Yazoo/Kees ZMKH52252, ZMKW52212, ZMKH61252, ZMKW48192, ZMKW48172 trouble shooting, Problem, Cause

trouble shooting

Problem Cause

The engine will not start.

•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 shut-off valve for the fuel tank is in the wrong position.

•Clogged fuel filter 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.
	• Choke control is pulled out with a warm engine.
	•	Defective valves.
	• Defective piston, cylinder, piston ring, or cylinder head seal.
	• Cylinder head bolts are loose.
	• Clogged fuel filter or jet.
	• Clogged ventilation valve on the 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 the fuel.
	•	Clogged air filter.
	• Air trapped in hydraulic system.
The engine seems weak.	•	Clogged air filter.
	•	Defective spark plugs.
	•	Carburetor incorrectly adjusted.
The engine seems weak.	•	Clogged air filter.
	•	Fouled spark plugs.
	•	Carburetor incorrectly adjusted.
Battery not charging.	•	Poor contact with battery terminal cable connectors.

English-48