Simplicity lawn tractors

Simplicity Yeoman 648

The Simplicity Yeoman 648 is a 1973 garden tractor from the Yeoman Series manufactured by Simplicity, a part of Allis Chalmers. It features an 8 hp Briggs & Stratton 318cc 1-cylinder gasoline engine with electric start, a 3-speed belt-driven gear transmission with 3 forward and 1 reverse gears, and two-wheel drive with manual steering. The tractor has a wheelbase of 36.5 inches, weighs 288 lbs, and includes a mid PTO with manual clutch. Attachments include a 32" mid-mount mower deck, snowblower, and blade, all with manual lift. The electrical system is 12 volts with negative ground.

Power-

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ModelYeoman 648

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Technical Specifications

Detailed specifications and technical data for Simplicity Yeoman 648

Power

Power (gross)	8 hp (6.0 kW)

Tires

Rear tire	16-7.50x8
Front tire	4.10/3.50x6

Engine

Type	gasoline
Model	Briggs & Stratton 190707
Cooling	air-cooled vertical-shaft
Starter	electric
Cylinders	1-cylinder
Bore/Stroke	3.00x2.75 inches (76 x 70 mm)
Displacement	318 cc (19.44 ci)
Power (gross)	8 hp (6.0 kW)
Starter volts	12

Dimensions

Width	30 inches (76 cm)
Length	53.5 inches (135 cm)
Weight	288 lbs (130 kg)
Wheelbase	36.5 inches (92 cm)
Rear tread	21.5 inches (54 cm)
Height (hood)	28.5 inches (72 cm)
Height (steering wheel)	33 inches (83 cm)

Electrical

Ground	negative
Battery volts	12

Production

Type	Garden tractor
Year	1973
Series	Yeoman Series
Manufacturer	Simplicity (a part of Allis Chalmers)

Attachments

Overview	32" mid-mount mower deck, snowblower, blade
42" Blade	Simplicity, front-mount, 42 inches width (106 cm), manual-lift
32" Mower deck	mid-mount Simplicity, 3-blade with manual lift, Cutting width 32 inches (81 cm), Cut height 1.625 to 3.125 inch (4 to 7 cm)
32" Snow blower	Simplicity, 32 inches width (81 cm), single-stage, front-mount, manual-lift

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