Brand: Husqvarna
Category: Lawn Mower
Manual Type:
Language:
Manual for Z 254 - Troubleshooting and error codes + PDF Download
Uploaded: April 8, 2025, 1:57 p.m.
Manual Publish Date: 2015-03-31
Warranty Summary
Using gasoline exceeding 10% ethanol (E10) will void the product warranty.
To Start Mowing:
- Sit on the seat and raise the mower deck to the highest position.
- Disengage mower blades by pressing the blade switch down.
- Move steering/park brake controls firmly outwards to the locked position.
- Move throttle lever to the full throttle position.
- Press in and turn the ignition key to the start position then release.
- Set engine speed with throttle and allow warm-up.
- Release park brake by pulling steering controls inwards.
- Engage mower deck by pulling the blade switch up.
- Lower mower deck to desired cutting height and begin mowing.
Troubleshooting and error codes
| Problem / Cause |
|---|
| Engine will not start Blade switch is engaged Steering controls are not locked in the outer position Battery is dead Contamination in the carburetor or fuel line Fuel supply shutoff valve is closed Clogged fuel filter or fuel line Ignition system faulty |
| Starter does not turn the engine over Battery is dead Poor contact of the battery terminal cable connections Blown fuse Fault in the starter safety circuit. See Safety System in the Maintenance Section Safety switches are not fully inserted |
| Engine runs rough Faulty carburetor Clogged fuel filter or jet Throttle lever in the Cold Weather starting position Clogged ventilation valve on the fuel cap Fuel tank nearly empty Fouled spark plugs Rich fuel mixture or fuel-air mixture. Wrong fuel type Water in fuel Clogged air filter |
| Engine seems weak Clogged air filter Fouled spark plugs Carburetor incorrectly adjusted Air trapped in hydraulic system |
| 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 Contamination in the carburetor or fuel line Fouled spark plugs |
| Battery not charging Poor contact of the battery terminal cable connections Charging lead is disconnected |
| Machine moves slowly, unevenly, or not at all Park brake on EZT Bypass linkages engaged Drive belt for the transmission is slack or has come off Air trapped in hydraulic system |
| Mower deck not engaging Drive belt for the mower deck has come loose Contact for the electromagnetic coupling has loosened Blade switch is faulty or has come loose from cable contact Blown fuse |
| Transaxle leaks oil Damaged seals, housing, or gaskets Air trapped in hydraulic system |
| Uneven mowing results Different air pressure in tires on the left and right sides. Bent blades Suspending for the mower deck is uneven Blades are dull Driving speed too high Grass is too long Grass collected under the mower deck |
Troubleshooting and error codes
| Problem / Cause |
|---|
| Engine will not start Blade switch is engaged Steering controls are not locked in the outer position Battery is dead Contamination in the carburetor or fuel line Fuel supply shutoff valve is closed Clogged fuel filter or fuel line Ignition system faulty |
| Starter does not turn the engine over Battery is dead Poor contact of the battery terminal cable connections Blown fuse Fault in the starter safety circuit. See Safety System in the Maintenance Section Safety switches are not fully inserted |
| Engine runs rough Faulty carburetor Clogged fuel filter or jet Throttle lever in the Cold Weather starting position Clogged ventilation valve on the fuel cap Fuel tank nearly empty Fouled spark plugs Rich fuel mixture or fuel-air mixture. Wrong fuel type Water in fuel Clogged air filter |
| Engine seems weak Clogged air filter Fouled spark plugs Carburetor incorrectly adjusted Air trapped in hydraulic system |
| 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 Contamination in the carburetor or fuel line Fouled spark plugs |
| Battery not charging Poor contact of the battery terminal cable connections Charging lead is disconnected |
| Machine moves slowly, unevenly, or not at all Park brake on EZT Bypass linkages engaged Drive belt for the transmission is slack or has come off Air trapped in hydraulic system |
| Mower deck not engaging Drive belt for the mower deck has come loose Contact for the electromagnetic coupling has loosened Blade switch is faulty or has come loose from cable contact Blown fuse |
| Transaxle leaks oil Damaged seals, housing, or gaskets Air trapped in hydraulic system |
| Uneven mowing results Different air pressure in tires on the left and right sides. Bent blades Suspending for the mower deck is uneven Blades are dull Driving speed too high Grass is too long Grass collected under the mower deck |