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TROUBLESHOOTING
Trouble
Cause
Remedy
Engine
• Starts hard
• Does not start
Engine
Fuel at
carburettor
No fuel at
carburettor
• Fuel filter clogged
• Fuel line clogged
• Carburettor
• Clean or replace
• Clean
• Ask our Customer
Support Department
Fuel at
cylinder
No fuel at
cylinder
• Carburettor
• Ask our Customer
Support Department
Silencer wet
with fuel
• Fuel mixture is too rich
• Open choke
• Clean/replace air filter
• Adjust carburettor
• Ask our Customer
Support Department
Spark at
end of
plug wire
No spark at end
of plug wire
• Ignition switch off
• Electrical problem
• Turn switch on
• Ask our Customer
Support Department
Spark at
plug
No spark at
plug
• Spark gap incorrect
• Covered with carton
• Fouled with fuel
• Spark plug defective
• Adjust 0.6 to 0.7 mm
• Clean or replace
• Clean or replace
• Replace plug
Engine does not crank
• Internal engine problem
• Ask our Customer
Support Department
Engine runs
Dies or
accelerates
poorly
• Air filter dirty
• Fuel filter dirty
• Fuel vent plugged
• Spark plug
• Carburettor
• Cooling system plugged
• Exhaust port/silencer
plugged
• Clean or replace
• Clean or replace
• Clean
• Clean and adjust/replace
• Adjust
• Clean
• Clean
WARNING! ALL CHAINSAW SERVICE, OTHER THAN ITEMS LISTED IN
THE OWNER’S MANUAL SHOULD BE PERFORMED BY A COMPETENT
SERVICE PROFESSIONAL
BT-CS-40
