
tRoUbleshootIng gUIDe
50
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
• Choke control is pulled out with warm engine
• 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
• Wrong fuel type
• Water in the fuel
• Clogged air filter
Engine seems weak
• Clogged air filter
• Fouled spark plugs
• Carburetor incorrectly adjusted