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57 Mercrusier

monterey

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"What would cause a loud high

"What would cause a loud high pitch humming noise, than a few min. later the engine shut off. Now after it has started it sounds like the enging is braking apart."
 
"Starter sitll runing without

"Starter sitll runing without the drive engaged with the flywheel? If so, you have two reasons to put another starter in: it got stuck ON, and it's now junk.
Jeff"
 
Was it under a load when this

Was it under a load when this all started? You may have lost an upper gear set. (I'm assuming this is a stearn drive)
 
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