Engine noise

Joined
Jun 24, 2017
Messages
10
Boat was running fine then it died. Acted like it was dead battery turned it over a couple of times it knocking sound twice on each revolution then all of sudden It freed up and turned over fine. Help please
 
Joined
Jun 24, 2017
Messages
10
I've had it a while I just put this motor in though and when I do did the exhaust manifolds I did forget a couple small tags in the holes. But at least one came out exhaust and when I remove manifold again they were all gone so I assume that they all probably blew out and are gone
 
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