Lawn Tractor · 1967Unverified
Simplicity 404 990390
Simplicity 404 990390 — Wonder Boy Series · 4 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
4 hp
Weight
107 kg
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Overview
ManufacturerSimplicity (a part of Allis Chalmers)Reference
Riding lawn mowerReference
Built in Port Washington, Wisconsin, USAReference
Original price was $280 in 1967Reference
Two-wheel driveReference
Manual steeringReference
Open operator station.Reference
Engine
4HP Briggs & Stratton 170cc 1-cyl gasolineReference
Briggs & Stratton 100000Reference
gasolineReference
1-cylinderReference
air-cooledReference
Displacement10.4 ciReference
Bore/Stroke64 x 54 mmReference
Power (gross)3.0 kWReference
Starter typemanual recoilReference
Image courtesy of Jeremy LinkowskiReference
Transmission
2-speed gearReference
Typebelt-driven gearReference
Gears2 forward and 1 reverseReference
Dimensions
Weight107 kgReference
Front tire10x2.75Reference
Rear tire13x5.00-6Reference
Weight27 kgReference
Lawn/turf front10x2.75Reference
Lawn/turf rear13x5.00-6Reference
Shipping weight107 kgReference
Simplicity 404 attachments
24" mid-mount mower deckReference
bladeReference
Attachment overview
24" mid-mount mower deckReference
BladeReference
24" Mower deck
Typemid-mount Simplicity 990358Reference
Type1-bladeReference
Cutting width60 cmReference
Cut height4 to 6 cmReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.