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Wayne, Engine Rebuilder
Category: Small Engine
Satisfied Customers: 9442
Experience:  many years on egine rebuilding, lawn mower,roto tiller,Truck,and small engines
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Wayne I bought a bottle of Sea Foam. I put 4 oz in 1gallon

Customer Question

I bought a bottle of Sea Foam. I put 4 oz in 1gallon of gas in the gas tank. I also sprayed some in the carburetor intake as shown in the video on the Sea Foam web site. When I tried to cut grass I still had backfiring. This morning I repeated the air intake spray. After that I still have backfiring. It is backfiring from the exhaust. Any more ideas?
Submitted: 11 months ago.
Category: Small Engine
Expert:  Wayne replied 11 months ago.

HI I'm Wayne

if it is not the valves, cleaner in the gas tank

the only thing left is the carb

it will need to be replaced