Exmark 4501-191 Rev.A Servicing the Spark Plug, Removing the Spark Plug, Checking the Spark Plug

Page 34

Maintenance

and retain the hose. Wipe up any excess oil on the frame (Figure 25).

Note: Dispose of the used oil at a recycling center.

10.Apply a thin film of clean Exmark 4-Cycle Premium Engine Oil to the rubber gasket on the new filter.

11.Install the replacement oil filter to the mounting pad. Turn the oil filter clockwise until the rubber gasket contacts the pad, then tighten the filter an additional 1/2 to 3/4 turn.

12.Slowly pour approximately 80% of the specified oil into the filler tube—use oil recommended in the Checking the Oil Level section.

13.Install the oil fill cap/dipstick and push into place, but Do Not screw it in.

14.Check the oil level (Figure 24); refer to Checking the Oil Level section.

15.Slowly add additional oil to bring it to the full mark. Do Not overfill.

16.Install the oil fill cap/dipstick.

17.Start the engine and check for leaks.

Servicing the Spark Plug

Service Interval: Every 200 hours/Every 2 years (whichever comes first)

Every 500 hours—Replace the spark plug.

As stated in the maintenance intervals, remove the spark plug, check condition, and reset the gap or replace with a new plug as necessary.

The spark plug is RFI compliant. Equivalent alternate brand plugs can also be used.

Type: NGK BPR4ES (or equivalent)

Air Gap: 0.030 inch (0.76 mm)

Removing the Spark Plug

1.Disengage the blade control switch, move the motion controls outward to the park position, stop the engine, and remove the key.

2.Pull the wire off of the spark plug (Figure 26). Clean around the spark plug to prevent dirt from falling into the engine and potentially causing damage.

Note: Due to the deep recess around the spark plug, blowing out the cavity with compressed air is usually the most effective method for cleaning. The spark plug is most accessible when the blower housing is removed for cleaning.

3. Remove the spark plug and metal washer.

Figure 26

1.Spark plug and wire location

Checking the Spark Plug

1.Look at the center of the spark plug (Figure 27). If you see light brown or gray on the insulator, the engine is operating properly. A black coating on the insulator usually means the air cleaner is dirty.

Important: Never clean the spark plug. Always replace the spark plug when it has a black coating, worn electrodes, an oily film, or cracks.

2.Check the gap between the center and side electrodes (Figure 27). Bend the side electrode if the gap is not correct.

Figure 27

1. Side electrode

3. Air gap (not to scale)

2.Center electrode insulator

Installing the Spark Plug

1.Install the spark plug. Make sure that the air gap is set correctly.

2.Tighten the spark plug to 16 ft-lb (22 N-m).

3.Push the wire onto the spark plug (Figure 26).

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Contents Quest California Introduction Contents Safe Operating Practices SafetySafety Alert Symbol General OperationChildren ServiceSlope Operation TowingExmark Riding Mower Safety General ServiceSafety Safety and Instructional Decals 106-8717119-8814 PTO Switch Symbols 116-4220 120-2239 Model Numbers SpecificationsSystems Dimensions Product Overview Torque RequirementsOperation ControlsHeight-of-Cut Foot Lever Think Safety FirstOperating Instructions Fuel WindowUsing Stabilizer/Conditioner Recommended GasolineStarting the Engine Checking the Engine Oil LevelFilling the Fuel Tank Engaging the Blades Operating the BladesStopping the Engine Disengaging the BladesTesting the Safety Interlock System Safety Interlock SystemUnderstanding the Safety Interlock System Driving Forward or BackwardBackward Adjusting the Anti-Scalp Rollers Adjusting the Height of CutStopping the Machine Positioning the Seat Inch DeckChanging the Seat Ride Suspension Adjusting the Motion Control LeversPushing the Machine by Hand To Operate the Machine Side DischargeTransporting Transporting a UnitOperating Tips Blade Maintenance When StoppingKeep the Underside of the Mower Clean Long GrassMaintenance Recommended Maintenance SchedulesLubrication Raising the SeatGreasing the Bearings Cleaning the Element Engine MaintenanceServicing the Air Cleaner Servicing the Engine OilChanging the Oil and Filter Removing the Spark Plug Installing the Spark PlugServicing the Spark Plug Checking the Spark PlugServicing the Emissions Filter Cleaning the Blower HousingFuel System Maintenance Replacing the Fuel FilterCharging the Battery Electrical System MaintenanceRemoving the Battery Checking the Battery Charge Recommended Jump Starting ProcedureInstalling the Battery Do Not jump start a weak battery if these conditions existReleasing the Electric Brake Drive System Maintenance Checking the Tire PressureServicing the Fuses Checking the Hydraulic Oil LevelChanging the Hydraulic System Filter and Oil Removing Hydraulic System FiltersInstalling the Hydraulic System Filters Before Inspecting or Servicing the Blades Mower Maintenance Servicing the Cutting BladesBleeding the Hydraulic System Inspecting the BladesChecking for Bent Blades Measure from the tip of the blade to the flat surface hereRemoving the Blades Sharpening the BladesLeveling the Mower Deck Installing the BladesSide-to-Side Leveling Blades side to side Adjusting the Front-to-Rear Blade Slope Inspecting the Belts Mower Belt MaintenanceRemoving the Mower Replacing the Mower BeltInstalling the Mower Replacing the Discharge DeflectorRod Deck brackets Spring Clean Engine and Exhaust System Area Washing the Underside of the MowerCleaning and Storage StorageTroubleshooting Problem Possible Cause Corrective ActionTo Pushing the Machine by Hand Schematics Electrical DiagramElectrical Logic Schematic Exmark Quest Turf Equipment Page Page Service Record Date Description of Work Done Service Done ByPage This page may be copied for personal use Exmark Accessories and Options

4501-191 Rev.A specifications

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