Husqvarna R120S Troubleshooting schedule, Problem, Cause, Engine does not start, engine

	Troubleshooting schedule
Problem		Cause
Engine does not start		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
Starter motor does not turn over the		Battery discharged
engine
		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
Engine does not run smoothly		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
Engine seems to have no power		Air filter clogged
		Spark plug defective
		Dirt in the carburetor or fuel line
		Carburettor incorrectly set
		Choking or incorrectly adjusted throttle cable
Engine overheats		Engine overloaded
		Spark plug defective
		Air intake or cooling flanges blocked
		Fan damaged
		Too little or no oil in engine
		Ignition defective
Battery does not charge		One or more battery cells faulty
		Poor contact on the battery terminal cable connectors
Machine vibrates		Blades are loose
		Engine is loose
		One or more blades unbalanced, caused by damage or poor balancing after
		sharpening
Uneven mowing		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

26 – English