21 TROUBLESHOOTING 98
Faults Possible cause Action
The engine cannot be cranked (elec-
tric starter)
Operating error – Carry out the start procedure. ( p. 28)
Battery is discharged – Charge the battery. x ( p. 80)
– Check the charging voltage. x
– Check the closed current. x
– Check the stator winding of the alternator. x
Main fuse blown – Change the main fuse. ( p. 81)
Starter relay defective – Check the starter relay. x
Starter motor defective – Check the starter motor. x
Engine turns but does not start Operating error – Carry out the start procedure. ( p. 28)
Coupling of fuel hose connection not
joined together
– Join the fuel hose connection.
Fuse 1 blown – Change the fuses of individual power
consumers. ( p. 81)
Fuse 2 blown – Change the fuses of individual power
consumers. ( p. 81)
Idle speed is not set correctly – Adjust the idle speed. x ( p. 90)
Spark plug oily or wet – Clean and dry the spark plug or replace if nec-
essary.
Electrode distance (plug gap) of spark
plug too wide
– Adjust the plug gap.
Guideline
Spark plug electrode gap
0.8 mm (0.031 in)
Ignition system defective – Check the ignition system. x
Short-circuit cable in wiring harness
frayed, kill switch or emergency OFF
switch defective
– Check the wiring harness. (visual check)
– Check the electrical system.
Defect in fuel injection system – Read out the fault memory using the Husqvarna
diagnostics tool. x
Engine does not speed up Defect in fuel injection system – Read out the fault memory using the Husqvarna
diagnostics tool. x
Ignition system defective – Ignition coil - check the secondary winding. x
– Check the spark plug connector. x
– Check the stator winding of the alternator. x
Engine has too little power Air filter heavily contaminated – Clean the air filter and air filter box. x ( p. 51)
Fuel filter is very dirty – Change the fuel filter. x
Fuel screen is very dirty – Change the fuel screen. x ( p. 91)
Defect in fuel injection system – Read out the fault memory using the Husqvarna
diagnostics tool. x
Exhaust system leaky, deformed or
too little glass fiber yarn filling in main
silencer
– Check exhaust system for damage.
– Change the glass fiber yarn filling of the main
silencer. x ( p. 54)
Valve clearance too little – Adjust the valve clearance. x
Ignition system defective – Ignition coil - check the secondary winding. x
– Check the spark plug connector. x
– Check the stator winding of the alternator. x
Engine dies during the trip Lack of fuel – Refuel. ( p. 31)
Fuse 1 blown – Change the fuses of individual power
consumers. ( p. 81)
Fuse 2 blown – Change the fuses of individual power
consumers. ( p. 81)
Engine overheats Coolant level low in cooling system – Check the cooling system for leaks.
– Check the coolant level. ( p. 87)
Insufficient airflow – Switch off engine when stationary.
Radiator fins very dirty – Clean radiator fins.
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