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help engine is backfiring changed plug changed air filter and filled gas tank very hard to start then backfires
@hotwheels , Leroy ,Causes of backfire on start up, bad fuel, frayed/damaged plug wires(Shorting out), valve damage, valve adj.,valve push rod damaged, ignition/wires shorting, coil shorting/faulty, restricted exhaust, flywheel key damage(allowing timing to be out), dirty/faulty/adj. carburetor, blown head gasket. You can find video’s on line to show how to diagnose most of causes. Find below a few links that may help in diagnosing your issue. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. http://www.lawnmowerforum.com/showthread… http://www.mytractorforum.com/44-small-e… https://www.smokstak.com/forum/showthrea…