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Taking Care of the Unexpected
174
If Your Engine Quits or Won’t
Start
SYMPTOM: Engine starts, but runs poorly.
POSSIBLE CAUSE WHAT TO DO
idles roughly, too fast,
stalls
Check engine idle adjustment
(page 112). If the problem
persists, see your dealer.
poor engine
performance at
altitudes above
3,000 feet.
Ask your dealer to modify the
carburetion with a high
altitude jet. Refer to High
Altitude Carburetor
Adjustment, page 193.
runs erratically, misfires See your dealer.
blubbers (rich fuel
mixture)
See your dealer.
sooty exhaust (rich fuel
mixture)
See your dealer.
detonates or pings
under load
If applicable, switch to the
recommended octane gasoline
(page 89) or change your
brand of gasoline. If the
problem persists, see your
dealer.
afterfires (backfires) See your dealer.
pre-ignition (runs on
after ignition switched
OFF)
See your dealer.
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