38
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
Engine seems weak
Clogged air filter
Fouled spark plugs.
Carburetor incorrectly adjusted
Machine vibrates.
Blades are loose.
Blades are incorrectly balanced.
Engine is loose.
Engine overheats.
Clogged air intake or cooling fins.
Engine overloaded.
Poor ventilation around engine.
Defective engine speed regulator.
Too little or no oil in the engine.
Fouled spark plug.
Battery not charging.
Poor contact with battery terminal cable
connectors.
Charging lead is disconnected.
Machine moves slowly, unevenly, or not at all.
Parking brake on.
Bypass valve on pump open.
Drive belt for the transmission has slack or has
come off.
Air in hydraulic system.
Mower deck not engaging.
Drive belt for the mower deck has come loose.
Electric connection to clutch has loosened.
Blade switch is faulty or has come loose from
the cable contact.
Fuse has blown.
Hydraulic drive leaks oil.
Damaged seals, housing, or gaskets.
Air trapped in hydraulic system.
Uneven mowing results.
Unequal tire pressure on the left and right
sides.
Bent blades.
Suspension for the mower deck is uneven.
Blades are dull.
Driving speed too high.
Grass is too long.
Grass collected under the mower deck.