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TROUBLESHOOTING GUIDE
The engine seems weak.
• Clogged air lter.
• Fouled spark plugs.
• Carburetor incorrectly adjusted.
• Air trapped in hydraulic system.
Problem
Cause
The engine will not start.
• The blade switch is engaged.
• Steering controls are not locked in the neutral position.
• The driver is not sitting in the driver’s seat.
• The parking brake is not activated.
• The battery is dead.
• Contamination in the carburetor or fuel line.
• The fuel supply is closed or the shut-off valve for the fuel
tank is in the wrong position.
• Clogged fuel lter or fuel line.
The 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 Checking the Safety
System in the “Maintenance Section”
The engine runs rough.
• Faulty carburetor.
• The choke control is pulled out with a warm engine.
• Defective valves.
• The cylinder head bolts are loose.
• Clogged fuel lter or jet.
• Clogged ventilation valve on the fuel cap.
• Fuel tank nearly empty.
• Fouled spark plugs.
• The spark plugs are loose.
• Defective spark plug electrode.
• Defective spark plug connection.
• Rich fuel mixture or fuel-air mixture.
• Wrong fuel type.
• Water in the fuel.
• Clogged air lter.
• Air trapped in hydraulic system.