Simplicity Yeoman 637
Power
7 hp
Production
1972
Engine
Gasoline, 1-cylinder
Transmission
Belt-driven gear
Weight
268 lbs (recoil start) [121 kg]
Drive
2WD
From the same series:
Introduction
Simplicity Yeoman 637 Garden Tractor
The Simplicity Yeoman 637 is a garden tractor produced in 1972, designed for residential lawn care and light landscaping tasks. It belongs to the Simplicity Yeoman series, which was manufactured during the late 1960s and early 1970s.
Engine and Power
The tractor is powered by a Briggs & Stratton 17000 single-cylinder, air-cooled gasoline engine. It features a 275 cc displacement and delivers a gross power output of 7 hp (5.2 kW). The engine utilizes a vertical-shaft configuration and is typically started via a manual recoil system, with an optional electric start available. It requires 1.0 liters of engine oil for lubrication.
Transmission and Drive
The Yeoman 637 utilizes a belt-driven gear transmission system providing 3 forward gears and 1 reverse gear. It is a two-wheel drive machine equipped with manual steering and mechanical band brakes. The power take-off (PTO) is an independent mid-mounted system, engaged via a manual clutch to operate the included 32-inch mower deck.
Dimensions and Chassis
The tractor is designed for maneuverability with a 92 cm wheelbase and an overall length of 135 cm. The height to the top of the steering wheel is 83 cm, while the hood height is 72 cm. The unit weighs approximately 121 kg for the recoil-start version, or 130 kg with the electric-start option. It is fitted with 4.10/3.50x6 front turf tires and 16-6.50x8 rear turf tires.
Conclusion
The Simplicity Yeoman 637 is a compact, mechanical-drive garden tractor suited for homeowners requiring a straightforward machine for mowing and basic garden maintenance. Its simple design and manageable weight make it a practical choice for residential property care.
Production Information of Simplicity, Yeoman 637
- Garden tractor
| Manufacturer | Simplicity (a part of Allis Chalmers) |
|---|
Dimension and Tires Information of Simplicity, Yeoman 637
| Rear tread | 21.5 inches [54 cm] |
|---|---|
| Wheelbase | 36.5 inches [92 cm] |
| Weight | 268 lbs (recoil start) [121 kg] |
| Height (hood) | 28.5 inches [72 cm] |
| Length | 53.5 inches [135 cm] |
| Length(optional) | 288 lbs (electric start) [130 kg] |
| Height (steering wheel) | 33 inches [83 cm] |
| Lawn/turf front | 4.10/3.50x6 |
|---|---|
| Lawn/turf rear | 16-6.50x8 |
Engine Specifications of Simplicity, Yeoman 637
- Briggs & Stratton 17000
- Air-cooled vertical-shaft
- Gasoline
- 1-cylinder
| Oil capacity | 1.1 qts [1.0 L] |
|---|---|
| Displacement | 275 cc [16.79 ci] |
| Starter | Manual recoil |
| Bore/Stroke | 3.00x2.375 inches [76 x 60 mm] |
| Starter volts | 12 |
| Starter volts(optional) | Electric |
| Power (gross) | 7 hp [5.2 kW] |
Transmission Information of Simplicity, Yeoman 637
Transmission variants 1
| Type | Belt-driven gear |
|---|---|
| Gears | 3 forward and 1 reverse |
Mechanical Specs of Simplicity, Yeoman 637
- Two-wheel drive
- Open operator station.
- Manual steering
- Mechanical band brakes
Power Information of Simplicity, Yeoman 637
| Mid PTO | Independent |
|---|---|
| Clutch | Manual |
Electrical System of Simplicity, Yeoman 637
| Ground | Negative |
|---|---|
| Battery volts | 12 |
Where it sits
With 7 HP, the Simplicity Yeoman 637 sits just below Yeoman 648 (8 HP) in Simplicity's range. Its power puts it in the 22th percentile of 1970s models in our database (1008 machines).
Frequently asked questions
How much horsepower does the Simplicity Yeoman 637 have?
The Simplicity Yeoman 637 delivers 7 HP.
What years was the Simplicity Yeoman 637 produced?
The Simplicity Yeoman 637 was produced in 1972.
What engine does the Simplicity Yeoman 637 have?
The Simplicity Yeoman 637 is powered by a Gasoline, 1-cylinder engine.
What transmission does the Simplicity Yeoman 637 use?
The Simplicity Yeoman 637 uses a Belt-driven gear transmission.
How much does the Simplicity Yeoman 637 weigh?
The Simplicity Yeoman 637 weighs 268 lbs (recoil start) [121 kg].
Is the Simplicity Yeoman 637 4WD?
The Simplicity Yeoman 637 is available in 2WD.