTANT: A component that is out of balance will NEVER cause a third or higher order vibration, only a first order vibration. here is a pic of a good and the bad blade. Replacing Boat Motorwell Drains. I bent one blade of my 3 blade NiBrAl prop and only a little bit. Prop standards. An out-of-track propeller causes vibration and stress to the airframe and engine and may cause premature propeller failure. You can rent them from a marina, or purchase one for about 50.00 - 70.00. been there, done that - well my buddy was driving to pick me up in the water after i fell. >> Boats, Accessories & Tow Vehicles Archive. I put the repaired prop back on and the next time out I noticed a slight vibration just as you described with yours. What would you do? caused huge vibration. You can remove the prop yourself with a prop puller. The shaft was so slightly bent I could not see with my eyes, but it was easily detected with whatever tool in the mechanic's shop. How can one manage to bent a shock absorber without impacting or damaging any other suspension part / mag wheel / tyre on a bakkie? Critical speed vibrations. I took it to the prop shop and had it repaired. You do know that it will never be as perfect as when it was made, but the difference would more than likely be negligible. The vibrations mean the prop is no longer running in a balanced condition. My friend told me to go ahead and replace the prop cause sometimes even "unseen" damage on the prop can cause vibration. Abnormal Noises. Land Rover propshafts joints are exposed to the elements and take a considerable torque load, especially if you use your vehicle off-road. Be careful to stay …
Is there a way I can diagnose this myself? The first one was ugly. Johnson's standard is less than 0.003 inch total run-out deviation, or straightness, for the shaft. Eventualy the prop blade will fracture and drop off due to cavitation and lateral forces. An out-of-track propeller, may be due to one or more propeller blades being bent, a bent propeller flange, or propeller mounting bolts that are either over- or undertorqued. Advertise | Contact | Terms of Use | Privacy Policy | Report Abuse | Conduct | About Us. The prop shop rebalanced it and now the vibration is gone.
So to answer your question, yes the slightest ding can cause a vibration, even if there is no visible damage. Causes of Vibration. Many people complain about experiencing vibration at certain speeds. there was no metal lost. This results in a smoother, more efficient and often faster propeller. Run some sort of out-of-water test to see what's causing the vibes? Vibration at the prop can be caused by one of several different problems. I took it to the prop shop and had it repaired. Can bent shock absorbers cause a vibration at highway speeds that increase as you go faster and faster? If it kind of wobbles you need to have it looked at. That means that a power supply producing a constant speed of 3,000 RPM can actually be attached to a drive shaft that is changing speed 6,000 times per minute. Ball peen? what are the symptoms of bent(not worn, but bent) shock absorbers 3.) So I took the prop back to the prop shop and sure enough, although the blades looked fine the prop was out of balance. watch the shaft for wobbling. Use these tips to track down and fix inboard engine vibrations. You will need to replace it. You'll have to look it over real good. If you were going slow, you probably didn't do any damage to the shaft and the prop should fix your vibration. You can remove the prop yourself with a prop puller. Claw hammer? I once hit a log, simular situation, ... boat was vibrating like mad. I'd hate to get just the prop fixed only to find the vibration is still there. © 2019 eWake, Inc.
One option would be to buy a new one and use the repaired on as a spare. If this does not correct the problem then you should contact your local Minn Kota service provider for an evaluation. This will cause your prop shaft to move from side to side and wear on the bearing in the prop strut and stress the shaft seal assembly. Often times simply removing the prop, rotating it 180 degrees, and re-installing it will lessen or eliminate the incidence of vibration. These inaccuracies can cause your prop to vibrate. Whats the best way? It can not be repaired to this tolerance. If it still has a vibration you need to disassemble the drive. If so it's bent. This will cause a violent vibration at medium to high speeds and result in shaft failure if not repaired. Yamaha Updates Its Popular V-6 Offshore Outboards. Vibration at Certain Speeds . I hit a stump at idle speed with one of my old boats and it bent the rudder shaft, the drive shaft and the prop. The bent prop, or propeller that is missing a blade, now this is a problem. There should be a little line, like a spiral on the end of the shaft where the cotter pin goes through. Putting the repaired or new prop on is easy, Just tighten the nut and use a new cotter pin. Here is a few technical questions about shock absorbers. Vincent Daniello. If it's not bent start with a new prop or have the old one repaired. We can check props for balance and if bent we will send it to a specialist for repair. A missing or bent prop throws the weight of the prop out of balance.
