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Problem: |
Engine dies after
warm-up. |
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Possible Causes: |
Internal
coil, external coil |
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Problem: |
Engine floods in base |
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Possible Causes: |
Bad fuel pump Diaphram, bad
needle and seat in carberators, choke
plunger stuck,
priming too frequently |
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Problem: |
No spark at plugs |
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Possible Causes: |
Plugs
bad/fouled, resistor cap faulty,
plug wire bad, by-passed kill-switch &
ignition switch,
tether wiring harness could be pinched or
fried. Test
external coils, test internal coils, test
ohms. Try
another CDI or replace point and condenser.
Inspect
flywheel for loose or missing magnets. |
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Problem: |
Light bulbs burning
out |
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Possible Causes: |
Voltage
Regulator |
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Problem: |
No Power |
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Possible Causes: |
Plug cap
resistor bad (replace), plugs fouled, might not fire under
compression,
compression low and unequal in cylinders,
plug wire
bad, faulty reed valves, bad head gasket,
warped
head exhaust leaking or plugged, air box
plugged, main or other jets too small or too large. |
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Problem: |
Engine doesn't run at
all |
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Possible Causes: |
Bad spark
plugs, loose gas lines or
pin holes, bad fuel pump, bad head gasket, carbs not adjusted properly, air leak between carb
flanges, air
leak between base halves, crank seals
leakage, center
crank seal bad, carbs need cleaning. |
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Problem: |
Low compression |
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Possible Causes: |
Head gasket
blown, head warped,
rings stuck, hole in piston, gouge on
cylinder wall. |
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Problem: |
Engine backfires |
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Possible Causes: |
Head gasket
blown, external or
internal coil misses, bad wiring harness, killswitch bad,CDI faulty, safety switch, bad crank
seal ( either outer or inner).
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Sno-parts East
New, Used & Vintage Snowmobile Parts
Allen Pond Road
Greene, Maine
207-946-5788 |
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