A
ENGINE
WARNING:
Do
not service
tractor
while engine is running.
ENGINE KNOCKS
PROBLEM
CAUSE
REMEDY
ENGINE RUNS
l
RREGULARLY OR STALLS
FREQUENTLY
ENGINE HARD TO START
OR
WILL NOT START
Water, dirt. or air in fuel
system.
Clogged fuel filter.
No fuel or improper fuel.
Fuel shut-off valve closed.
Fill tank. If wrong fuel.
drain and refill with proper
fuel.
Hand throttle not pushed
forward.
Decompression lever in
decompression position.
Slow starter speed
Cold weather.
Engine oil too heavy.
Dirty of faulty injection
nozzles.
Insufficient oil
Injection pump out of
timing.
Low coolant temperature.
Engine overheating.
Idle speed too slow.
Vent in fuel tank cap
obstructed.
LOW coolant temperature.
Clogged fuel filter.
Water, dirt, or air in fuel
system.
Dirty or faulty injection
nozzles.
Drain, flush, fill. and
bleed
systam.
Replace filter element.
Open shut-off valve.
Push throttle forward.
Turn lever to compression
position.
See "STARTER CRANKS
SLOWLY"
Use cold weather starting aids.
Use oil of proper viscosity.
Have YANMAR dealer check
injection nozzles.
Add oil.
See your YANMAR dealer.
Cover radiator screen.
See "ENGINE OVERHEATS"
Check idle speed.
Clean cap in solvent.
Blow dry.
Cover radiator screen.
Replace filter element.
Drain, flush, fill, and add bleed
system.
Have YANMAR dealer check
injection nozzles.
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REFERENCE
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