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Problem: Engine Stops Gradually
Condition
Remedy
1. In-line fuel filter obstructed — damaged
2. Fuel hose obstructed — broken — pinched
3. Head gasket(s) burned out
4. Cylinder head loosening
5. Spark plugs loose
6. Impulse hose cracked
7. High tension wires/coil faulty
8. Float bowl vent hose (TM-style) obstructed —
kinked — damaged
1. Remove obstruction — replace in-line fuel filter
2. Remove obstruction — replace — repair fuel
hose
3. Replace head gasket(s) — service cylinders —
head
4. Tighten cylinder head cap screws
5. Tighten spark plugs
6. Replace impulse hose
7. Service — replace high tension wires/coil
8. Service — replace float bowl vent hose
Problem: Engine Stops Suddenly
Condition
Remedy
1. In-line fuel filter obstructed — damaged
2. Fuel hose obstructed — broken — pinched
3. CDI unit faulty
4. Ignition coil faulty
5. Charge coil (1) faulty
6. Charge coil (2) faulty
7. Gas-tank vent — hose obstructed — damaged
8. Engine seized
9. Throttle/ignition monitor switch faulty —
throttle cable adjusted incorrectly
1. Remove obstruction — replace in-line fuel filter
2. Remove obstruction — repair — replace fuel
hose
3. Replace CDI unit
4. Replace ignition coil
5. Replace coil
6. Replace coil
7. Remove obstruction — replace vent — hose
8. Overhaul engine
9. Replace throttle control — adjust throttle cable
free-play — adjust — connect — replace
carburetor safety switches (VM-style)
Problem: Engine Fails to Stop (Continues to Run, Even with All Switches Off)
Condition
Remedy
1. CDI unit shorted to ground
2. Main wiring harness four-prong connector
disconnected
1. Replace CDI unit
2. Connect four-prong connector