Husqvarna R 120S Owners Manual - Page 26

Troubleshooting schedule Problem Engine does not start Starter motor does not turn over the engine Engine does not run smoothly Engine seems to have no power Engine overheats Battery does not charge Machine vibrates Uneven mowing 26 - English Cause There is no fuel in the fuel tank Spark plug defective Faulty spark plug connections or interchanged cables Dirt in the carburetor or fuel line Starter motor does not turn over the engine Battery discharged Bad contact between the cable and battery Lift lever for cutting unit in wrong position Main fuse blown. Ignition lock faulty Brake not activated. Faulty starter motor Faulty spark plug. Carburettor incorrectly set Air filter clogged Fuel tank vent blocked Ignition key defective Dirt in the carburetor or fuel line Choking or incorrectly adjusted throttle cable Air filter clogged Spark plug defective Dirt in the carburetor or fuel line Carburettor incorrectly set Choking or incorrectly adjusted throttle cable Engine overloaded Spark plug defective Air intake or cooling flanges blocked Fan damaged Too little or no oil in engine Ignition defective One or more battery cells faulty Poor contact on the battery terminal cable connectors Blades are loose Engine is loose One or more blades unbalanced, caused by damage or poor balancing after sharpening Blades blunt Long or wet grass Cutting unit skew Grass blockage under hood Different tyre pressures on right and left sides Over-speeding Engine speed too low Drive belt slipping