Sears lawn tractors ST/12
Power
12 hp
Production
1973-1976
Engine
Gasoline, 1-cylinder
Transmission
Belt-driven gear
Weight
641 lbs [290 kg]
Drive
2WD
Introduction
Sears ST/12 Garden Tractor
The Sears ST/12 is a garden tractor produced by Roper between 1973 and 1976. Distributed under the Sears brand, this model was designed for residential lawn maintenance and versatile garden utility, originally retailing for $970 in 1974.
Engine and Powertrain
The tractor is powered by a 453 cc (27.66 ci) single-cylinder, air-cooled gasoline engine with a horizontal shaft. It produces 12 horsepower (8.9 kW) and utilizes an electric starter powered by a 12-volt battery system. Power is transmitted through a belt-driven gear transmission offering six forward speeds and two reverse speeds, controlled by a manual clutch.
Chassis and Steering
The ST/12 features a two-wheel drive configuration and manual steering. The operator operates from an open station design. With a wheelbase of 43.4 inches (110 cm) and a total width of 36.5 inches (92 cm), the unit is compact and intended for maneuvering in garden environments. It has a shipping weight of 641 lbs (290 kg).
Attachments and Utility
The machine is equipped with an independent mid-mounted PTO (Power Take-Off) for driving implements. It is designed to accommodate 42-inch or 48-inch mower decks. Additionally, an optional Sears 3-point hitch was available to increase the tractor's utility for various ground-engaging tasks.
Conclusion
The Sears ST/12 is a robust garden tractor suited for landowners requiring a versatile machine for mowing and light utility work. Its mechanical simplicity and availability of power take-off options make it a representative example of 1970s garden equipment.
Production Information of Sears lawn tractors, ST/12
- Original price was $970 in 1974
- Garden tractor
| Distributor | Sears |
|---|---|
| Manufacturer | Roper |
Dimension and Tires Information of Sears lawn tractors, ST/12
| Wheelbase | 43.4 inches [110 cm] |
|---|---|
| Shipping weight | 641 lbs [290 kg] |
| Height (steering wheel) | 44 inches [111 cm] |
| Length | 68.5 inches [173 cm] |
| Width | 36.5 inches [92 cm] |
| Lawn/turf front | 16x5.50 |
|---|---|
| Lawn/turf rear | 22.5x7.50 |
Engine Specifications of Sears lawn tractors, ST/12
- Air-cooled horizontal-shaft
- Gasoline
- 1-cylinder
| Power | 12 hp [8.9 kW] |
|---|---|
| Displacement | 453 cc [27.66 ci] |
| Starter | Electric |
| Bore/Stroke | 3.50x2.875 inches [89 x 73 mm] |
| Starter volts | 12 |
Transmission Information of Sears lawn tractors, ST/12
Transmission variants 1
| Type | Belt-driven gear |
|---|---|
| Gears | 6 forward and 2 reverse |
Mechanical Specs of Sears lawn tractors, ST/12
- Two-wheel drive
- Manual steering
- Open operator station.
Power Information of Sears lawn tractors, ST/12
| Mid PTO | Independent |
|---|---|
| Clutch | Manual |
Three-Point Hitch of Sears lawn tractors, ST/12
| Type(optional) | Sears 3-Point |
|---|
Electrical System of Sears lawn tractors, ST/12
| Ground | Negative |
|---|---|
| Battery volts | 12 |
Where it sits
With 12 HP, the Sears lawn tractors ST/12 sits between LT1136 (11 HP) and 14/6 (14 HP) in Sears lawn tractors's range. Its power puts it in the 76th percentile of 1970s models in our database (1008 machines).
Frequently asked questions
How much horsepower does the Sears lawn tractors ST/12 have?
The Sears lawn tractors ST/12 delivers 12 HP.
What years was the Sears lawn tractors ST/12 produced?
The Sears lawn tractors ST/12 was produced in 1973-1976.
What engine does the Sears lawn tractors ST/12 have?
The Sears lawn tractors ST/12 is powered by a Gasoline, 1-cylinder engine.
What transmission does the Sears lawn tractors ST/12 use?
The Sears lawn tractors ST/12 uses a Belt-driven gear transmission.
How much does the Sears lawn tractors ST/12 weigh?
The Sears lawn tractors ST/12 weighs 641 lbs [290 kg].
Is the Sears lawn tractors ST/12 4WD?
The Sears lawn tractors ST/12 is available in 2WD.