Specifications

Specifications

Model Numbers

Serial Nos: 790,000 and Higher

QST20BE422; QST22BE482; QST24BE522

Systems

Engine

Engine Specifications: See your Engine Owner’s Manual

RPM:

20HP

Full Speed: 3300 ±100 (max) RPM (No Load)

Idle: 1650 (min) RPM

22HP & 24HP

Full Speed: 3650 ±100 (max) RPM (No Load)

Idle: 1650 (min) RPM

Fuel System

Capacity: 4.0 gal. (15.1 L)

Type of Fuel: Regular unleaded gasoline, 87 octane or higher.

Fuel Filter:

Briggs & Stratton P/N 695666

Fuel Shut-Off Valve: 1/4 turn increments (“ON”, “OFF”)

Electrical System

Charging System: Flywheel Alternator

Charging Capacity: 16 amps

Battery Type: BCI Group U1

Battery Voltage: 12 Volt

Polarity: Negative Ground

Fuses: One 25 amp, one 20 amp; one 15 amp blade type

Diode: TVS

Safety Interlock System

PTO must be disengaged, brake engaged, and motion control levers out (neutral lock) to start engine. (It is not necessary for the operator to be in the seat to start the engine.)

Operator must be in seat when PTO is engaged, brake is disengaged, or motion control levers are moved in or engine will stop.

Engine will stop if either the left, the right, or both levers are moved from neutral lock position while brake is engaged.

Operator Controls

Steering and Motion Control:

Note: Motion control levers are adjustable to two heights.

Separate levers, on each side of the console, control speed and direction of travel of the respective drive wheels.

Steering is controlled by varying the position of the levers relative to each other.

Moving motion control levers outward (in slots) locks the drive system in neutral.

PTO Engagement Switch: Engages electric clutch (to drive belt) which engages mower blades.

Parking Brake Lever: Engages parking brake.

Deck Height Adjustment Pin: Sets cutting height to desired position.

Deck Lift Assist Lever: Foot pedal that assists in raising the deck.

Seat

Type: Standard seat with high back, foam padded with spring suspension and armrests (armrests are optional on the 42 inch unit).

Mounting: Hinged to tilt up for access to hydraulic pumps, battery and other components. Held in tilted position with lanyard. Adjustable fore and aft.

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Exmark 4500-450 manual Specifications, Model Numbers, Systems

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.