Indmar 351 5.7l v8 , Grinding

[ross_larter]

I have and Indmar 351 5.7l v8 direct drive (1991), while crusing at 25 mph I heard a bang then about 2 seconds of a loud griding noise! I made it back to dock at tickover but there is a vibration in the boat that was not there before and a griding noise coming from the engine bay, The water was deep and I didn't see anything in the water, I pulled the boat out of the water and the brass prop and bottom of the boat looks fine (it also rev's fine out of gear, no vibration), do you think I hit something? and any ideas of what is grinding?<br /><br />Cheers<br />Ross

 

[tommays]

Re: Indmar 351 5.7l v8 , Grinding

it can only be the trans or the coupling plate on the flywheel<br /><br />i dont no how yours is connected but on a correct craft the plate on the flywheel has springs between it that fail and make a pretty nasty noise<br /><br />how does your trany fluid look ???<br /><br /><br />tommays

 

[ross_larter]

Re: Indmar 351 5.7l v8 , Grinding

Just spoke the the shop and they said the coupling was loose?, they say they pulled it back and tightened it and all is ok now, would a loose coupling cause such a vibration and noise?<br /><br />cheers<br />ross