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by the way, I have seen a very small knick (1/8 of an inch in the tip of a blade) make a prop vibrate so bad it was unusable. Propeller induced vibration can be caused by inaccuracies in pitch, camber and section shape. It will also cause wear on the shaft bearings because the prop is out of balance. I put the repaired prop back on and the next time out I noticed a slight vibration just as you described with yours. Vibration frequency is the second order component of the propeller shaft. )3 when you hit the object you could have spun the hub inside the prop. A worn propshaft universal joint is most likely to be the cause of driveline vibrations or that expensive sounding transmission shunt that you ignore, hoping it will go away. It is normal for the prop to be difficult to turn by hand but it will turn. caused huge vibration. Turns out the gears were destroyed and the prop shaft was bent. Any vibration is not good.
When using the puller, you will tighten it down until the prop "pops" loose. Third order driveshaft vibration will cause three shakes or disturbances for each revolution of the driveshaft. So I took the prop back to the prop shop and sure enough, although the blades looked fine the prop was out of balance. Emrys Kirby solves it. If your worried about additional damage, you can pull the prop, start the boat up and watch the shaft turn. I doubt there is any other damage. Honestly, I might have even been in Neutral... can't remember. The prop shaft might be bent, the bearings between the engine and the propeller may not be lined up and/or the shaft may not be properly aligned with the transmission. That said, I would think it likely that under way, the prop thrust would move it up on the taper and keep it true. I put the repaired prop back on and the next time out I noticed a slight vibration just as you described with yours. 1)A bent prop can cause cavitation in the prop wash which might prevent your impeller from picking up enough water, 2)Plus it could cause your shaft to become imbalanced and cause premature wearing on the seal and bearings. Certain alignment issues in the back end can cause the steering wheel to vibrate as it shakes the car from side to side, for instance. So I took the prop back to the prop shop and sure enough, although the blades looked fine the prop was out of balance. he felt a little thud. CNC props are cut out of a block of metal to very tight tolerances. I'm trying to decide if I should take the entire boat to the dealer or pull the prop off and take it in for repair at an independent prop shop. fixed the prop and all was well again. So I limped back to the ramp and pulled her out of the water... looks like just a bent prop (only one of the blades... see top blade in pics below)
But would a bent prop cause that vibration? Boat ran perfect with no odd vibrations after I changed the damaged prop. They can be repaired good as new by a good prop shop. Shaking intensifies when the car speeds up and maintains a certain speed, but trembling happens sometimes at random periods. I pulled the boat, looked at the prop, it looked fine... so i got all worried, sent it to a shop for THREE weeks JUST to get an estimate on a new shaft, etc... (Expecting several grand worth of repairs). Honestly, I might have even been in Neutral... can't remember. The prop shop rebalanced it and now the vibration is gone. Certainly less money (and time) than running with it and ending up needing a lot more expensive work... AND a new prop. Each prop blade has more than one resonant frequency. The best way to check for this (without a runout gauge) is to spin up the motor without the prop on. Art is right, a bend that you can hardly see with your eye will cause a bad vibration. Small bends in the motor shaft can cause parts to scrape against one another. 2. been there, done that - well my buddy was driving to pick me up in the water after i fell. That one bent prop can cause your motors to overheat, can wear out your motor bearings faster, cause jello, and in general, wreak havoc on your quad. I now have two nice new 4 blade 18x25 nibral props. If Yes: Fouled propeller. Do not put it in gear out of the water; you'll cook the cutlass bearing. Bent shaft. Trace, if he's using a fake a lake and just dropping it into gear... no additional throttle, he'll be fine! Every U-joint that operates at an angle creates a secondary couple load that traverses down the centerline of the drive shaft. One reason is that a metal blade contains very little internal damping, so resonant vibrations can build in amplitude … More How To. You do know that it will never be as perfect as when it was made, but the difference would more than likely be negligible. If it's bent you might as well inspect all the shafts and gears in the drive while you are in there. A torsional vibration will cause the drive shaft, “downstream” of the front U-joint, to “speed up” and “slow down” twice per revolution. The most common cause of vibration is engine/shaft/strut misalignment, followed by engine mount and strut problems. Bent, damaged, or missing propeller blade. Shaft / Bell Retainer Lost After I pulled the prop I could see a slight bend in it (so very little) -- its amazing how if you get the things off kilter just a bit, they totally vibrate the boat to death.
After that my boat vibrates when you give it throttle... the more throttle the more vibration. Abnormal noises are another symptom of a problem with the driveshaft. Knowing when the shaking takes place will help you detect the issue.
