John Deere X390 Lawn Tractor with 48-inch Deck
Riding (Lawn Tractor) mower · Model X390 · Prosumer-duty · Gas
John Deere doesn’t publish a list price for this model — it’s dealer quote only. The John Deere product page is the place to start.
- Weighs 679 lb
- On a 6×12 trailer 1,579 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 John Deere X390 Lawn Tractor with 48-inch Deck is a prosumer-grade gas lawn tractor, built for large residential properties and acreage, with a 48-inch deck and a 726cc engine making 23 hp. It weighs 679 lb (308 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 | 44.3 ci (726 cc) |
| Engine Power | 23 hp |
| Cylinders | 2 |
| Engine Model | FR691V |
Deck
| Cutting Width | 48 in (1220 mm) |
|---|---|
| Min Cut Height | 1 in (25 mm) |
| Max Cut Height | 4 in (102 mm) |
| Deck Material | 10 gauge 0.135 in. 3.4 mm |
| Deck Gauge | 10 |
Drive
| Transmission | K58 hydrostatic integrated with transaxle |
|---|---|
| Ground Speed | 6.2 mph |
| Drive System | Dual belt |
| Reverse Speed | 3.5 mph |
Dimensions
| Weight | 679 lbs (308 kg) |
|---|---|
| Fuel Capacity | 3.3 gal (12.5 L) |
General
| Bagger Capacity | 19 bu (670 L) |
|---|---|
| Warranty | 4 yr |
Productivity & acreage
X390 Lawn Tractor with 48-inch Deck 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 | 48 in |
|---|---|
| Engine displacement | 726 cc |
| Engine power | 23 hp |
| Transmission | K58 hydrostatic integrated with transaxle |
| Ground speed | 6.2 mph |
| Cut-height range | 25 mm – 102 mm |
| Fuel capacity | 12.5 L |
| Weight | 308 kg |
| Warranty | 4 |
| Deck construction | 10 gauge 0.135 in. 3.4 mm |
| Deck gauge | 10 ga |
John Deere doesn’t publish 8 of these for the X390 Lawn Tractor with 48-inch Deck: engine make, drive type, commercial warranty, spindle type, frame construction, anti-scalp rollers, drive tire size, seat type.
See the John Deere commercial pro hub › · Professional buying hub ›
Similar models
Other riding (lawn tractor) mowers with comparable specs — including other brands — that buyers cross-shop with the X390 Lawn Tractor with 48-inch Deck.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — deere.com.
What the parts on this spec sheet mean
Other John Deere X300 Series models › 8 more in this range: X330 Lawn Tractor with 42-inch Deck, X350 Lawn Tractor with 42-inch Deck, X350RLawn Tractor with 42-inch Rear-Discharge Deck, X354 Lawn Tractor with 42-in. Deck and more
See all John Deere mowers and specs ›
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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 John Deere’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre9 min 6 min
- ½ acre18 min 12 min
- 1 acre36 min 25 min
- 2 acres1 h 11 min 50 min
- 5 acres2 h 58 min 2 h 5 min
About 36 min per acre at 1.68 acres/hour, mowing at 4.3 mph. The second figure is at the published 6.2 mph top speed (2.4 acres/hour) — faster than anyone really mows. About 5.5 acres per tank.
Weight & hauling
- Machine weight679 lb
- + 6×12 trailer900 lb
- Towed weight1,579 lb
- single-axle 3,500 lbCarries it, 1,921 lb spare
- tandem-axle 7,000 lbCarries it, 5,421 lb spare
Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 1,579 lb.
Gate & trailer fit
- 32 in gateToo wide
- 36 in gateToo wide
- 48 in gateToo wide
Needs at least 55 in of clearance (estimated).
Power & run time
- Power per deck inch0.479 hp/in
- Run time per tank~3.3 h
Mowing times assume 1.68 acres/hour: deck width x 4.3 mph at 80% efficiency, which allows for overlap, turns and trimming. 4.3 mph is 70% of the 6.2 mph top speed John Deere publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 6.2 mph, shown so you can see it.
Fit uses the deck width plus 6 in for the discharge chute, because John Deere 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 John Deere'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.
John Deere X390 Lawn Tractor with 48-inch Deck questions
What size deck is on the John Deere X390 Lawn Tractor with 48-inch Deck?
The John Deere X390 Lawn Tractor with 48-inch Deck has a 48-inch (1220 mm) cutting deck with 10 gauge 0.135 in. 3.4 mm construction.
What engine is in the John Deere X390 Lawn Tractor with 48-inch Deck?
The John Deere X390 Lawn Tractor with 48-inch Deck is powered by 726 cc, 23 hp. Horsepower is the manufacturer's own rating.
How much does the John Deere X390 Lawn Tractor with 48-inch Deck weigh?
The John Deere X390 Lawn Tractor with 48-inch Deck weighs 679 lb (308 kg) as specified by John Deere.
What size trailer do I need for the John Deere X390 Lawn Tractor with 48-inch Deck?
At 679 lb, the John Deere X390 Lawn Tractor with 48-inch Deck on a typical 6x12 open utility trailer (about 900 lb empty) is roughly 1,579 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 1,579 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 John Deere X390 Lawn Tractor with 48-inch Deck?
Top ground speed is 6.2 mph. With its 48-inch deck that works out to about 2.4 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.
How long does the John Deere X390 Lawn Tractor with 48-inch Deck take to mow an acre?
About 25 min per acre, from its 48-inch deck at 6.2 mph and 80% efficiency — roughly 2.4 acres an hour, so five acres is about 2 h 5 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 John Deere X390 Lawn Tractor with 48-inch Deck?
The John Deere X390 Lawn Tractor with 48-inch Deck holds 3.3 gal (12.5 L) of fuel.
How much does the John Deere X390 Lawn Tractor with 48-inch Deck cost?
John Deere doesn't publish a list price for the John Deere X390 Lawn Tractor with 48-inch Deck — it's sold on a dealer quote. MowerFacts records prices only where the manufacturer publishes them.
What is the John Deere X390 Lawn Tractor with 48-inch Deck built for?
Prosumer-duty riding mower. A higher-capacity homeowner machine for larger properties and acreage.
Source: John Deere (manufacturer) · archived copy