Exmark Radius S-Series (52")
Commercial mower · Model RDS691GKA523A3 · Commercial-duty · Gas
$7,699 Exmark list price
Manufacturer list price only — it excludes tax, freight, dealer setup and any local discount, and dealers set the final price.
- Mows an acre in 23 min (16 at top speed) How long for your yard? ›
- How these are worked out ›
The Exmark Radius S-Series (52 in) is a commercial-grade gas commercial mower, built for daily commercial mowing, with a 52-inch deck.
At a glance
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
Chosen by stated rules, not opinion: same class, a deck within 8 in of this one, the same kind of power and a compatible duty class, then the closest power, weight and price, with other makers preferred. Figures are the manufacturers’ published ones; nothing is estimated.
Engine
| Power Source | gas |
|---|---|
| Engine Make | Kawasaki FR691 |
| Engine Power | 23 hp |
Deck
| Cutting Width | 52 in (1321 mm) |
|---|---|
| Max Cut Height | 5 in (127 mm) |
| Min Cut Height | 1.5 in (38 mm) |
Drive
| Ground Speed | 9 mph |
|---|
Dimensions
| Fuel Capacity | 7 gal (26.5 L) |
|---|
Professional use
How the Radius S-Series (52 in) fits commercial and high-acreage work, from the specs we have. Duty class: Commercial.
Productivity computed from deck width and ground speed. Compare on the calculator ›
| Deck width | 52 in |
|---|---|
| Engine make | Kawasaki FR691 |
| Engine power | 23 hp |
| Ground speed | 9 mph |
| Cut-height range | 38 mm – 127 mm |
| Fuel capacity | 26.5 L |
Exmark doesn’t publish 13 of these for the Radius S-Series (52 in): engine displacement, transmission, drive type, weight, warranty, commercial warranty, deck construction, deck gauge, spindle type, frame construction, anti-scalp rollers, drive tire size, seat type.
See the Exmark commercial pro hub › · Professional buying hub ›
Similar models
Other commercial mowers with comparable specs — including other brands — that buyers cross-shop with the Radius S-Series (52 in).
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — exmark.com.
See every mower with a Kawasaki FR691 engine ›
What the parts on this spec sheet mean
Other Exmark Radius S-Series models › 2 more in this range: Radius S-Series (48 in), Radius S-Series (60 in)
See all Exmark mowers and specs ›
Spot a wrong spec? Suggest a correction.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.
What the specs work out to
Figures MowerFacts computes from Exmark’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre6 min 4 min
- ½ acre11 min 8 min
- 1 acre23 min 16 min
- 2 acres45 min 32 min
- 5 acres1 h 53 min 1 h 19 min
- 10 acres3 h 47 min 2 h 39 min
About 23 min per acre at 2.65 acres/hour, mowing at 6.3 mph. The second figure is at the published 9.0 mph top speed (3.78 acres/hour) — faster than anyone really mows. About 18.6 acres per tank.
Gate & trailer fit
- 32 in gateToo wide
- 36 in gateToo wide
- 48 in gateToo wide
Needs at least 59 in of clearance (estimated).
Power & run time
- Power per deck inch0.442 hp/in
- Run time per tank~7.0 h
Mowing times assume 2.65 acres/hour: deck width x 6.3 mph at 80% efficiency, which allows for overlap, turns and trimming. 6.3 mph is 70% of the 9.0 mph top speed Exmark publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 9.0 mph, shown so you can see it.
Fit uses the deck width plus 6 in for the discharge chute, because Exmark doesn't publish an overall width — measure before buying if a gate is tight.
Run time assumes a typical 1 gal/hour burn at working load; real consumption varies with engine, load and cut.
Exmark Radius S-Series (52 in) questions
What size deck is on the Exmark Radius S-Series (52 in)?
The Exmark Radius S-Series (52 in) has a 52-inch (1321 mm) cutting deck.
What engine is in the Exmark Radius S-Series (52 in)?
The Exmark Radius S-Series (52 in) is powered by a Kawasaki FR691, 23 hp. Horsepower is the manufacturer's own rating.
How fast is the Exmark Radius S-Series (52 in)?
Top ground speed is 9 mph. With its 52-inch deck that works out to about 3.78 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.
How long does the Exmark Radius S-Series (52 in) take to mow an acre?
About 16 min per acre, from its 52-inch deck at 9 mph and 80% efficiency — roughly 3.78 acres an hour, so five acres is about 1 h 19 min. Rough or obstacle-heavy ground takes longer; this is deck width times ground speed, not a timed test.
How big is the fuel tank on the Exmark Radius S-Series (52 in)?
The Exmark Radius S-Series (52 in) holds 7 gal (26.5 L) of fuel.
How much does the Exmark Radius S-Series (52 in) cost?
Exmark's published list price is $7,699, checked 23 October 2026. That excludes tax, freight, dealer setup and any local discount — dealers set the final price.
What is the Exmark Radius S-Series (52 in) built for?
Commercial-duty commercial mower. Built for daily, paid commercial use.
Source: Exmark (manufacturer) · archived copy