Husqvarna W21K, W21SK, W21SBK, W53SBEK, W53SEK, W21KC, W21SKC, W21SBKC General Recommendations

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MAINTENANCE

General Recommendations

The warranty on this lawn mower does not cover items that have been subjected to operator abuse or negligence. To receive full value from the warranty, operator must maintain mower as instructed in this manual.

Some adjustments will need to be made periodically to properly maintain your unit.

At least once a season, check to see if you should make any of the adjustments described in this Maintenance section.

•At least once a year, replace the spark plug, clean or replace air filter element and check blade for wear. A new spark plug and clean/new air filter element assure proper air-fuel mixture and help your engine run better and last longer.

•Follow the maintenance schedule in this manual.

Before Each Use

1.Check engine oil level.

2.Check for loose fasteners.

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

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-31

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Contents Operators Manual OPERATOR’S Manual Push Mower Safety InstructionsIntroduction Introduction Introduction Good Service Manufacturing NumberSymbols and Decals Symbols and DecalsXxxxxxx xxxx xxxxxxxx xxx Xxxx xxxxxx Distance from Safety Instructions Safety InstructionsGeneral Use Keep children away from the work area Do as follows Operating on SlopesDo not Maintenance ChildrenNever fill the fuel tank indoors Transport Customer responsibilities Controls ControlsFuel Shut Off Valve Engine SpeedOperator Presence Control OPC Choke Control All Models USE Full Throttle When MOWING, for best mower performanceThrottle Control All Models Blade Brake Control BBC Cutting height Ground Drive BailShut Off Engine To Convert Mower To Empty Grass CatcherEnglish-20 Operation Before Starting EngineTo Start Engine Transmission Selector MowingBlade in short cut grass or over a hard level Release OPC bail Self Propelled Models Only Set throttle control to high speed Push Models Only Mowing Tips Mulching Mowing Tips Maintenance MaintenanceMaintenance Schedule Before Each Use General RecommendationsIgnition System Checking the Engines Cooling Air Intake Checking and Adjusting the Throttle Cable and Choke Cable Replacing Air Filter InspectionChecking Tires Replacing the Fuel FilterDrive Wheels Checking the V-belts Always use protective gloves when handling the bladeChecking the Blade Blade replacement Gear CaseGrass Catcher CleaningClean Under Drive Cover MufflerRear Deflector Adjusting the Lawn MowerTo Adjust Handle To Remove Drive BeltCleaning and Washing Engine AdjustmentHardware English-41 Lubrication Mower Lubrication ChartLubrication Engine LubricationTo Change Engine Oil Changing the Oil Filter Trouble Shooting Guide Trouble Shooting GuideProblem Cause English-45 112280 R2 03/06/07
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