150 yamaha misfire @ Wot

jhosea1979

Seaman Apprentice
Joined
Jun 16, 2010
Messages
47
What would cause a misfire only when the timing is advanced? Stator, Pulser?
the problem is i have lost power in my motor. i have completly went throough the fuel system all new lines, pumps, filters carb kits ect.
i was setting up in a test tank to check the timing disconnected the throttle linkage, removed plugs and while looking @ the timing in the fully advanced postion i noticed the timing light cut out it only seemed to happen when the throttle was advanced not at idle postion the cly that are missing are the #3 & #5

Anybody have this issue before? Any Ideas???
 
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