Mower series / Spartan
Spartan RT-HD
The Spartan RT-HD is a residential zero-turn with a 54-, 61- or 72-inch reinforced 7-gauge deck, 6 inches deep. You can get a 35 hp Kawasaki FX1000 or a 37 hp Vanguard EFI, on Parker HTJ transaxles. It's sold at our Conroe, Navasota, Normangee and Buna stores.
At a glance
residential zero-turn · 3 models: 54", 61" and 72"
- Deck size
- 54-72 in
- Engine
- Vanguard EFI, Kawasaki FX1000
- Engine horsepower
- 35-37 hp
- Transmission
- Parker HTJ Transaxles - 12cc Drive Motors
- Top speed
- 11 mph
- Cutting height
- 1.5-4.75 in
- Fuel capacity
- 9.5 gal
- Weight
- 1,052-1,172 lb
Sold at Conroe, Navasota, Normangee and Buna. Best for big acreage around the house, owners who want a 72-inch deck, places from several acres on up.
Every model, side by side
| Specification | 54" | 61" | 72" |
|---|---|---|---|
| Engine | |||
| Engine | Kawasaki FX1000 | Vanguard EFI 993cc or Kawasaki FX1000 | Vanguard EFI 993cc or Kawasaki FX1000 |
| Engine horsepower | 35 hp | 37 hp (Vanguard) or 35 hp (Kawasaki) | 37 hp (Vanguard) or 35 hp (Kawasaki) |
| Displacement | Not listed by OEM | 993 cc (Vanguard) | 993 cc (Vanguard) |
| Fuel capacity | 9.5 gal | 9.5 gal | 9.5 gal |
| Deck | |||
| Deck size | 54 in | 61 in | 72 in |
| Deck construction | Reinforced 7-gauge full-floating deck, 6 in deep | Reinforced 7-gauge full-floating deck, 6 in deep | Reinforced 7-gauge full-floating deck, 6 in deep |
| Cutting height | 1.5-4.75 in (14 positions) | 1.5-4.75 in (14 positions) | 1.5-4.75 in (14 positions) |
| Drive | |||
| Transmission | Parker HTJ Transaxles - 12cc Drive Motors | Parker HTJ Transaxles - 12cc Drive Motors | Parker HTJ Transaxles - 12cc Drive Motors |
| Top speed (forward) | 11 mph | 11 mph | 11 mph |
| Top speed (reverse) | 5 mph | 5 mph | 5 mph |
| Size | |||
| Front tires | 13x6.5-R6 Radial | 13x6.5-R6 Radial | 13x6.5-R6 Radial |
| Rear tires | 24x10.5-R12 Radials | 24x12-12 Radials | 24x12-12 Radials |
| Width (deck out) | 55.5 in | 62.5 in | 73.5 in |
| Weight | 1,108 lb | 1,143 lb (Vanguard) or 1,052-1,099 lb (Kawasaki) | 1,172 lb (Vanguard) or 1,170 lb (Kawasaki) |
| Comfort | |||
| Seat | Full Suspension Seat with Adjustable TecsPak Elastomer supports and 360 degree Floating Seat Platform | Full Suspension Seat with Adjustable TecsPak Elastomer supports and 360 degree Floating Seat Platform | Full Suspension Seat with Adjustable TecsPak Elastomer supports and 360 degree Floating Seat Platform |
| Current pricing | See RT-HD 54" pricing | See RT-HD 61" pricing | See RT-HD 72" pricing |
All specifications on this page were taken directly from Spartan, the manufacturer. Figures from Spartan RT-HD specifications, checked November 2, 2026: Spartan RT-HD specifications.
Three decks, two engines
The 54-inch RT-HD comes with the 35 hp Kawasaki FX1000. On the 61 and 72, you can choose that Kawasaki or the Vanguard EFI, a 993 cc engine rated 37 hp. Each one's got a 9.5-gallon tank.
The Vanguard's 37 hp is 2 hp over the Kawasaki. Six inches of deck depth gives heavy grass room to lift before it's cut.
The deck is reinforced 7-gauge steel, full-floating and 6 inches deep. Cutting height runs from 1.5 to 4.75 inches in 14 positions. Overall widths are 55.5, 62.5 and 73.5 inches.
Weight's different for each build. The 54-inch is 1,108 lb. The 61 is 1,143 lb with the Vanguard or 1,052 to 1,099 lb with the Kawasaki. The 72 is 1,172 lb with the Vanguard and 1,170 lb with the Kawasaki.
Room to mow and a seat to match
Mowing several acres on up? You'll find the RT-HD is where Spartan's residential mowers get big. Parker HTJ transaxles with 12cc drive motors give you 11 mph forward and 5 mph in reverse.
It's on radials all around. The fronts are 13x6.5-R6. The rears are 24x10.5-R12 on the 54 and 24x12-12 on the 61 and 72.
The 72-inch is the widest deck Spartan offers on the RT-HD. At 73.5 inches wide, it needs a wide gate. The 54's the one for a tighter place.
The seat's a full-suspension seat on adjustable TecsPak elastomer supports and a 360-degree floating platform. Next to the RT-Pro, you get 35 to 37 hp instead of 24. Browse our zero-turn mowers on j5tractors.com and come see us.
Looking for pricing?
Current pricing is on our live inventory page at j5tractors.com, where our Conroe, Navasota, Normangee and Buna stores list the Spartan mowers they have. Check the 54", 61" and 72" there, then call the store to see one.
Financing
Financing for the Spartan RT-HD starts with our easy online credit application. It works for new and pre-owned machines.
Reach out to our sales team
- Gene Crye and Andrew LilleyConroe store(936) 441-8110
- Bryan LathamNavasota store(936) 825-8722
- Gavin Johnson and Cody JohnsonNormangee store(936) 396-6032
- George Holder and Steve JeterBuna store(409) 994-3522
Questions people ask
What engines are on the Spartan RT-HD?
The Spartan RT-HD runs a 35 hp Kawasaki FX1000 on all three decks. On the 61-inch and 72-inch decks, you can also get a 37 hp Vanguard EFI at 993 cc. Each one carries a 9.5-gallon tank, so the choice comes down to the engine itself.
How wide is the Spartan RT-HD with the 72-inch deck?
The Spartan RT-HD with the 72-inch deck measures 73.5 inches wide overall. The 61-inch is 62.5 inches and the 54-inch is 55.5. That's a lot of mower, so measure your gates and trailer first.
How does the Spartan RT-HD compare to the RT-Pro?
The Spartan RT-HD offers 54, 61 and 72-inch decks, where the RT-Pro comes in 61 only. It runs 35 to 37 hp against the RT-Pro's 24 hp. Both reach 11 mph. The RT-HD also adds a full-suspension seat on a floating platform.
How much does a Spartan RT-HD mower cost?
We keep current pricing on our live inventory page at j5tractors.com, where our Conroe, Navasota, Normangee and Buna stores list the Spartan mowers they have. Pricing depends on the model and how it's equipped, so check the listing for the 54", 61" and 72". If the one you want isn't listed, call the store.
