SURGES OR RUNS UNEVENLY
Fuel cap vent obstructed
Dirty carburetor or air filter
Carburetor improperly adjusted
Governor sticking, binding or
improper RPM setting
Carburetor linkage, shafts or
shutters sticking or binding
Intermittent spark, check ignition
or incorrect spark plug
Oil level above full
Wrong viscosity oil
Engine cooling fins dirty causing
overheating
Breather damaged, dirty or
improperly installed
Excessive engine speed
Damaged gaskets, seals or "O" rings
EXCESSIVE OIL CONSUMPTION
Valve guides worn excessively
Worn or glazed cylinder
Piston rings worn
Lean carb setting causing
overheating (adjustable carb)
Engine Operation Problems
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