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

ENGINE OPERATION PROBLEMS

BREATHER PASSING OIL
ENGINE MISFIRES ENGINE VIBRATES EXCESSIVELY
Oil level too high
Wrong or fouled spark plug Bent crankshaft
Excessive RPM or improper governor
Carburetor improperly adjusted Attached equipment out of balance
setting
Damaged gaskets, seals or "O" rings
Valves sticking or not seating properly Loose mounting bolts
Breather damaged, dirty or improperly
Incorrect spark plug or If applicable counter balance not
installed
Ignition timing properly aligned
Piston rings not properly seated or ring
Excessive carbon build up
end gaps are aligned
Improper Valve Lash or
Angle of operation too severe
Weak valve springs
LACKS POWER
Air intake obstructed
Lack of lubrication or improper
lubrication
Carburetor improperly adjusted
Exhaust Obstructed
Improper valve lash
Loss of compression (worn rings,
blown head gasket)
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