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2026 Exmark Radius S-Series RDS691GKA523A3

Total Price:    $8,005.98

Highlights

Tishomingo, MS
In Stock
New
2026
Exmark
Radius S-Series RDS691GKA523A3
Red
Lawn Mower
Zero-Turn Mower

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info specifications
Discover the Exmark Radius S-Series Mower
With a compelling blend of speed, power, cut quality and value, the new Radius S-Series is the ideal zero-turn mower for home and acreage owners that demand advanced performance. Choose from 48-, 52- or 60-inch UltraCut Series 3 side-discharge cutting decks equipped with Exmark’s exclusive flow-control baffles for superior cut quality. The deluxe high-back seat features adjustable spring suspension, with molded flip-up armrests to deliver superior all-day comfort for operators of virtually any stature.

Radius S-Series models are designed for maximum durability with reduced maintenance needs. With just two annual grease points, low-maintenance HydroGear transmissions, reliable Kawasaki engines, and long-lasting components, the Radius S-Series is designed to run stronger and longer with less maintenance.

Full-Suspension Operator Seat
The Radius S-Series upgrades to a deluxe full-suspension operator seat to minimize bumps and vibration that reach the operator. When combined with the large 23-inch drive tires, the Radius S-Series delivers a smoother ride for increased operator comfort and decreased fatigue.

UltraCut Series 3 Cutting Deck
Fabricated and fully welded of high-strength steel, the UltraCut Series 3 cutting deck features Exmark’s exclusive Flow-Control baffles for Exmark Signature cut quality. Maintenance-free sealed bearing spindle assemblies and double-capture anti-scalp rollers offer increased durability with reduced maintenance requirements.

Integrated Hydro Pumps and Motors
Dual Hydro-Gear ZT-3100 hydro transmissions feature an integrated pump and motor design for maximum efficiency, long-term reliability and ground speeds of up to 9 mph.

High-Strength Fabricated Steel Frame
Fabricated and fully welded of high-strength rectangular steel tubing, the Radius frame places the heaviest components –– engine, transmission and fuel tank –– low and centralized in the frame. This lowers the machine’s center of gravity for increased traction and stability. New steel engine guards increase engine protection at the sides and rear of the machine, while also being easily removable for service access.

Easy Serviceability
With a floor pan and belt shields that remove easily, without tools, and an integrated jack receiver at the front of the frame, Radius models offer unparalleled maintenance access to the top and bottom of the cutting deck.

Upgraded Commercial Warranty
Radius S-Series models are covered by an extended 4-year/500-hour commercial warranty.

Radius S-Series Model RDS691GKA523A3 at a Glance
Fuel Capacity - 7 gallon
Speed - 9 mph
Cutting Height Range - 1.5" - 5.0"
Coverage in Acres - 3-5
Acres Per Hour - 3.77

Features
3.77 Acres/Hour
52" Deck
Kawasaki V-Twin FR691 Engine
Full-floating UltraCut Series 3, side discharge standard, with molded discharge chute and option to bag or mulch

Specifications

Equipment

UPC 193308242460
Width / Cutting Deck 52"
Drive Hydro-Drive
Starter Electric
Steering Control Hydraulically dampened twin levers adjustable both fore and aft. Also has 2-position height adjustment.
Caster Forks .375" thick caster yoke arms.
Front Caster Tires 13 x 6.5-5 smooth-tread, pneumatic.
Drive Tires 23 x 9.5-12 K3012
Safety Package Operator Presence Controls (OPC) and drive system interlock.
Parking Brake Automatic-actuated pawl brake.
Tractor Frame Unibody, welded, heavy-duty 1.5" x 3" tubular steel.
Blade Spindles No maintenance, sealed and non-greasable spindles; 7.75"-diameter cutter housing with 25mm (.98") diameter spindle shaft.
Cup Holder Yes
Electrical 12 volt battery with 15-amp alternator
Standard Features Hour meter, cup holder, hitch, suspension seat
Seat Deluxe, two-tone, bolstered suspension seat with flip up armrests and 3" travel
Optional Features Hour meter, suspension seat and armrests

Power Components

Engine Brand Kawasaki
Transmission Brand Hydro-Gear
Transmission Speeds Infinitely Variable
Engine Model FR691
Engine Displacement 691
Engine Series V-Twin
Fuel System Carbureted
Speed Infinitely variable speed selection from 0–9.0 mph forward, 0–4.5 mph reverse
Transmission Hydrostatic
Engine Spec AS43-R
Engine Speed 3,600 rpm
Air Filter Standard Engine Manufacturer's air filter
Fuel Capacity 7-gallon single fuel tank with single fill location
Drive Description Two Hydro-Gear ZT-3100 hydro static transmissions with no hoses and integrated cooling fans and integrated reservoir
Fuel Type Gas Carbureted
PTO Engagement Electromagnetic 105-ft-lb clutch
Drive Wheel Release Allows unit movement without engine running.
Fuel Indicator Float gauge
Deck Lift Foot pedal, single point drop pin HOC lift assist springs
Carb Compliant No
ROPS 2-post foldable ROPS standard with seat belt.

Decks

Deck Style Floating Deck
Deck Style Description Full-floating UltraCut Series 3, side discharge standard, with molded discharge chute and option to bag or mulch.
Deck Construction 10-gauge top that is formed and welded, 7-gauge side skirt and .375" welded bumper. 4 point suspension.
Cutting Heights 1.5" to 5.0" in 0.25 increments
Blade Tip Speed Approximately 18,500 fpm
Blades 3 Blades at 18.0" Length

Dimensions

Width 64.3"
Height 73.7"
Curb Weight 881
Length 83.9"

Certain features may require an additional add-on package that may not be included in the retail or sale price. Please contact the dealership for full details.

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