So I’m down at the boat running some new wiring for the pressure water pump and look down in the engine drip pan and see a big bolt, obviously off of the engine just laying there. I look around some more and see another! Uh oh, not good. A quick scan of the engine revealed two missing bolts from the prop coupling- mystery solved. Still two bolts shaken loose makes me think there is an underlying issue, maybe misalignment but I haven’t noticed any unusual vibrations under power. Any suggestions? Needless to say checking the prop coupling will be on my prestart checklist!
Glad I looked
- Thread starter Pagan Baby
- Start date
When I changed my prop shaft, I was taking a video of the coupling removal, and On camera noticed 2 of the bolts were out...just like yours.
i chaulk it up to poor maintenance...mine and the PO.
A couple of years now on the new shaft and coupling, and I check the bolts periodically and all is well.
Greg
i chaulk it up to poor maintenance...mine and the PO.
A couple of years now on the new shaft and coupling, and I check the bolts periodically and all is well.
Greg
Ditto on my boat a few years ago, only in my case I heard a stange clunk when putting in reverse. So I put her in neutral, no clunk. Forward, clunk. Reattached her to the dock and investigation revealed all 4 bolts were loose. Realized they had been loosened and retitghtened several time over a period of years for different reasons. Replaced them and the lockwashers. Everything has been fine since.
I don‘t think there is room for a nut, but will check. Currently the coupling is held to the transmission flange with dead ended bolts and lock washers.