TROUBLESHOOTING
38
PROBLEM CAUSE ACTION
Engine will not start
User error Fuel valve closed
Choke valve open
Engine switch in OFF position
Open the fuel valve
Close the choke with cold engine
Turn the engine switch to ON
Fuel system Fuel tank empty
Machine stored without observing
proper procedure from chapter
“Storage/Winter storage”
Contamination, water or ice in fuel
system
Carburetor problems
Fill with fuel
Clean tank, sludge reservoir and
empty carburetor Fill the tank with
fresh fuel
Clean tank, sludge reservoir and
empty carburetor Fill the tank with
fresh fuel
Contact an authorized service
workshop
Spark plug Wrong spark plug type
Build-up on electrodes Short circuit
Gasoline or oil on the spark plug
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
No spark after checking spark plug Faulty engine switch, cable or
ignition
Contact an authorized service
workshop
Low compression Serious interior engine damage or
faulty valves
Contact an authorized service
workshop
Engine is weak or runs unevenly
Air filter Clogged air filter Clean or replace the air filter
Fuel system Machine stored without observing
proper procedure from chapter
“Storage/Winter storage”
Clean tank, sludge reservoir and
empty carburetor Fill the tank with
fresh fuel
Blue or voluminous
blue-white exhaust
Contaminated or incorrect fuel Clean tank, sludge reservoir and
empty carburetor Fill the tank with
proper fuel
Black exhaust Choke left on
Clogged air filter
Carburetor problems
Open choke valve
Clean or replace the air filter
Contact an authorized service
workshop
Ignition system Wrong spark plug type
Build-up on electrodes Short circuit
Faulty ignition unit
Replace the spark plug
Check electrode gap and clean or
replace spark plug
Contact an authorized service
workshop
Low compression Serious interior engine damage or
faulty valves
Contact an authorized service
workshop
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