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NS40C loss of acceleration at WOT

Dterry

Contributing Member
Hi all,

I just recently replaced my clutch dog and found it help with gaining back acceleration (engine Rev's but with no acceleration). Know my boat moves at about half throttle before the engine Rev's without any forward thrust. I'm leaning towards a crankshaft bearing issue by the sound of engine (see video). Has anyone come across this? Having trouble figuring it out. ]https://youtu.be/78FLLPIEPho[/URL]

Dan
 
I have bought a new prop and marked it to check if it was spinning, prop is fine. Still thinking the high pitch whine coming from the engine is causing my issue.
 
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