Husqvarna MZ6128ZT / 966613101, MZ5225ZT / 966690501 manual Troubleshooting guide, Problem Cause

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troubleshooting guide

Problem

Cause

 

 

 

Engine will not start.

Blade switch is engaged.

 

• Steering controls are not locked in the neutral

 

 

position.

 

• Parking brake is not activated.

 

Battery is dead.

 

• Contamination in the carburetor or fuel line.

 

• Fuel supply is closed.

 

• Clogged fuel filter or fuel line.

 

Faulty ignition system.

 

 

 

Starter does not turn the engine over.

Dead battery.

 

• Poor contacts on the battery terminal cable

 

 

connections.

 

Fuse blown.

 

Ignition system faulty.

 

• Fault in the starter safety circuit. See Safety

 

 

System in the Maintenance section

 

 

 

Engine runs rough.

Faulty carburetor.

 

• Clogged fuel filter or jet.

 

• Clogged ventilation valve on the fuel cap.

 

• Fuel tank nearly empty.

 

Fouled spark plug.

 

• Spark plug is loose.

 

• Rich fuel mixture or fuel-air mixture.

 

Wrong fuel type.

 

• Water in the fuel.

 

Clogged air filter.

 

 

 

Engine seems weak.

Clogged air filter.

 

Fouled spark plugs.

 

Carburetor incorrectly adjusted.

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Contents Operator Manual All rights reserved Contents Page Introduction Good Service Manufacturing NumberSymbols and decals Manual Performing any Safety Safety InstructionsGeneral Operation Never take passengers Personal Safety Equipment Slope OperationChildren Safe Handling of Gasoline General Maintenance Risk of sparking Transport Spark ArrestorControls Control LocationsMotion Control Levers Hour Meter Choke ControlTracking Knob Model MZ5225ZT onlyBlade Switch Ignition SwitchParking Brake Fuses Cutting Height Adjuster Seat Adjustment LeverFuel Shut Off Valve Fuel Tank Hydro Release LeversOperation TrainingSteering Before Starting Starting the EngineMove the throttle to the middle position Open the fuel tank valve Weak Battery Jumper CablesTo remove cables, reverse order Ensure that no one is near mower when engaging blade switch RunningOperating on Hills Stopping the Engine Mowing Tips Manual Transport Maintenance Maintenance Battery Replacing batterySafety System Tire PressuresDeck Belt Installation Deck BeltDeck Belt Removal Belt Installation Pump BeltBelts Replacing Pump BeltCutting Blades Adjusting the Mower Deck Leveling deckAnti-scalp rollers Cleaning Use protective glasses when cleaning and washingCaster Wheels HardwareLubrication Lubrication ScheduleGeneral Wheel and Deck Zerks Front Wheel MountFront Wheel Bearings Deck SpindlesTransaxle Transmission Fluid Change Purging Procedures Troubleshooting guide Problem CauseTroubleshooting guide Service StorageWinter Storage Engine Pigtail PUR WHT GRY Technical Data MZ5225ZT MZ6128 ZTFrame Torque Specifications Hex Head Cap ScrewsStandard Hardware Metric Standard HardwareConformity certificates USA requirementsService Journal Delivery ServiceAction Stamp, signAfter 10 hours Date, mtr reading Stamp, signDaily Service Hour Service Service Journal Service Journal At least once each year Page 115 390127R1 08/31/10