Husqvarna M-ZT 52 Operation Manual - Page 50

TROUBLESHOOTING GUIDE, Problem, Cause

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TROUBLESHOOTING GUIDE Problem Engine will not start Cause • Blade switch is engaged • Steering controls are not locked in the neutral position • Parking brake is not activated • Battery is dead • Contamination in the carburetor or fuel line • Fuel supply is closed or the tap for the fuel tank is in the wrong position • Clogged fuel filter or fuel line • Faulty ignition system Starter does not turn the engine over • Dead battery • Poor contacts on the battery terminal cable connections • Fuse blown • Ignition system faulty • Fault in the starter safety circuit, see Safety System in the Maintenance section Engine runs rough • Faulty carburetor • Clogged fuel filter or jet • Clogged ventilation valve on the fuel cap • Fuel tank nearly empty • Fouled spark plug • Spark plug is loose • Rich fuel mixture or fuel-air mixture (gasoline) • Wrong fuel type (gasoline) • Water in the fuel (gasoline) • Clogged air filter Engine seems weak • Clogged air filter • Fouled spark plugs • Carburetor incorrectly adjusted 50

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50
TROUBLESHOOTING GUIDE
Problem
Cause
Engine will not start
•
Blade switch is engaged
•
Steering controls are not locked in the neutral position
•
Parking brake is not activated
•
Battery is dead
•
Contamination in the carburetor or fuel line
•
Fuel supply is closed or the tap for the fuel tank
is in the wrong position
•
Clogged fuel filter or fuel line
•
Faulty ignition system
Starter does not turn the engine over
•
Dead battery
•
Poor contacts on the battery terminal cable connections
•
Fuse blown
•
Ignition system faulty
•
Fault in the starter safety circuit, see
Safety
System
in the
Maintenance
section
Engine runs rough
•
Faulty carburetor
•
Clogged fuel filter or jet
•
Clogged ventilation valve on the fuel cap
•
Fuel tank nearly empty
•
Fouled spark plug
•
Spark plug is loose
•
Rich fuel mixture or fuel-air mixture (gasoline)
•
Wrong fuel type (gasoline)
•
Water in the fuel (gasoline)
•
Clogged air filter
Engine seems weak
•
Clogged air filter
•
Fouled spark plugs
•
Carburetor incorrectly adjusted