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NOW with exclusive Two-Speed Axle!
High and Low Speeds -- Forward and Reverse -- Full 4 HP

    Just one year ago, Simplicity startled the power garden industry with this new look in riding power units.  The Wonder-Boy was new, revolutionary . . . an exciting step forward.  But even then, people saw in it the answer to their lawn needs.

     Today, Wonder-Boy is a proven-performer, owned and enjoyed by thousands of Americans.  Young and old alike have found it the last word  -- simple to use, comfortable, safe and a trouble-free performer.

     Wonder-Boy has, literally, changed the lawn maintenance habits of America.  With it, you can mow lawns to golf-green smoothness without scalping . . . mulch leaves . . .  haul heavy loads . . . roll lawns  . . .   grade . . . plow snow!  Its rear-mounted engine puts heat and fumes behind you . . .  its simple Joy Stick control brings smooth, instant response . . .  and its exclusive Two-Speed Axle provides high and low speeds.

     Try Wonder-Boy yourself.  A few minutes aboard and you'll want this riding power unit on your grounds -- city or country.  For no other unit can do so much for you . . . so quickly and so well. 


Engine:  4 cycle, 4 HP, single cylinder, air cooled heavy duty cast iron. Recoil starter.

Clutches:  Simplicity "soft action," spring loaded idlers.  Conveniently located controls.

Axles:  "Duomatic" Two Speed Rear Axle, exclusive planetary design has two speeds forward and reverse.  Truck type differential.  Front axle "floats" 8" horizontally -- 16" vertically.

Steering:  Complete control of unit concentrated in single "Joy Stick."   Safety spring-loaded front wheel spindles.  Ball joint suspension on steering rods for ease of handling.

Tires:  Fully pneumatic, knob traction tires, 4.00 x 8, 2 ply, steel disc wheels.

Frame:  Electrically welded steel.  Center frame of heavy tubular steel. 

Optional Equipment:  12 Volt electric starter with 20 amp. hr. 12-volt battery.

[Source:  Simplicity Lawn & Garden Power Equipment catalog, 1957, courtesy of Iain McCowan}




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