Yamy 9.9 4 Stroke Backfiring Out Of Carb

carboman

Seaman Apprentice
Joined
Jul 1, 2008
Messages
43
Starts fine, idles fine and runs fine at higher rpms. However, when ramping it up to speed, either half or full, it is backfiring out of the air intake area of the carb.

I have installed a carb rebuild kit, new choke valve and main jet in the carb. It seems better but still back fires. Any help is greatly appreciated.

Dave
 
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