Ferris FW45 Walk Behind Mower (52" / 5901891)
Push / Walk-Behind mower · Model 5901891 · Commercial-duty · Gas
$10,723 Ferris list price
Manufacturer list price only — it excludes tax, freight, dealer setup and any local discount, and dealers set the final price.
- Weighs 814 lb
- On a 6×12 trailer 1,714 lb towed, single-axle 3,500 lb
- Mows an acre in 29 min (20 at top speed) How long for your yard? ›
- How these are worked out ›
The Ferris FW45 Walk Behind Mower (52 in / 5901891) is a commercial-grade gas walk-behind mower, built for daily professional use, with a 52-inch deck and a 726cc engine making 20.5 hp. It weighs 814 lb (369.2 kg).
At a glance
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
Few close matches: the list also allows a wider deck range, other duty classes and discontinued models, each labelled.
Chosen by stated rules, not opinion: same class, a deck within 2 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 |
|---|---|
| Displacement | 44.3 ci (726 cc) |
| Engine Power | 20.5 hp |
| Cylinders | 2 |
| Start Type | Electric |
| Engine Make | Kawasaki® FX651 |
| Fuel Type | Gas |
Deck
| Cutting Width | 52 in (1321 mm) |
|---|---|
| Min Cut Height | 1.5 in (38 mm) |
| Max Cut Height | 5 in (127 mm) |
| Deck Material | 10-gauge, Fabricated |
| Deck Gauge | 10 |
Drive
| Ground Speed | 7 mph |
|---|---|
| Reverse Speed | 3 mph |
| Transmission | Dual commercial Hydro-Gear® ZT-3400® transaxles with 7" cooling fans with oil coolers |
Dimensions
| Weight | 814 lbs (369.2 kg) |
|---|---|
| Fuel Capacity | 5 gal (18.9 L) |
| Length | 78.7 in (2000 mm) |
General
| Warranty | 2 yr |
|---|
Similar models
Other push / walk-behind mowers with comparable specs — including other brands — that buyers cross-shop with the FW45 Walk Behind Mower (52 in / 5901891).
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — ferrismowers.com.
See every mower with a Kawasaki engine ›
What the parts on this spec sheet mean
Other Ferris FW45 models › 5 more in this range: FW45 Walk Behind Mower (48 in / 5902014), FW45 Walk Behind Mower (52 in / 5901892), FW45 Walk Behind Mower (52 in / 5901893), FW45 Walk Behind Mower (52 in / 5902015) and more
See all Ferris 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 Ferris’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre7 min 5 min
- ½ acre15 min 10 min
- 1 acre29 min 20 min
- 2 acres58 min 41 min
- 5 acres2 h 26 min 1 h 42 min
- 10 acres4 h 51 min 3 h 24 min
About 29 min per acre at 2.06 acres/hour, mowing at 4.9 mph. The second figure is at the published 7.0 mph top speed (2.94 acres/hour) — faster than anyone really mows. About 10.3 acres per tank.
Weight & hauling
- Machine weight814 lb
- + 6×12 trailer900 lb
- Towed weight1,714 lb
- single-axle 3,500 lbCarries it, 1,786 lb spare
- tandem-axle 7,000 lbCarries it, 5,286 lb spare
Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 1,714 lb.
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 inch0.394 hp/in
- Run time per tank~5.0 h
Mowing times assume 2.06 acres/hour: deck width x 4.9 mph at 80% efficiency, which allows for overlap, turns and trimming. 4.9 mph is 70% of the 7.0 mph top speed Ferris publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 7.0 mph, shown so you can see it.
Fit uses the deck width plus 6 in for the discharge chute, because Ferris doesn't publish an overall width — measure before buying if a gate is tight.
Towed weight adds a 900 lb allowance for a 6x12 open utility trailer to Ferris's published machine weight. Your trailer's own weight is on its VIN plate. Tongue weight, axle placement and your vehicle's tow rating are still yours to check — this is the load, not a loading plan.
Run time assumes a typical 1 gal/hour burn at working load; real consumption varies with engine, load and cut.
Ferris FW45 Walk Behind Mower (52 in / 5901891) questions
What size deck is on the Ferris FW45 Walk Behind Mower (52 in / 5901891)?
The Ferris FW45 Walk Behind Mower (52 in / 5901891) has a 52-inch (1321 mm) cutting deck with 10-gauge, fabricated construction.
What engine is in the Ferris FW45 Walk Behind Mower (52 in / 5901891)?
The Ferris FW45 Walk Behind Mower (52 in / 5901891) is powered by a Kawasaki® FX651, 726 cc, 20.5 hp. Horsepower is the manufacturer's own rating.
How much does the Ferris FW45 Walk Behind Mower (52 in / 5901891) weigh?
The Ferris FW45 Walk Behind Mower (52 in / 5901891) weighs 814 lb (369.2 kg) as specified by Ferris.
What size trailer do I need for the Ferris FW45 Walk Behind Mower (52 in / 5901891)?
At 814 lb, the Ferris FW45 Walk Behind Mower (52 in / 5901891) on a typical 6x12 open utility trailer (about 900 lb empty) is roughly 1,714 lb of towed weight. That is within a single-axle 3,500 lb trailer, and your tow vehicle needs to be rated for at least 1,714 lb. Tongue weight, axle placement and your own trailer's empty weight still have to be checked — this is the arithmetic, not a loading plan.
How fast is the Ferris FW45 Walk Behind Mower (52 in / 5901891)?
Top ground speed is 7 mph. With its 52-inch deck that works out to about 2.94 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.
How long does the Ferris FW45 Walk Behind Mower (52 in / 5901891) take to mow an acre?
About 20 min per acre, from its 52-inch deck at 7 mph and 80% efficiency — roughly 2.94 acres an hour, so five acres is about 1 h 42 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 Ferris FW45 Walk Behind Mower (52 in / 5901891)?
The Ferris FW45 Walk Behind Mower (52 in / 5901891) holds 5 gal (18.9 L) of fuel.
How much does the Ferris FW45 Walk Behind Mower (52 in / 5901891) cost?
Ferris's published list price is $10,723, checked 22 October 2026. That excludes tax, freight, dealer setup and any local discount — dealers set the final price.
What is the Ferris FW45 Walk Behind Mower (52 in / 5901891) built for?
Commercial-duty push / walk-behind mower. Built for daily, paid commercial use.
Source: Ferris (manufacturer) · archived copy