Simplicity lawn tractors

Simplicity 404 990390

The Simplicity 404 is a riding lawn mower produced from 1967 to 1968 as part of the Wonder Boy Series. It features a 4 hp Briggs & Stratton 170cc 1-cylinder air-cooled gasoline engine with manual recoil start. The mower has a 2-speed belt-driven gear transmission with 2 forward and 1 reverse gear. It is two-wheel drive with manual steering and an open operator station. The mower weighs 237 lbs (107 kg) and rides on 10x2.75 front and 13x5.00-6 rear lawn/turf tires. Attachments include a 24" mid-mount mower deck and a 36" front-mount blade. It was built in Port Washington, Wisconsin, USA, and originally sold for $280 in 1967.

Power4 hp

Founded24" deck

Model404

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Technical Specifications

Detailed specifications and technical data for Simplicity 404 990390

Power

Power (gross)	4 hp (3.0 kW)

Engine

Type	gasoline
Model	Briggs & Stratton 100000
Cooling	air-cooled
Cylinders	1-cylinder
Bore/Stroke	2.50x2.125 inches (64 x 54 mm)
Displacement	170 cc (10.4 ci)
Starter type	manual recoil
Power (gross)	4 hp (3.0 kW)

Dimensions

Rear tire	13x5.00-6
Front tire	10x2.75
Lawn/turf rear	13x5.00-6
Lawn/turf front	10x2.75
Shipping weight	237 lbs (107 kg)

Electrical

Starter type	manual recoil

Production

Type	Riding lawn mower
Series	Wonder Boy Series
Built in	Port Washington, Wisconsin, USA
Manufacturer	Simplicity (a part of Allis Chalmers)
Original price	$280 in 1967
Years produced	1967 - 1968

Attachments

Blade	36" Blade, Simplicty 335, front-mount, 36 inches width (91 cm), manual-lift, manual-angle
24" mid-mount mower deck	mid-mount Simplicity 990358, 1-blade, 24 inches (60 cm) cutting width, 60 lbs (27 kg) weight, cut height 1.625 to 2.75 inch (4 to 6 cm)

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