Husqvarna sets this out as a table with the columns “Problem”, “Cause”. We print the lines in the maker’s order.

• Engine does not start.
• The drive of the blades is engaged. Refer to PTO (Power Take-Off) button on page 4.
• Steering controls are not locked in the parking brake position.
• The battery is too weak. Refer to To charge the battery on page 19.
• There is dirt in the fuel line.
• The shut-off valve of fuel supply is closed or in the incorrect position.
• The fuel filter or fuel line is clogged.
• The ignition system is damaged.
• The starter motor does not turn the engine over.
• The battery is too weak. Refer to To charge the battery on page 19.
• The connection at the cable connectors on the battery terminals is bad.
• Refer to To clean the battery on page 18.
• A fuse is blown. Refer to Fuses on page 5.
• The OPC does not operate correctly. Refer to Operation conditions on page 9.
• The engine does not run smoothly.
• The fuel filter or fuel jet is clogged.
• The check valve on the fuel tank cap is clogged.
• The fuel tank is almost empty.
• The spark plug is damaged.
• Incorrect fuel mix or fuel type.
• There is water in the fuel.
• The air filter is clogged.
• The engine apparently has no power.
• The air filter is clogged.
• The spark plug is damaged.
• There is air in the hydraulic system.
• There is vibration in the product.
• The blades are loose. Refer to To examine the blades on page 22.
• One or more of the blades are not balanced. Refer to Throttle control on page 4.
• The engine is loose.
• The engine becomes too hot.
• The air filter or the cooling fins are clogged.
• There is overload in the engine.
• The airflow around the engine is not sufficient.
• The engine speed regulator is damaged.
• The oil level is too low.
• There is dirt in the fuel line.
• The spark plug is damaged.
• The battery does not charge.
• The connection at the cable connectors on the battery terminals is bad.
• Refer to To clean the battery on page 18.
• The charging lead is disconnected.
• The charging system does not operate correctly.
• The product moves slowly, with irregular speed or not at all.
• The parking brake is engaged.
• The hydraulic release lever is engaged.
• The drive belt on the transmission is loose or damaged.
• There is air in the hydraulic system.
• The drive of the blades do not engage.
• The drive belt on the mower deck is loose.
• The electromagnetic coupling contact is loose.
• A fuse is blown. Refer to Fuses on page 5.
• The transaxle leaks oil.
• The seals, housing or gaskets are damaged.
• There is air in the hydraulic system.
• The cutting result is unsatisfactory.
• The tire pressure is different on the right and left sides. Refer to Tire pressure on page 20.
• The blades are damaged.
• The suspension of the cutting deck is not level.
• The blades are blunt. Refer to To examine the blades on page 22.
• The product is operated at too high forward or rearward speed. Refer to To get a good cutting result on page 15.
• The grass is long or wet. Refer to To get a good cutting result on page 15.
• There is grass blockage in the cutting deck. Refer to To clean the product on page 18.