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TROUBLESHOOTING
43
Problem / Cause
Engine will not start
• Blade lever is engaged
• Steering controls are not locked in neutral position
• Driver is not sitting in driver’s seat
• Parking brake is not activated
• Battery is dead
• Contamination in carburetor or fuel line
• Fuel supply is closed or tap for fuel tank is in wrong position
• Clogged fuel filter or fuel line
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 used with warm engine
• Cylinder head bolts are loose
• Clogged fuel filter or jet
• Clogged ventilation valve on fuel cap
• Fuel tank nearly empty
• Fouled spark plug
• Spark plug is loose
• Defective ignition cable
• Defective spark plug electrode
• Defective spark plug connection
• Rich fuel mixture or fuel-air mixture
• Wrong fuel type
• Water in fuel
• Clogged air filter
Engine seems weak
• Clogged air filter
• Fouled spark plugs
• Carburetor incorrectly adjusted