Exmark 4500-450 Cleaning the Blower Housing, Removing the Spark Plug, Checking the Spark Plug

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Maintenance

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: Champion XC92YC

Champion RC12YC or QC12C may be used if your area does not require compliance with Canadian ICES-002, ISO 14982, or EN 55012.

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 25). 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 25

1.Spark plug and wire location

Checking the Spark Plug

1.Look at the center of the spark plug (Figure 26). 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 26). Bend the side electrode if the gap is not correct.

Figure 26

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 15 ft-lb (20 N-m).

3.Push the wire onto the spark plug (Figure 25).

Cleaning the Blower Housing

Service Interval: Every 100 hours/Yearly (whichever comes first) More often under dirty conditions.

To ensure proper cooling, make sure the grass screen, cooling fins, and other external surfaces of the engine are kept clean at all times.

1.Remove the blower housing and any other cooling shrouds.

2.Clean the cooling fins and external surfaces as necessary.

3.Make sure the cooling shrouds are reinstalled

Important: Operating the engine with a blocked grass screen, dirty or plugged cooling fins, and/or cooling shrouds removed, will cause engine damage due to overheating.

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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 and Instructional Decals 93-7009109-6035 116-0532 PTO Symbols 109-8965 Model Numbers SpecificationsSystems Dimensions Product Overview Torque RequirementsOperation ControlsParking Brake Lever Think Safety FirstOperating Instructions Height-of-Cut Foot LeverRecommended Gasoline Starting the Engine Using Stabilizer/ConditionerChecking the Engine Oil Level Gasoline/Alcohol blendsEngaging the Blades Operating the BladesStopping the Engine Disengaging the BladesTesting the Safety Interlock System Safety Interlock SystemUnderstanding the Safety Interlock System Driving Forward or BackwardForward Adjusting the Height of CutStopping the Machine BackwardGround. Do Not adjust rollers to support the deck Adjusting the Anti-Scalp RollersPositioning the Seat Changing 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 Cutting SpeedMaintenance Recommended Maintenance SchedulesLubrication Accessing the BatteryRaising the Seat Greasing the BearingsServicing the Air Cleaner Engine MaintenanceServicing Paper Element Changing the Oil and Filter Servicing the Engine OilChecking the Oil Level Remove the foam sleeve from the elementChecking the Hydraulic Oil Level Change the Hydraulic System Filter Servicing the Spark PlugRemoving the Spark Plug Cleaning the Blower HousingInstalling the Spark Plug Checking the Spark PlugReplacing the Fuel Filter Fuel System MaintenanceElectrical System Maintenance Fuel filter is in the fuel line between the tank and engineRemoving the Battery Charging the BatteryCharging the Battery Installing the Battery Servicing the Fuses and RelayBefore Inspecting or Servicing the Blades Drive System Maintenance Checking the Tire PressureMower Maintenance Servicing the Cutting Blades Inspecting the BladesRemoving the Blades Checking for Loose Blades or Damaged Spring Disc WashersSharpening the Blades Mower Belt MaintenanceInstalling the Blades Inspecting the BeltsLeveling the Mower Deck Off the clutch pulley as shown in and FigureAdjusting the Blade Slope Front-to-Rear Blade SlopeDeck lift arm Deck hanger Float retaining nut Replacing the Discharge Deflector Locate items shown in FigureTracking Adjustment Washing the Underside of the MowerMaintenance Cleaning and Storage StorageTroubleshooting Problem Possible Cause Corrective ActionTo Pushing the Machine by Hand Schematics DiagramElectrical Logic Schematic Exmark Quest Turf Equipment Service Record Page Page See EXMARK’S Complete Line of Accessories and Options

4500-450 specifications

The Exmark 4500-450 is a top-tier commercial-grade zero-turn mower that has gained immense popularity among landscaping professionals for its advanced features, superior performance, and durability. Designed to tackle the toughest mowing tasks, the 4500-450 stands out for its reliability and innovative technologies.

One of the defining characteristics of the Exmark 4500-450 is its powerful engine. Equipped with a robust Kohler or Kawasaki engine, this model delivers impressive horsepower, ensuring that it can handle even the most demanding terrains with ease. This power allows for efficient cutting, enabling users to complete jobs more quickly without sacrificing quality.

The Exmark 4500-450 features a commercial-grade cutting deck that is fully adjustable to provide a clean and professional-looking cut. Its cutting width can range from 48 to 60 inches, making it versatile enough to handle various lawn sizes and types. The deck is designed with a unique airflow management system that optimizes grass lift, ensuring even and consistent results.

One of the standout technologies in the Exmark 4500-450 is its patented UltraCut deck design. This innovative feature promotes superior cutting performance while reducing clumping and providing a finer mulching capability. Additionally, the deck is designed for easy cleaning, which helps maintain the mower’s performance over time.

Comfort and usability are top priorities for the Exmark 4500-450. It boasts an ergonomic seat with high back support, reducing operator fatigue during long mowing sessions. The intuitive control system allows for smooth maneuverability, even in tight spaces, making it ideal for commercial landscaping work.

Moreover, the Exmark 4500-450 is built with durability in mind. Constructed from high-quality materials, it is designed to withstand the rigors of daily use. Its heavy-duty frame and components contribute to its long lifespan, ensuring that it remains a reliable workhorse for years to come.

In conclusion, the Exmark 4500-450 is an exceptional choice for professionals seeking a powerful, efficient, and durable zero-turn mower. With its high-performance engine, innovative cutting technologies, and user-friendly features, it sets a standard in commercial landscaping equipment, delivering results that exceed expectations while making the mowing process as efficient and comfortable as possible.
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