Husqvarna Z4818BIA/968999250 manual Ignition System

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MAINTENANCE

9.Connect BLACK grounding cable to negative (-) battery terminal with remaining hex bolt and hex nut.

10.Tighten securely.

11.Close terminal access doors.

12.Lower seat.

Ignition System

The engine is equipped with an electronic ignition system. Only the spark plugs require maintenance.

For recommended spark plugs, see Technical Data.

1.Remove the ignition cable boot and clean around the spark plug.

2.Remove the spark plug with a spark plug socket wrench.

3.Check the spark plug. Replace the spark plug if fouled, the electrodes are burned and if the insulation is cracked or damaged. Clean the spark plug with a steel brush if it is to be reused.

4.Measure the electrode gap with a gapping tool. The gap should be .030” (0.75 mm). Adjust as necessary by bending the side electrode.

5.Reinsert the spark plug, turning by hand to avoid damaging the threads.

6.After the spark plug is seated, tighten it using a spark plug wrench so that the washer is compressed. A used spark plug should be turned 1/8 of a turn from the seated position. A new spark plug should be turned 1/4 a turn from the seated position.

7.Replace the ignition cable.

IMPORTANT INFORMATION

Fitting the wrong spark plug type can damage the engine.

Inadequately tightened spark plugs can cause overheating and damage the engine. Tightening the spark plugs too hard can damage the threads in the cylinder head.

8011-054

Measure the electrode gap

English-38

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Contents Z4818BIA/968999250 Page OPERATOR’S Manual Rider English-2 Introduction IntroductionGood Service Manufacturing NumberSymbols and Decals Symbols and DecalsXxxxxxx xxxx xxxxxxxx xxx Xxxx xxxxxx Greater Than Careful Safety Instructions Safety InstructionsGeneral Use Hearing Do as follows Driving on SlopesDo not Children Maintenance Poisonous, and lethal gas Use protective glasses for maintenance work TransportCustomer responsibilities Controls Control LocationsTension Relief Lever Parking BrakeMotion Control Levers TrackingSeat adjustment knobs Fuel Shut Off ValveRefueling By pass linkage FusesHour Meter Ignition SwitchChoke Control Blade switch Throttle ControlAccessories Cutting height pedalOperation OperationTraining Before Starting Starting the EngineDepress the control for disengaging the mower deck Set the choke control USE Full Throttle When Mowing To start an engine with a weak battery To remove cables, reverse orderRunning Operating on hills Mowing Tips Stopping the Engine Moving by Hand Maintenance MaintenanceMaintenance Schedule = Described in this manual  = Not described in this manua To clean battery and terminals BatteryReplacing battery Ignition System Checking the Safety System Checking and Adjusting the Choke Cable Checking and Adjusting the Throttle CableChecking the Engines Cooling Air Intake Replacing the Air Filter Standard air filterChecking the Fuel Pump’s Air Filter Replacing the Fuel FilterChecking Tire Pressures Faulty adjustment can cause an accident Checking the Parking BrakeChecking the V-belts Deck beltDeck belt installation Belt installation IZT beltTo replace IZT Integraded Zeroturn Transaxle belt IZT belt removalAlways use protective gloves when handling the blades Checking the BladesRemove blade bolt by turning counterclockwise Adjusting the Mower Deck Side-to-side adjustment To level deckFront-to-back adjustment To adjust anti-scalp rollers Cleaning and Washing Use protective glasses when cleaning and washingRemoval and installation of caster wheel Caster WheelsTracking adjustment To adjust parking brakeParking brake Mower is tracking to the rightLubrication LubricationLubrication Schedule Lubricating the Cables Lubricating in Accordance with the Lubrication ScheduleFront Wheel Mount Front Wheel BearingsDeck outer spindle Engine Oil Changing the Engine OilChecking the Oil Level Changing the Oil Filter TransmissionTrouble Shooting Guide Trouble Shooting GuideProblem Cause Water in the fuel English-61 Service StorageStorage Winter StorageWiring Diagrams Wiring diagramTechnical Data Technical DataZ4818BIA Productivity Accessories Torque SpecificationsConformity Certificates USA requirementsService Journal Service JournalDelivery Service Action Date, mtr reading, stamp, signAfter the First 5-8 Hours Hour Service English-71 English-72 English-73 At Least Once Each Year English-75 109797R0108/10/05