Troubleshooting

Troubleshooting

Important: It is essential that all operator safety mechanisms be connected and in proper operating condition prior to mower use.

When a problem occurs, Do Not overlook the simple causes. For example: starting problems could be caused by an empty fuel tank.

The following table lists some of the common causes of trouble. If a problem continues, contact an Authorized Service Dealer.

Problem		Possible Cause		Corrective Action

Engine will not start, starts hard, or fails to	1.	Fuel tank is empty.	1.	Fill the fuel tank.
keep running.	2.	Fuel shutoff valve is closed.	2.	Open the fuel shutoff valve.
	2.	Fuel shutoff valve is closed.	2.	Open the fuel shutoff valve.
	3.	The throttle lever is not in the correct	3.	Move the throttle lever to the Choke
		position.		position.
	4.	Dirt, water, or stale fuel is in the fuel	4.	Contact an Authorized Service Dealer.
		system.
	5.	Faulty spark plug.	5.	Clean, adjust or replace spark plug.
	6.	Spark plug wire is not connected.	6.	Check the spark plug wire connection.

Engine loses power.	1.	Air cleaner is dirty.	1.	Clean or replace the air cleaner element.
	2.	Oil level in the crankcase is low.	2.	Add oil to the crankcase.
	3.	Vent hole in the fuel cap is plugged.	3.	Clean or replace the fuel cap.
	4.	Dirt in fuel filter.	4.	Replace the fuel filter.
	5.	Dirt, water, or stale fuel is in the fuel	5.	Contact an Authorized Service Dealer.
		system.
	6.	The underside of the lawn mower deck	6.	Clean the underside of the lawn mower
		contains clippings and debris.		deck.

Engine runs rough.	1.	The wire is not connected to the spark	1.	Connect the wire to the spark plug.
		plug.
	2.	Faulty spark plug.	2.	Clean, adjust or replace spark plug.
	3.	The throttle lever is not in the Fast	3.	Move the throttle lever to the Fast
		position.		position.
	4.	The air filter element is dirty and is	4.	Clean the air filter pre-cleaner and/or
		restricting the air flow.		replace the paper air filter.

Lawn mower or engine vibrates excessively.	1.	The blade is bent or is out of balance.	1.	Balance the blade. If the blade is bent,
				replace it.
	2.	The blade mounting bolt is loose.	2.	Tighten the blade mounting bolt.
	3.	The underside of the lawn mower deck	3.	Clean the underside of the lawn mower
		contains clippings and debris.		deck.
	4.	The engine mounting bolts are loose.	4.	Tighten the engine mounting bolts.

Uneven cutting pattern.	1.	All four wheels are not at the same height.	1.	Place all four wheels at the same height.
	2.	The blade is dull.	2.	Sharpen and balance the blade.
	3.	Mowing in the same pattern repeatedly.	3.	Change the mowing pattern.
	4.	The underside of the lawn mower deck	4.	Clean the underside of the lawn mower
		contains clippings and debris.		deck.

Discharge chute plugs.	1.	The throttle lever is not in the Fast	1.	Move the throttle lever to the Fast
		position.		position.
	2.	Cutting too much grass in one pass	2.	Raise the cutting height. If necessary, cut
				a second time at lower cutting height.
	3.	Mowing too fast.	3.	Slow down.
	4.	The grass is wet.	4.	Allow the grass to dry before mowing.
	5.	The underside of the lawn mower deck	5.	Clean the underside of the lawn mower
		contains clippings and debris.		deck.

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.

Problem

Possible Cause

Corrective Action

4500-686 Rev. B specifications