Husqvarna iZ4217TSKAA, iZ4817TSKAA, iZ4821TSKAA, iZ5223TKOA, iZ5225TXPKOA, iZ6125TKOA, iZ5223TVAN Operator's Manual page 66

Problem
The engine seems weak.
The engine overheats.
Battery not charging.
The machine moves slowly, unevenly,
or not at all.
Mower deck not engaging.
Uneven mowing results.
The machine vibrates.
64
English-
TROUBLE SHOOTING GUIDE
Cause
• Clogged air filter.
• Defective spark plugs.
• Carburetor incorrectly adjusted.
• 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.
• Defective spark plugs.
• Pre-ignition incorrect.
• Poor contact with battery terminal cable
connectors.
• Parking brake on.
• Bypass valve on pump open.
• Drive belt for the pump slack or has come off.
• Defective hydraulic system.
• Air in the 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.
• Different air pressure in the tires on the left and
light sides.
• Bent blades.
• The chains for suspending the mower deck are
uneven.
• The chain fixture has come loose.
• The blades are blunt.
• 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.