Troubleshooting Guide - Husqvarna MZ5424SR CA Operator's Manual

Problem
Engine will not start
Starter does not turn the engine over
Engine runs rough
Engine seems weak
50
TROUBLESHOOTING
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
• Clogged fuel filter or fuel line
• Faulty ignition system
• 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
• 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
• Water in the fuel
• Clogged air filter
• Clogged air filter
• Fouled spark plugs
• Carburetor incorrectly adjusted