Re: OMC Outdrive 1988
Yes you have the COBRA drive and you may have a problem with the U joints.If the drive has not been off in the time you have owned this boat or if you just got it and don't know , then pull the drive, have the joints inspected and if found good lubed.Also you have valves in the exhaust pipes of this unit that can emit the same types of sounds that you might be hearing,especially if you are idleing rough,which it sounds like you may well be.Check your state of tune.