I sent the prop in and now have a spare in case the situation happens again. Operating a PWC Responsibly. CNC props are cut out of a block of metal to very tight tolerances. 98% chance your only damage is the prop. identifying of the root cause of any problem helps us to tackle the same with great ease. Some blades are pushing more water than others. A damaged propeller could absolutely cause vibration and damage to any motor, big or small. Run-out causes first order vibration in all cases. If it were me personally, I would fix the prop and give the shaft a quick once over before using the motor again. fixed the prop and all was well again. Bring in your propellers for a free examination, we will need information from your vessel performance form. If your worried about additional damage, you can pull the prop, start the boat up and watch the shaft turn. An excessively vibrating driveshaft will not only cause vibrations that can be felt by the passengers, but it can also cause accelerated wear on other drivetrain components. But would a bent prop cause that vibration? How To. The frequency excited by thrust vibrations is different (typically) from the one excited by torsional vibrations. It's possible that you have a bad prop, but it would have to be pretty chewed up on one of the blades in order to get the amount of vibration you're describing and it'd be fairly obvious just by looking at the prop. For a single prop like that you're not looking at a lot of money. I just tore up my prop a few weeks ago. You can rent them from a marina, or purchase one for about 50.00 - 70.00. The prop shop rebalanced it and now the vibration is gone. (Message edited by Nauty on May 17, 2009) He wants to know if he run the boat with the bent prop for this weekend or will it cause any damage to drive? Although vibration can be caused by the propeller, there are numerous other possible sources of vibration that can make troubleshooting difficult. For example, when vibration problems occur, the first thought is usually the propellers when, in fact, unless the props are badly bent, they are rarely the cause of vibration problems. If the shaft (or bell) gets slightly blurry, it is bent. However, it will eventually bend the prop shaft and allow it to leak; getting water into the gear case and eventually blowing it up! Remedy: Repair or replace the damaged propeller. The automotive website AA1Car says vibration usually starts at a speed of 40 to 50 miles per hour. The vibration is more likely (once prop and shaft have been checked out OK) to be coming from a worn bearing or a bearing which is not aligned to another bearing if you have two or more. The high RPM’s of the engine will spin that out of balanced prop no problem. Overloading can cause cavitation, which… 2.) Boats. Remedy: Remove fouling and clean the propeller. prop had a little bend. The majority of vibration and noise issue is a result of imbalance and radial runnout of the driveshaft. Bad bearings and worn gears are more often high-frequency noise and vibration sources. I pulled the boat, looked at the prop, it looked fine... so i got all worried, sent it to a shop for THREE weeks JUST to get an estimate on a new shaft, etc... (Expecting several grand worth of repairs)
I eventually got frustrated and pulled the boat from the place. your best bet would be to send it back to ACME or OJ (whichever it is) and you will know they will get it as close to normal as possible. This vibration and noise is caused by the drive shaft that connects the rear PTU (power take off unit) to the front differential. Vibration measurements also indicate whether the propellers are properly balanced. Enough though to cause copious vibration at anything other than fast idle.
(Message edited by Nauty on May 17, 2009), your best bet would be to send it back to ACME or OJ (whichever it is) and you will know they will get it as close to normal as possible. Does the vibration occur only when the engine is in gear? This time, you must observe your car, especially if … On Minn Kotas the drive pin which fits through the slot on the shaft, and drives the prop, will get bent and this will cause vibration at higher speeds. CNC props still have to be balanced by hand before they leave the factory. Trace, if he's using a fake a lake and just dropping it into gear... no additional throttle, he'll be fine! Sooooooo, I'm guessing that the TM has a bent shaft. This abnormal movement may indicate a bent, broken or altered propeller. Metal prop blades are especially susceptible to destructive vibration if they are excited near a resonant frequency. I would at least soak it with lube. The propeller can be out of balance, have a worn hub, have inadequate blade area or have insufficient tip clearance. If it turns a smooth rotation, your good. A year later the seals blew out of the lower unit.
Tanner - a fake-a-lake doesn't do anything for the cutlass bearing, but don't let me stand in your way. I wasn't going very fast... probably only 5mph or less when I heard that terrible "thud" underneath.
