Vibrations

[gop711]

I have a 1985 Sunbird with a 4.3L engine.<br /><br />At idle speed and rev. up at idle no vibration.<br /><br />With motor engaged I have a vibration that seems to be worst when turning. <br /><br />Could it be the prop? How would I know if the prop needs to be replaced?<br /><br />Any other ideas on what might be causeing the vibration?<br /><br />Thanks<br />Greg

 

[skicat]

Re: Vibrations

Is it a mercruiser? If the vibration is worse during turning, it probably is the u-joints.

 

[gop711]

Re: Vibrations

It is an OMC, thanks for the suggestion.

 

[JustMrWill]

Re: Vibrations

An un-balanced prop will also cause vibrations...hows yours look? Any chips/dents? You can bring it to a prop repair shop and they can usually fix/balance it for less than a new one.

 

[skicat]

Re: Vibrations

I believe 1985 omc also has u-joints

 

[rodbolt]

Re: Vibrations

what OMC drive do you have?<br />if its a cobra it has a gimbal bearing and ujoints