Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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How long does your engine have to run, before the backfiring began?
Is your engine backfiring through your muffler, or through your carburetor?
Thanks for this additional information. It is possible that your intake valve is not properly seating.
Do you know if the engine ran satisfactorily prior to being stored?
Thanks for clarifying that your engine is a two cycle.
Can you give me a minute to pull up a diagram for your engine?
Thank you for waiting. I am back with you.
You said your engine backfires after couple of minutes. Does your engine run smooth up until you reach the two minute mark?
Based upon what we have covered, there are a couple of things I would check.
I would check for a partially sheared flywheel key, and focus on your ignition coil.
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