Troubleshooting - Husqvarna MZ25 / 968999780 Operator's Manual

Problem
The engine will not start.
The starter does not turn the engine over.
The engine runs rough.
The engine seems weak.
The machine vibrates.

TROUBlESHOOTING

Cause
• Blade switch is engaged.
• Steering controls are not locked in the neutral
position.
• Driver is not sitting in the driver's seat.
• Parking brake is not activated.
• Battery is dead.
• Contamination in the carburetor or fuel line.
• Fuel supply is closed or the shutoff valve for the
fuel tank is in the wrong position.
• Clogged fuel filter or fuel line.
• Ignition system faulty.
• Dead battery.
• Poor contact of the battery terminal cable
connections.
• Blown fuse.
• Fault in the starter safety circuit.
See Checking the Safety System in the
"Maintenance Section"
• Faulty carburetor.
• Choke control is pulled out with a warm engine.
• Clogged fuel filter or jet.
• Clogged ventilation valve on the fuel cap.
• Fuel tank nearly empty.
• Fouled spark plugs.
• Rich fuel mixture or fuel-air mixture.
• Wrong fuel type.
• Water in the fuel.
• Clogged air filter.
• Clogged air filter.
• Fouled spark plugs.
• Carburetor incorrectly adjusted.
• Air trapped in hydraulic system.
• The blades are loose.
• The blades are incorrectly balanced.
• The engine is loose.
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