Backfiring symptoms.
Posted: Tue Jan 17, 2012 9:04 am
As a general rule,backfiring INTO THE MUFFLER indicates TOO RICH a fuel mixture.Backfiring INTO THE CARBURETER indicates TOO LEAN a mixture.Make necessary adjustments at carbureter.STICKING VALVES or WEAK VALVE SPRINGS will also cause backfiring.Extremely LATE IGNITION TIMING will cause backfiring. 