Exmark 4500-450 User Manual
Specifications
Specifications
Model Numbers
Serial Nos: 790,000 and Higher
QST20BE422; QST22BE482; QST24BE522
Systems
Engine
•
Engine Specifications: See your Engine Owner’s
Manual
Manual
•
RPM:
– 20HP
Full Speed: 3300 ±100 (max) RPM (No Load)
Idle: 1650 (min) RPM
Idle: 1650 (min) RPM
– 22HP & 24HP
Full Speed: 3650 ±100 (max) RPM (No Load)
Idle: 1650 (min) RPM
Idle: 1650 (min) RPM
Fuel System
•
Capacity: 4.0 gal. (15.1 L)
•
Type of Fuel: Regular unleaded gasoline, 87
octane or higher.
octane or higher.
•
Fuel Filter:
Briggs & Stratton P/N 695666
•
Fuel Shut-Off Valve: 1/4 turn increments (“ON”,
“OFF”)
“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
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.)
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.
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.
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.
two heights.
– Separate levers, on each side of the console,
control speed and direction of travel of the
respective drive wheels.
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.
(to drive belt) which engages mower blades.
•
Parking Brake Lever: Engages parking brake.
•
Deck Height Adjustment Pin: Sets cutting height
to desired position.
to desired position.
•
Deck Lift Assist Lever: Foot pedal that assists
in raising the deck.
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).
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.
hydraulic pumps, battery and other components.
Held in tilted position with lanyard. Adjustable
fore and aft.
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