The Kubota AT55 is a gasoline-powered walk-behind tiller from Kubota's 1980s tiller line, which also included the larger AT60 and AT70S and the diesel AD70. It pairs Kubota's own GS200-2T air-cooled 4-cycle engine — rated at 5.2 HP — with a 4-forward, 2-reverse gearbox and a belt-tension main clutch, cutting a standard tilling width of 500 mm (20 in.). At 82 kg (180.7 lbs.), it is a compact but fully gear-driven machine, and Kubota still lists the AT55 in its OEM parts system today. All figures below are transcribed from the factory manual.
Jump to: Dimensions & Weight | Engine | Clutch & Transmission | Axle Speeds | Tilling Width
Machine Dimensions & Weight
| Specification | AT55 |
|---|---|
| Overall length | 1480 mm (58 in.) |
| Overall width | 920 mm (36 in.) |
| Overall height | 975 mm (38 in.) |
| Weight | 82 kg (180.7 lbs.) |
Engine
| Specification | AT55 |
|---|---|
| Engine model | Kubota GS200–2T |
| Type | Air-cooled, 4-cycle gasoline engine |
| Total displacement | 201 cc (12.26 cu. in.)† |
| Maximum output | 5.2 HP |
| Fuel | Leaded or unleaded automotive gasoline |
| Fuel tank capacity | 2.3 L (2.4 U.S. qts.) |
| Ignition system | Transistor magneto |
| Starting system | Recoil starter |
Clutch & Transmission
| Specification | AT55 |
|---|---|
| Main clutch | Belt tension |
| Forward speeds | 4 |
| Reverse speeds | 2 |
Axle Speeds (RPM of Axle)
| Range / Position | Axle speed |
|---|---|
| Forward 1 — H | 34.6 rpm [0.58 r/s]‡ |
| Forward 1 — L | 56.1 rpm [0.93 r/s]‡ |
| Forward 2 — H | 75.7 rpm [1.26 r/s]‡ |
| Forward 2 — L | 122.9 rpm [2.04 r/s]‡ |
| Reverse — H | 13.2 rpm [0.22 r/s]‡ |
| Reverse — L | 21.5 rpm [0.36 r/s]‡ |
Tilling Width
| Specification | AT55 |
|---|---|
| Standard tilling width | 500 mm (20 in.) |
† The final digits of the cubic-inch displacement figure are partially illegible in our source scan. 201 cc converts to 12.26 cu. in., which matches the visible characters, so 12.26 is shown here.
‡ Axle speeds are transcribed exactly as printed in the factory manual. Note that within each range, the printed "L" figure is higher than the printed "H" figure (e.g., Forward 1: H = 34.6 rpm, L = 56.1 rpm). The revolutions-per-second values printed alongside are consistent with the rpm figures (rpm ÷ 60), so the table is internally consistent as printed; we have preserved the manual's H/L labeling rather than reversing it. The reverse range has a single set of H/L speeds — the manual's table shows no second reverse range.
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