Exmark 4500-686 Rev. B Throttle-Choke Lever ECXHN21, Choke Control ECXHNBBC21, Engine Stop Switch

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Operation

Throttle-Choke Lever (ECXHN21)

Located on the left side of the handle bar.

The lever is used to control engine speed. Moving the throttle to the full forward (Choke) position will place the lever in the choke position. The choke aids in starting a cold engine. Moving the throttle control forward will increase engine speed and moving it to the rear will decrease engine speed.

Choke Control (ECXHNBBC21)

Located on the front left side of the engine as shown in Figure 10.

The choke aids in starting a cold engine. Pulling outward will place the control in the choke position. Pushing the control inward shuts off the choke.

Figure 5

Clear plastic cover removed for clarity

1.Engine stop switch

2.Press “STOP” to kill engine

3.Press “I” before starting engine

Blade Control Lock Lever (Blade Brake Clutch Units Only)

The blade control lock lever is located on the right side of the handle next to the Blade Control Bail as shown in Figure 4.

Moving the blade control lock lever into the full forward position releases the blade control bail. Squeezing the blade control bail against the handle engages the blade. Releasing the blade control bail automatically disengages the blade. The blade control lock lever will reset to lock the blade control bail.

Engine Stop Switch

Located on the left side of the engine in front of the fuel tank as shown in Figure 5. The engine stop switch is used on ECXHNBBC21 and ECXKABBC21 (see Figure 10 and Figure 11 ).

Press the switch to “STOP” to kill the engine. Press “” before starting the engine.

Fuel Shut-Off Valve

The fuel shut off valve is located between the carburetor and the fuel tank. The fuel shut off valve shuts off the flow of fuel when the machine will not be used for a few days, when parking inside a building, and during transport to and from the job.

Figure 6

Kawasaki Unit

1.Fuel valve

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Contents Commercial California Introduction Contents Safe Operating Practices SafetySafety Alert Symbol TrainingSafety Operation Maintenance and Storage Slope OperationSafety and Instructional Decals 109-9317 116-1922 116-2685 117-2718 116-1900 116-2737 Model Numbers SpecificationsDimensions SystemsControls Product OverviewOperation Blade Control BailChoke Control ECXHNBBC21 Engine Stop SwitchThrottle-Choke Lever ECXHN21 Blade Control Lock Lever Blade Brake Clutch Units OnlyOperating Instructions Handle AdjustmentPre-Start Open the Fuel Shut-Off Valve Starting the EngineUsing the Mulch Plug Stopping the EngineAuthorized Service Dealer Test Using the Grass Bag Adjusting the Cutting HeightUsing the Grass Bag Operating Tips Maintenance Recommended Maintenance SchedulesCheck Engine Oil Level Checking the Blade Brake Clutch Blade Brake Clutch OnlyEmptying the Fuel Tank and Cleaning the Fuel Filter section Check the Mower BladeCheck for Loose Hardware Service Air Filter Kawasaki Units Service Air Filter ECSHN21 UnitsService Air Filter ECXHNBBC21 and ECXHN21 Units Damaged or excessively dirtyChange Engine Oil Check Condition Of Belt Self-Propelled Units Only Emptying the Fuel Tank and Cleaning the Fuel FilterChange Oil Filter ECXKA21 and ECXKABBC21 Check Spark PlugsAdjustments Adjusting the Self-Propel Drive Self-Propelled Units OnlyAdjustment of drive cable nuts Cleaning Under the Belt Cover Self-Propelled Units Only Clean Grass Build-Up Under DeckCleaning the Discharge Tunnel and Plug Screws BBC Shield Waste Disposal Motor Oil DisposalPreparing the Engine StoragePreparing the Fuel System General Storage InformationTroubleshooting Problem Possible Cause Corrective ActionTroubleshooting Exmark Commercial Turf Equipment Page See EXMARK’S Complete Line of Accessories and Options

4500-686 Rev. B specifications

The Exmark 4500-686 Rev. B is a cutting-edge commercial mower that embodies the perfect blend of performance, durability, and user-friendly features. Designed for professional landscapers and grounds maintenance professionals, this mower is built to handle the rigorous demands of large properties and commercial applications.

One of the standout features of the Exmark 4500-686 Rev. B is its powerful engine. Equipped with a robust EFI (Electronic Fuel Injection) engine, it delivers exceptional power and fuel efficiency. The engine's advanced technology allows for quicker starts and better throttle response, ensuring that users can tackle their mowing tasks without any delays. This efficiency translates into reduced operating costs and less time spent refueling.

Another notable technology integrated into this mower is the UltraCut deck system. The 4500-686 Rev. B features a precision-engineered cutting deck that provides a superior cutting performance, offering an even and professional finish to any lawn. The design promotes optimal airflow beneath the deck, resulting in better grass lift and dispersion, which reduces clumping and enhances the quality of the cut. Additionally, the cutting height is easily adjustable, allowing operators to customize their mowing according to specific turf conditions.

User comfort is a paramount consideration in the design of the Exmark 4500-686 Rev. B. The mower is equipped with an ergonomic seat and controls that minimize operator fatigue during extended use. The full-suspension seat absorbs shocks and vibrations, while the easy-to-use controls allow for intuitive operation, ensuring that mowing is a seamless and productive experience.

Durability is another key characteristic of the 4500-686 Rev. B. Built with high-quality materials and components, this mower is designed to withstand the wear and tear of everyday use. The frame is reinforced to provide added strength, while the corrosion-resistant coating ensures that it maintains its appearance and functionality over time.

In conclusion, the Exmark 4500-686 Rev. B is an exceptional choice for anyone looking for a reliable and efficient commercial mower. With its powerful EFI engine, advanced cutting technologies, emphasis on operator comfort, and rugged build quality, this mower offers unmatched performance in the field. Whether for professional landscaping or maintaining large properties, the Exmark 4500-686 Rev. B is engineered to meet the demands of any mowing job.