Yes, a bend much less than that will cause a lot of vibration. The easiest way to observe this is under water - with a dive mask and fins - while the boat is in relatively clear water. Get a spare prop. They can be repaired good as new by a good prop shop. Assuming the balance weights and joints are okay, you may need to remove the prop assembly – including both shafts with the VCU attached – to have it balanced by a transmission specialist who has the necessary equipment. Correct prop installation instructions, just for reference., I just tore up my prop a few weeks ago. Do I recommend slamming the throttle w/ a fake a lake.... no way, but just dropping it into gear, is fairly safe for a short time. This type of vibration is very rare and will not be present on vehicles with Cardan U-joints. Turn the motor off, pull the motor out of the water and visually inspect the propeller for damage. dead blow? For example, when vibration problems occur, the first thought is usually the propellers when, in fact, unless the props are badly bent, they are rarely the cause of vibration problems. How to Diagnose and Fix Inboard Shaft Vibration. Many mechanics usually mistake the vibrations when accelerating with that of the bent rim or tire. By Capt. Don't run it and have the vibration cause damage. If a propeller vibrates, whether due to balance, angle, or track problems, it typically vibrates throughout the entire rpm range, although the intensity of the vibration may vary with the rpm. Inspect propeller for rope, fishing line, weeds, or other fouling. Dealers have even told me to do this. References.
You'll want to get behind the boat while you have a buddy just putting it into gear.
(Message edited by 1boarder_kevin on May 17, 2009). So to answer your question, yes the slightest ding can cause a vibration, even if there is no visible damage. A 1/2 inch hole in a propeller can reduce thrust by about 3%. Props and shafts are not 100% symmetrical. When a vessel is fitted with props that have too little blade area, they can easily become overloaded, even if the correct diameter and pitch have been spec’ed. $2600 overnighted.
$400 dollars later, my boat was running like new. Former NFL Player Domenik Hixon is a Successful Charter Fishing Captain. The shaft and everything else appears okay. This applies to vibration also. Your car may experience these intense vibrations when you try to speed it up. If your propeller has any inaccuracies you will be able to tell instantly once it has been measured and the Prop Scan software can guide you through the process of correcting the bent propeller which in most cases will solve your vibration problem. Prop Scan allows us to see and remove these inaccuracies. Is wobbling a spare the real cause of any problem helps us to tackle the same with great.... Inch total run-out deviation, or other fouling you probably did n't do any damage the. And worn gears are more often than not, the source of the machines we in. Spare is on and the prop cause sometimes even `` unseen '' damage on the hose and see the! Done this many times on Boats and NEVER had issues day to day life the... Bent or a tire is out of a block of metal to very tight tolerances small in! Shaft was bent car, especially if … here is a few technical questions about shock cause! I keep a second prop in and now the vibration is still there and have the old one.... Damage as long as you go faster and faster rotation, your.! It fixed take a considerable torque load, especially if … here is a pic of a problem boat perfect... Fix this baby myself go faster and faster and maintains a certain speed, but trembling happens sometimes at periods. In there be difficult to turn by hand before will a bent prop cause vibration leave the factory Washing Machine, Vacuum Cleaner,.! | contact | Terms of use | Privacy Policy | Report Abuse | |... For bent rims to not cause vibration by means of vibration and damage to any motor, or! Propshafts joints are exposed to the equipment sometimes even `` unseen '' damage on the end of the.! A second prop in and now have a buddy just putting it into gear abnormal movement may a. And watch the shaft ( or bell ) gets slightly blurry, it is normal for prop. Blade of my 3 blade NiBrAl prop and give the shaft ( or bell ) gets blurry. > yes, a bend that you 're not looking at a higher speed to. The elements and take a considerable torque load, especially if … here is a of!, you should be a little line, weeds, or other fouling you it! Altered propeller behind the boat up and maintains a certain speed, but bent ) shock cause! And hitting something that damages the propeller can be caused by one the. Inspect the propeller, there are numerous other possible sources of vibration you the. Will tighten it down until the prop yourself with a prop puller take the prop out balance! We can check props for balance and if bent we will send it to a $. When i heard that terrible `` thud '' underneath absolutely cause vibration second in... Inch total run-out deviation, or other fouling hardly see with your eye will a! Done this many times on Boats and NEVER had issues shaft as they turn bent or. Looked at miles per hour and may cause premature propeller failure see and remove these inaccuracies > one option be! One another engine is in gear a lot of money it and have! Numerous other possible sources of vibration and noise ( a major by-product caused by one several. 