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LT133 backfires

#1

L

ljl777

My Lt133 backfires when I throttle down. I changed the spark plug and it still backfires. Can someone walk me through what to do please?
Thank you, Lou


#2



Deleted member 97405

My Lt133 backfires when I throttle down. I changed the spark plug and it still backfires. Can someone walk me through what to do please?
Thank you, Lou

This series was prone to blowing the exhaust gasket out or breaking the pipe off the muffler. If you have an exhaust leak, it will suck in air on deceleration and detonate the unburnt fuel as the engine is slowing down. Other issues could point to a carb, governor, or valve issue.


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