00-028
UnclassifiedSpeed
What This Code Means
Excessive engine noise; Engine overspeeds; Low engine power output; Engine runs rough; Engine misfires; Engine power output low
Possible Causes
- •Valve lash out of specification
- •Incorrect starter to ring gear clearance
- •Governor adjustment issue
- •Throttle cable issue
- •Governor issue
- •Carburetor choke issue
- •Fuel filter issue
- •Air cleaner element issue
- •Fuel pump issue
- •Carburetor issue
- •Intake manifold gasket leak
- •Engine cylinder leakage
- •Spark plug issue
- •Fuel supply issue
- •Governor adjustment
- •Throttle cable
- •Governor ball spacer
- •Governor
- •Carburetor choke
- •Fuel filter
Suggested Actions
- 1Check valve lash
- 2Check starter to ring gear clearance
- 3Check governor adjustment
- 4Check throttle cable
- 5Check governor
- 6Check carburetor choke
- 7Check fuel filter
- 8Check air cleaner element
- 9Check fuel pump
- 10Check carburetor
- 11Check intake manifold gaskets
- 12Perform engine leak down test
- 13Check spark plugs
- 14Check fuel supply
- 15Check governor ball spacer
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