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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 26016
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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It runs great low rpm but will not run at gh rpm sputters

Customer Question

it runs great low rpm but will not run at high rpm sputters backfires etc.new spark plugs are black after a few seconds. I put in fresh gas /air filter /fuel filter/changed oil/cleaned carberator new battery/im out of ideas please help.
Submitted: 1 year ago.
Category: Small Engine
Expert:  Curtis B. replied 1 year ago.

Engine model number? Twin engine? Is the choke flap wide open? How far did you go in carburetor?

Expert:  Curtis B. replied 1 year ago.

Engine is flooding from too much fuel.

Customer: replied 1 year ago.
its not a twin eng/ choke is wide open after starting/ I only cleaned floats/ and unstuck choke
Customer: replied 1 year ago.
n/a
Expert:  Curtis B. replied 1 year ago.

You said new spark plugs, So I was thinking twin. Carburetor is the only reason carburetor would flood engine.

Expert:  Curtis B. replied 1 year ago.

The needle valve and float would be the place to look!