Troubleshooting - Husqvarna DT18BF Operator's Manual

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Symptom
Engine will not start
User error
Fuel system
Spark plug
No spark after checking spark plug Faulty engine switch, cable or
Low compression
Engine is under-powered or runs
unevenly
Air filter
Fuel system
Blue or voluminous
blue-white exhaust
Black exhaust
Ignition system
Low compression
28

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.
Build-up on electrodes. Short
circuit.
Gasoline or oil on the spark plug.
ignition.
Serious interior engine damage or
faulty valves.
Clogged air filter
Machine stored without observing
proper procedure from chapter
"Storage/Winter storage"
Contaminated or incorrect fuel
Choke left on
Clogged air filter
Carburetor problems
Wrong spark plug type
Build-up on electrodes. Short
circuit.
Faulty ignition unit.
Serious interior engine damage or
faulty valves.
Action
open the fuel valve.
Close the choke with cold engine.
Turn the engine switch to oN
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.
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
fresh 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.

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