Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower
Zero-Turn mower · Model CMXGNAM211701 · Prosumer-duty · Gas
Craftsman doesn’t publish a list price for this model — it’s dealer quote only. The Craftsman product page is the place to start.
- Weighs 600 lb
- On a 6×12 trailer 1,500 lb towed, single-axle 3,500 lb
- Mows an acre in 36 min (25 at top speed) How long for your yard? ›
- How these are worked out ›
The Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower is a prosumer-grade gas zero-turn mower, built for large residential properties and acreage, with a 42-inch deck and a 725cc engine making 20 hp. It weighs 600 lb (272.2 kg).
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 6 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 | 44.2 ci (725 cc) |
| Engine Power | 20 hp |
Deck
| Cutting Width | 42 in (1067 mm) |
|---|---|
| Blades | 2 |
| Min Cut Height | 1 in (25 mm) |
| Max Cut Height | 4.5 in (114 mm) |
| Deck Gauge | 13 |
| Cut Positions | 8 |
Drive
| Ground Speed | 7 mph |
|---|---|
| Reverse Speed | 3.5 mph |
Dimensions
| Weight | 600 lbs (272.2 kg) |
|---|---|
| Fuel Capacity | 3.5 gal (13.2 L) |
| Length | 84 in (2134 mm) |
| Width | 48 in (1219 mm) |
Productivity & acreage
42-in 20 HP Gas Zero-Turn Riding Lawn Mower deck width, ground speed and computed acres-per-hour, from the specs we have. Duty class: Prosumer — A higher-capacity homeowner machine for larger properties and acreage.
Productivity computed from deck width and ground speed. Compare on the calculator ›
| Deck width | 42 in |
|---|---|
| Engine displacement | 725 cc |
| Engine power | 20 hp |
| Ground speed | 7 mph |
| Cut-height range | 25 mm – 114 mm |
| Fuel capacity | 13.2 L |
| Weight | 272.2 kg |
| Deck gauge | 13 ga |
Craftsman doesn’t publish 11 of these for the 42-in 20 HP Gas Zero-Turn Riding Lawn Mower: engine make, transmission, drive type, warranty, commercial warranty, deck construction, spindle type, frame construction, anti-scalp rollers, drive tire size, seat type.
Similar models
Other zero-turn mowers with comparable specs — including other brands — that buyers cross-shop with the 42-in 20 HP Gas Zero-Turn Riding Lawn Mower.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — craftsman.com.
What the parts on this spec sheet mean
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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 Craftsman’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre9 min 6 min
- ½ acre18 min 13 min
- 1 acre36 min 25 min
- 2 acres1 h 12 min 51 min
- 5 acres3 h 2 h 6 min
About 36 min per acre at 1.66 acres/hour, mowing at 4.9 mph. The second figure is at the published 7.0 mph top speed (2.38 acres/hour) — faster than anyone really mows. About 5.8 acres per tank.
Weight & hauling
- Machine weight600 lb
- + 6×12 trailer900 lb
- Towed weight1,500 lb
- single-axle 3,500 lbCarries it, 2,000 lb spare
- tandem-axle 7,000 lbCarries it, 5,500 lb spare
Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 1,500 lb.
Gate & trailer fit
- 32 in gateToo wide
- 36 in gateToo wide
- 48 in gateFits
Needs at least 48 in of clearance.
Power & run time
- Power per deck inch0.476 hp/in
- Run time per tank~3.5 h
Mowing times assume 1.66 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 Craftsman 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 Craftsman's published overall width.
Towed weight adds a 900 lb allowance for a 6x12 open utility trailer to Craftsman'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.
Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower questions
What size deck is on the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower?
The Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower has a 42-inch (1067 mm) cutting deck with 2 blades.
What engine is in the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower?
The Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower is powered by 725 cc, 20 hp. Horsepower is the manufacturer's own rating.
How much does the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower weigh?
The Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower weighs 600 lb (272.2 kg) as specified by Craftsman.
What size trailer do I need for the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower?
At 600 lb, the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower on a typical 6x12 open utility trailer (about 900 lb empty) is roughly 1,500 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 1,500 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 Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower?
Top ground speed is 7 mph. With its 42-inch deck that works out to about 2.38 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.
How long does the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower take to mow an acre?
About 25 min per acre, from its 42-inch deck at 7 mph and 80% efficiency — roughly 2.38 acres an hour, so five acres is about 2 h 6 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 Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower?
The Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower holds 3.5 gal (13.2 L) of fuel.
How much does the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower cost?
Craftsman doesn't publish a list price for the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower — it's sold on a dealer quote. MowerFacts records prices only where the manufacturer publishes them.
What is the Craftsman 42-in 20 HP Gas Zero-Turn Riding Lawn Mower built for?
Prosumer-duty zero-turn mower. A higher-capacity homeowner machine for larger properties and acreage.
Source: Craftsman (manufacturer) · archived copy