Four Winns Volvo Penta 4.3 runs rough under power.

mjp62

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Joined
Aug 8, 2011
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2
My 2005 Four Winns Volvo Penta 4.3 engine runs rough, and back fires when I Throttle up . It idles great. I changed the gas separator And cleaned the screen at the carb .
the temp is 165 and, I have great oil pressure. It was running fine at 25mph . when this started yesterday. I can't figure out what to check next.
Any help would be appreciated .
 
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