HTC Z4220 Lawn Mower User Manual


 
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TROUBLESHOOTING GUIDE
The engine seems weak. Clogged air lter.
Defective spark plugs.
Carburetor incorrectly adjusted.
The engine overheats. Clogged air intake or cooling ns.
Engine overloaded.
Poor ventilation around engine.
Defective engine speed regulator.
Soot in the combustion chamber.
Too little or no oil in the engine.
Defective spark plug.
Pre-ignition incorrect.
Battery not charging. Poor contact with battery terminal cable
connectors.
The machine moves slowly, unevenly, or not at all. Parking brake on.
Bypass valve on pump open.
Drive belt for the transmission gears slack or has
come off.
Mower deck not engaging. Drive belt for the mower deck has come loose.
Contact for the electromagnetic coupling has
loosened.
The blade switch is faulty or has come loose, from
the cable contact.
The fuse has blown.
Transaxle leaks oil. Damaged seals, housing, or gaskets.
Air trapped in hydraulic system.
Uneven mowing results. Different air pressure in the tires on the left and
right sides.
Bent blades.
The suspension for the mower deck is uneven.
The blades are dull.
Driving speed too high.
The grass is too long.
Grass collected under the mower deck.
The machine vibrates. The blades are loose.
The blades are incorrectly balanced.
The engine is loose.
Problem
Cause