Simplicity Wonder Boy II

Name: Simplicity Wonder Boy II
Brand: Simplicity

Power

4 hp

Production

1958

Engine

Gasoline, 1-cylinder

Transmission

Duomatic

Drive

2WD

Under 15 HP 1950s

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."

Introduction

Production Information of Simplicity, Wonder Boy II

The production information of the tractor (Wonder Boy II) includes details about its manufacturing.

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

This section sums up the dimension and tires information of the tractor.

No data available


Lawn/turf front	10x2.50
Lawn/turf rear	4.00x8

Engine Specifications of Simplicity, Wonder Boy II

Get the specifications for the engine and if different options are available.

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]
	Electric OptOptional

Transmission Information of Simplicity, Wonder Boy IIY

Discover all variants of transmission available for this tractor model.

Transmission variants 1


Transmission	Duomatic
Type	Belt-driven gear
Gears	2 forward and reverse

Mechanical Specs of Simplicity, Wonder Boy IIY

This section summarizes all mechanical information such as the brake system and other specifications.

Two-wheel drive

Manual steering

Open operator station.

Power Information of Simplicity, Wonder Boy IIY

Discover the power specifications and options available for this tractor model but also PTO (Power Take-off) information.

No data available

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.

More Simplicity models

4004 HP · 1961 - 1964 4014 HP · 1965 - 1966 4044 HP · 1967 - 1968 4504 HP · 1958 - 1959 3055 HP · 1968 - 1971 3155 HP · 1972 3255 HP · 1973 - 1974 3555 HP · 1969 - 1971

View all 315 Simplicity models →

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