What causes backfiring from muffler
#2
What causes backfiring from muffler
My 300 had the same problem. i was told that AC jets the carbs to run rich so i took out my jet and put in the next size smaller. it helped allot with the backfiring but i still get a pop out of it once in awhile. before you do this make sure it is running rich to begine with. if it is to lean then it could burn a hole in the top of the piston if it is jetted wrong.
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