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21
TROUBLESHOOTING
Faults
The engine cannot be cranked (elec-
tric starter)
Engine turns but does not start
Engine does not speed up
Engine has too little power
Engine dies during the trip
Engine overheats
Possible cause
Operating error
Battery is discharged
Main fuse blown
Starter relay defective
Starter motor defective
Operating error
Coupling of fuel hose connection not
joined together
Fuse 1 blown
Fuse 2 blown
Idle speed is not set correctly
Spark plug oily or wet
Electrode distance (plug gap) of spark
plug too wide
Ignition system defective
Short-circuit cable in wiring harness
frayed, kill switch or emergency OFF
switch defective
Defect in fuel injection system
Defect in fuel injection system
Ignition system defective
Air filter heavily contaminated
Fuel filter is very dirty
Fuel screen is very dirty
Defect in fuel injection system
Exhaust system leaky, deformed or
too little glass fiber yarn filling in main
silencer
Valve clearance too little
Ignition system defective
Lack of fuel
Fuse 1 blown
Fuse 2 blown
Coolant level low in cooling system
Insufficient airflow
Radiator fins very dirty
Action
–
Carry out the start procedure. (
–
Charge the battery.
(
x
–
Check the charging voltage.
–
Check the closed current.
–
Check the stator winding of the alternator.
–
Change the main fuse. (
–
Check the starter relay.
–
Check the starter motor.
–
Carry out the start procedure. (
–
Join the fuel hose connection.
–
Change the fuses of individual power
consumers. (
p. 81)
–
Change the fuses of individual power
consumers. (
p. 81)
–
Adjust the idle speed.
x
–
Clean and dry the spark plug or replace if nec-
essary.
–
Adjust the plug gap.
Guideline
Spark plug electrode gap
0.9 mm (0.035 in)
–
Check the ignition system.
–
Check the wiring harness. (visual check)
–
Check the electrical system.
–
Read out the fault memory using the Husqvarna
diagnostics tool.
x
–
Read out the fault memory using the Husqvarna
diagnostics tool.
x
–
Ignition coil - check the secondary winding.
–
Check the spark plug connector.
–
Check the stator winding of the alternator.
–
Clean the air filter and air filter box.
–
Change the fuel filter.
x
–
Change the fuel screen.
–
Read out the fault memory using the Husqvarna
diagnostics tool.
x
–
Check exhaust system for damage.
–
Change the glass fiber yarn filling of the main
silencer.
(
p. 54)
x
–
Adjust the valve clearance.
–
Ignition coil - check the secondary winding.
–
Check the spark plug connector.
–
Check the stator winding of the alternator.
–
Refuel. (
p. 31)
–
Change the fuses of individual power
consumers. (
p. 81)
–
Change the fuses of individual power
consumers. (
p. 81)
–
Check the cooling system for leaks.
–
Check the coolant level. (
–
Switch off engine when stationary.
–
Clean radiator fins.
98
p. 28)
p. 80)
x
x
x
p. 81)
x
x
p. 28)
(
p. 90)
x
x
x
x
(
p. 51)
x
(
p. 91)
x
x
x
x
x
p. 87)
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