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Troubleshooting - Husqvarna 968999239 Operator's Manual

Stump grinder
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Symptom
The engine will not start
User error
Fuel system
Spark plug
No spark after
checking spark plug
Low compression
Engine is gutless or runs unevenly
Air filter
Fuel system
(Blue exhaust)
(Voluminous blue-white
exhaust)
(Black exhaust)
Ignition system
Low compression
(possible blue
exhaust)

TROUBLESHOOTING

Cause
Fuel valve closed.
Choke valve open.
Engine switch in OFF position.
Fuel tank empty.
Machine stored without
observing proper procedure
from chapter "Storage/Winter
storage".
Contamination, water or ice in
fuel system
Carburetor problems.
Wrong spark plug type.
Buildup on electrodes.
Short circuit.
Gasoline or oil on the spark plug.
Faulty engine switch, cable
or ignition.
Serious interior engine
damage or faulty valves.
Clogged air filter.
Machine stored without observ-
ing proper procedure from
chapter "Storage/Winter storage". Fill the tank with proper fuel.
Tank filled with 2-cycle mixed oil.
Tank filled with diesel.
Choke left on.
Clogged air filter.
Carburetor problems
Wrong spark plug type.
Buildup on electrodes.
Short circuit.
Faulty ignition unit.
Serious interior engine damage
or faulty valve.
Action
Open the fuel valve.
Close the choke with cold engine.
Turn engine switch to ON.
Fill with fuel.
Clean tank, sludge reservoir and
empty carburetor.
Fill the tank with fresh fuel.
Clean tank, sludge reservoir,
fuel lines and carburetor.
Fill the tank with fresh fuel.
Contact an authorized service
workshop.
Replace the spark plug.
Check electrode gap and clean or
replace spark plug.
Clean the spark plug. Air the
engine out. Start with full throttle.
Contact an authorized service
workshop.
Contact an authorized service
workshop.
Clean or replace the air filter.
Clean tank, sludge reservoir and
empty carburetor.
Fill the tank with proper fuel.
Clean tank, sludge reservoir
and empty carburetor.
Fill the tank with proper fuel.
Open choke valve.
Clean or replace the air filter.
Contact an authorized service
workshop.
Replace the spark plug.
Check electrode gap and clean or
replace spark plug.
Contact an authorized service
workshop.
Contact an authorized service
workshop.
43

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