Husqvarna 968999657 Operator's Manual page 63

Problem
The engine overheats.
Battery not charging.
The machine moves slowly, unevenly, or not at all.
Mower deck not engaging.
Transaxle leaks oil.
Uneven mowing results.
The machine vibrates.
TROUBLESHOOTING GUIDE
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Cause
Clogged air intake or cooling fins.
Engine overloaded.
Poor ventilation around engine.
Defective engine speed regulator.
Soot in the combustion chamber.
Too little or no oil in the engine.
Fouled spark plugs.
Air trapped in hydraulic system.
Poor contact with battery terminal cable connectors.
Parking brake on.
Bypass valve on pump open.
Belt for the transmission gears slack or has come off.
Air trapped in hydraulic system.
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.
Damaged seals, housing, or gaskets.
Air trapped in hydraulic system.
Different air pressure in the tires on the left and right sides.
Bent blades.
The suspending for the mower deck is uneven.
The chain fixture has come loose.
The blades are dull.
Driving speed too high.
The grass is too long.
Grass collected under the mower deck.
The blades are loose.
The blades are incorrectly balanced.
The engine is loose.
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English