Force/US Marine 50hp

ATLfisher

Cadet
Joined
Mar 22, 2009
Messages
15
I have 50 hp Force model #507F5A motor. It cranks and idles ok but when put under load it boggs down. I pulled wire of top plug off and motor stopped completely. I am pretty sure it is running on only one cylinder. I changed ignition coil and plugs to no avail. I am going to pull head and check head gasket and piston. Is there anything else I can look for?
 
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