Engine Operation Problems; Engine Knocks - Tecumseh OHH50 - 65 Technician's Handbook

For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983

ENGINE OPERATION PROBLEMS

SURGES OR RUNS UNEVENLY

ENGINE KNOCKS

OVERHEATS
Associated equipment loose or
Excessive engine loading Fuel cap vent obstructed
improperly adjusted
Check for excessive carbon in
Low oil level or wrong viscosity oil Dirty carburetor or air filter
combustion chamber
Loose flywheel examine key, key way Cooling air flow obstructed or clogged
Carburetor improperly adjusted
and proper flywheel nut torque
cooling fins
Carburetor improperly adjusted or Governor sticking, binding or improper
Ignition timing or
improper RPM setting* RPM setting
incorrect spark plug
Ignition timing or
Carburetor linkage, shafts or shutters
Loose or worn connecting rod
incorrect spark plug
sticking or binding
Intermittent spark, check ignition or
Worn cylinder Carbon in the combustion chamber
incorrect spark plug
Lean carb setting causing overheating
EXCESSIVE OIL CONSUMPTION
(adjustable carb)
Oil level above full Piston rings worn
Wrong viscosity oil Worn or glazed cylinder
Valve guides worn excessively
Excessive engine speed
Engine cooling fins dirty causing
overheating
Breather damaged, dirty or improperly
installed
Damaged gaskets, seals or "O" rings
www.mymowerparts.com