Simplicity Wonder Boy II
Power
4 hp
Production
1958
Engine
Gasoline, 1-cylinder
Transmission
Duomatic
Drive
2WD
From the same series:
Introduction
Simplicity Wonder Boy II Riding Lawn Mower
The Simplicity Wonder Boy II is a classic riding lawn mower produced between 1958 and 1959. Manufactured in Port Washington, Wisconsin, USA, this machine was designed specifically for residential lawn maintenance and represents a significant model in the evolution of early ride-on mowing equipment.
Engine and Powertrain
The tractor is powered by a Clinton 1290 gasoline engine. This 1-cylinder, air-cooled unit has a displacement of 167 cc (10.2 ci) and produces 4 hp (3.0 kW). The engine features a bore/stroke ratio of 63 x 54 mm and utilizes a manual recoil starter, with an electric starter available as an optional feature.
Transmission and Drive System
The Wonder Boy II utilizes a Duomatic belt-driven gear transmission, providing 2 forward gears and 2 reverse gears. Power is delivered to the ground via a two-wheel drive system, ensuring standard mobility for flat or gently sloped lawn surfaces.
Chassis and Mowing Equipment
The machine features an open operator station with manual steering for direct control. It is equipped with specialized lawn and turf tires, measuring 10x2.50 at the front and 4.00x8 at the rear, to minimize ground compaction. The mower is fitted with a 24-inch cutting deck designed for effective grass maintenance.
Conclusion
With an original market price of $350 in 1958, the Simplicity Wonder Boy II serves as a reliable example of mid-century lawn care machinery. It remains a notable piece for collectors interested in the history of American-built outdoor power equipment.
Production Information of Simplicity, Wonder Boy II
- Original price was $350 in 1958
- Riding lawn mower
- Built in Port Washington, Wisconsin, USA
| Manufacturer | Simplicity |
|---|
Dimension and Tires Information of Simplicity, Wonder Boy II
| Lawn/turf front | 10x2.50 |
|---|---|
| Lawn/turf rear | 4.00x8 |
Engine Specifications of Simplicity, Wonder Boy II
- Clinton 1290
- Air-cooled
- Gasoline
- 1-cylinder
| Power | 4 hp [3.0 kW] |
|---|---|
| Displacement | 167 cc [10.2 ci] |
| Starter type | Manual recoil |
| Bore/Stroke | 2.47x2.125 inches [63 x 54 mm] |
| Bore/Stroke(optional) | Electric |
Transmission Information of Simplicity, Wonder Boy II
Transmission variants 1
| Transmission | Duomatic |
|---|---|
| Type | Belt-driven gear |
| Gears | 2 forward and reverse |
Mechanical Specs of Simplicity, Wonder Boy II
- Two-wheel drive
- Manual steering
- Open operator station.
Where it sits
With 4 HP, the Simplicity Wonder Boy II sits just above Wonder Boy (3 HP) in Simplicity's range. Its power puts it in the 51th percentile of 1950s models in our database (65 machines).
Frequently asked questions
How much horsepower does the Simplicity Wonder Boy II have?
The Simplicity Wonder Boy II delivers 4 HP.
What years was the Simplicity Wonder Boy II produced?
The Simplicity Wonder Boy II was produced in 1958.
What engine does the Simplicity Wonder Boy II have?
The Simplicity Wonder Boy II is powered by a Gasoline, 1-cylinder engine.
What transmission does the Simplicity Wonder Boy II use?
The Simplicity Wonder Boy II uses a Duomatic transmission.
Is the Simplicity Wonder Boy II 4WD?
The Simplicity Wonder Boy II is available in 2WD.