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TROUBLESHOOTING ENGINE OPERATION PROBLEMS
ENGINE KNOCKS
Associated equipment loose or
improperly adjusted
Check for excessive carbon in
combustion chamber
Loose flywheel - examine key,
key way and proper flywheel nut
torque
Ignition timing
Loose or worn connecting rod
Worn cylinder or piston
Offset piston incorrectly installed
26
OVERHEATS
Excessive engine loading
Lack or proper lubrication
Cooling air flow obstructed or
clogged cooling fins
Carburetor improperly adjusted or
improper RPM setting
Ignition timing
Carbon in the combustion
chamber
Leaking seals or gaskets
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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
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Table of Contents
Troubleshooting
