Compare/Simplicity 401 990357 vs Simplicity Wonder Boy

Simplicity 401 990357 vs Simplicity Wonder Boy

Verdict: Simplicity 401 990357 vs Simplicity Wonder Boy

The Simplicity 401 990357 and the Simplicity Wonder Boy are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 4 hp. Simplicity 401 990357 is the newer design (1965 vs 1957). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Simplicity

Fit score

Best match

Clear

Simplicity

Fit score

Best match

Clear

Rated power

4 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Simplicity (a part of Allis Chalmers)Reference

SimplicityReference

air-cooledReference

Engine

Power

3.0 kWReference

2.7 kWReference

Starter type

manual recoilReference

electricReference

Displacement

—

10.2 ciReference

Bore/Stroke

—

63 x 54 mmReference

Transmission

Gears

2 forward and reverseReference

1 forward and reverseReference

Clutch

—

mechanical idler pulleyReference

Simplicity 401 attachments

24" Mower deck

Type

belt-driven gearReference

Cutting width

60 cmReference

Cut height

—

3 to 8 cmReference

Variants

990086

—

manual startReference

990102

—

electric startReference

Dimensions

Front tire

—

10x2.50Reference

Rear tire

—

4.00x8Reference

Lawn/turf front

—

10x2.50Reference

Lawn/turf rear

—

4.00x8Reference

Simplicity Wonder Boy attachments

Attachment overview

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.