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ethyl
06-06-2010, 08:44 PM
I have a distinct vibration at low rpm with my M mercruiser and noticed that the prop wabbles a bit with unit in gear with muffs running out of the water. I tried two different props and they both acted the same. Could this be a bent prop shaft or carrier bearing problem? Thanks for any input, John.

Carbo
06-06-2010, 09:24 PM
Spin the prop and watch the shaft. You should be able to see if the shaft is bent by watching it.

Planetwarmer
06-07-2010, 09:18 PM
I would think with a bent shaft, the vibration would get much worse the faster the prop spins. Your engine may me the vibrator!:wink:

MOP
06-07-2010, 09:32 PM
Merc allows .030 out of tolerance, I have seen them with quite a whip and did not feel it in the boat!

mrfixxall
06-07-2010, 10:29 PM
Merc allows .030 out of tolerance, I have seen them with quite a whip and did not feel it in the boat!

Mop the last i checked it was .009 so ill split the differance with you and say .019.500 :)