1979 80hp Mercury - Engine noise causing engine to stall, runs for about 5 seconds

79calglass

Cadet
Joined
Aug 30, 2011
Messages
20
In a previous post my motor was difficult to start. The crankshaft seemed really tight.

The crankshaft spins freely now but makes a tinging, scratchy god awful noise when running. The motor sounds nice, it's firing and wants to run but is being held back by some resistance it seams, from internally. I attempted to throttle through it and it accelerated nicely but the resistance killed it.

My thoughts are that the engine has crap or something in it which is causing it to jam up inside.

Any thoughts?
 
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