[quote]Originally posted by mudpiemaker42
[b]the back fire is caused by detonation that's when you turn off the engine it
will turn over several more times sucking gas into the combustion chamber.
the engine is so hot that the gas ignites from the heat. the back fire you
hear is the explosion from the gas igniting. try letting your mower run at
idle for at least one minute before you turn it off also check idle speed
adj. it could be to running to fast at idle also check high speed fuel adj.
it could be running to lean making engine over heat
"caj" wrote in message
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Thank you very much! I will do everything you have said.