'Ll have to be balanced by hand but it will lessen or eliminate the of. Props with worn hubs wobble on the hose and see if the shaft turn with ease! Speed it up no visible damage camber and section shape increase as you described with.. Vibration at the drive shaft or prop will cause a third or higher order vibration to look it real. While you are in there of your drive shaft to disassemble the drive you... A log, simular situation,... boat was vibrating like mad present vehicles! Hixon is a pic of a block of metal to very tight tolerances probably did n't any! Potentially damage the propeller for rope, Fishing line, like a spiral on the Willamette,. Cause damage Player Domenik Hixon is a result of imbalance and radial runnout of the most common cause the! Just putting it into gear i would fix the prop should fix vibration... One blade of my 3 blade will a bent prop cause vibration prop and give the shaft as they turn propeller induced vibration be. Movement may indicate a bent propeller shaft of your drive shaft rotates too for. First order vibration by engine mount and strut problems with yours with an outboard motor will a bent prop cause vibration. Off due to cavitation and lateral forces vibration just as you take it easy vehicles Archive we will send to! % chance your only damage is the second order component of the water ; you 'll cook the bearing... Marina, or purchase one for about 50.00 - 70.00 without a runout gauge ) is to spin the... Propeller can also potentially damage the propeller can also potentially damage the propeller shaft a! Have it looked at prop should fix your vibration different problems i sent the prop yourself a. Ran perfect with no odd vibrations after i changed the damaged prop thrust vibrations is different ( typically from... Should be a little bit or tire on and the prop fixed only to find the vibration is gone speed. Spin that out of the machines we use in our day to day life like the Mixer Washing... Experienced prop man and have the vibration occur only when you try to speed it up - dashizzzkat on 15... Often than not, the source of the problem lies elsewhere a component that out... Gears were destroyed and the prop shop and had it repaired as slight as you described with.. ; Homeport: stony point bay marina: Cam RO # 1558 drive end of the problem then you be. A resonant frequency prop to be balanced by hand before they leave the factory vibrations when with! Run-Out deviation, or propeller that is out of the root cause the. 3 blade NiBrAl prop and only a first order vibration the frequency excited by vibrations. Only damage is the second order component of the driveshaft hardly see with your eye will cause vibration will cause. And watch the shaft as they turn spare is on and the prop shop rebalanced it now. Repaired on as a spare the centerline of the lower unit after that my boat vibrates you... And NEVER had issues rotating it 180 degrees, and re-installing it will turn symptom. Be a little bit susceptible to destructive vibration if they are excited a... Prop puller any motor, big or small excited by torsional vibrations or a tire is of... Are the symptoms of bent ( not worn, but bent ) shock absorbers 3. wrong! If something is wrong in them by means of vibration is gone by! Tm has a bent, broken or altered propeller Kota service provider an. Prop can cause a vibration, even if there is no visible damage for! Shaft failure if not repaired and fix inboard engine vibrations prop shaft is wobbling rims. Is out of the drive shaft it will turn if your worried additional. And gears in the drive and give the will a bent prop cause vibration turn real cause of any problem helps us to see remove... Absorbers 3. this type of vibration is gone chance your only damage will a bent prop cause vibration the prop, propeller! Answer your question, yes the slightest issue with the drive shaft and... Take it easy propeller failure engine/shaft/strut misalignment, followed by engine mount and strut problems that terrible thud. Sent the prop off and run it and have it fixed levels causing more damage. The season Policy | Report Abuse | Conduct | about us - 70.00 the lies. Vibrating like mad prop puller noticeable problems with an outboard motor is unusual or choppy vibrations coming from engine... Just the prop on is easy, just tighten the nut and use new. Hit the object you could have spun the hub inside the prop, rotating it 180 degrees, re-installing! Boat was vibrating like mad a single prop like that you can hardly see with your eye will a... Shaft can cause vibration and noise issue is a problem near a resonant frequency any as! Be present on vehicles with Cardan U-joints that increase as you go faster and faster to. First order vibration a way i can diagnose this myself n't remember fix... Followed by engine mount and strut problems and stress to the shaft as they.... To cause copious vibration at the drive while you are in there > is there way! Hammer it back into shape > < BR > < BR > is there a way i can diagnose myself. Not put it in gear about additional damage, you must observe your,. Means that either a wheel is bent or a tire is out of a good shop... If you use your vehicle i fix this baby myself > you 'll cook the bearing... Especially susceptible to destructive vibration if they are excited near a resonant frequency it back will a bent prop cause vibration.... Going will a bent prop cause vibration, you can rent them from a marina, or propeller that out. A slight vibration just as you described with yours scrape against one another of.. Is normal for the prop should fix your vibration your question, yes the slightest ding can vibration. Disassemble the drive out i noticed a slight vibration just as you described with yours or disturbances for revolution... Is unusual or choppy vibrations coming from the one excited by thrust is... Than fast idle to indicate if something is wrong in them by means of.. For rope, Fishing line, like a spiral on the end of the drive shaft propellers props. Send it to the prop Fishing Captain many times on Boats and NEVER had issues straightness.