Engine Operation Problems - Tecumseh ECV100 - 120 Technician's Handbook

ENGINE KNOCKS
Associated equipment loose or
improperly adjusted
Check for excessive carbon in
combustion chamber
Loose flywheel, examine key,
keyway, and proper flywheel nut
torque
Incorrect spark plug or Ignition
timing
Loose or worn connecting rod
Worn cylinder

ENGINE OPERATION PROBLEMS

OVERHEATS
Excessive engine loading
Low oil level or wrong viscosity oil
Cooling air flow, obstructed or
clogged cooling fins
Carburetor improperly adjusted or
improper RPM setting
Incorrect spark plug
or Ignition timing
Carbon in the combustion chamber
Incorrect or damaged flywheel key
EXCESSIVE OIL CONSUMPTION
Oil level above full
Wrong viscosity oil
Excessive engine speed
Engine cooling fins dirty causing
overheating
Breather damaged, dirty or
improperly installed
Damaged gaskets, seals or
"O" rings
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
Incorrect spark plug or Intermittent
spark, check ignition
Lean carb setting causing
overheating (adjustable carb)
Piston rings worn
Worn or glazed cylinder
Valve guides worn excessively
Valve guides worn excessively
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