Jacobsen lawn tractors

Jacobsen Chief 100

The Jacobsen Chief 100 is a garden tractor produced from 1961 to 1963 by Jacobsen in Racine, Wisconsin, USA. It features a 7 hp Kohler K161S 265cc 1-cylinder air-cooled gasoline engine with manual or optional electric start. The tractor has a 3-speed belt-driven gear transmission with 3 forward and 1 reverse gears, two-wheel drive, and manual steering. It has a wheelbase of 42 inches, length of 61 inches, width of 33 inches, and ground clearance of 7 inches. Tires are 4.00/4.80-8 front and 6.00-12 rear. Electrical system is 12 volts with negative ground. Attachments include a 36" mid-mount mower deck, snowblower, and blade. The original price was $570 in 1961.

Power-

Founded-

ModelChief 100

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Technical Specifications

Detailed specifications and technical data for Jacobsen Chief 100

Tires

Rear tire	6.00-12
Front tire	4.00/4.80-8

Engine

Type	gasoline
Model	Kohler K161S
Power	7 hp (5.2 kW)
Cooling	air-cooled horizontal-shaft
Starter	manual recoil, electric Optional
Cylinders	1-cylinder
Bore/Stroke	2.875x2.50 inches (73 x 64 mm)
Displacement	265 cc (16.22 ci)
Starter volts	12

Variants

100A	electric start
100B	manual start

Dimensions

Width	33 inches (83 cm)
Length	61 inches (154 cm)
Wheelbase	42 inches (106 cm)
Ground clearance	7 inches (17 cm)

Electrical

Ground	negative
Battery volts	12

Mechanical

Drive	Two-wheel drive
Steering	Manual steering
Operator station	Open operator station

Production

Type	Garden tractor
Built in	Racine, Wisconsin, USA
Manufacturer	Jacobsen
Original price	$570 in 1961
Years produced	1961 - 1963

Attachments

Blade	42 inches width (106 cm), front-mount
Snowblower	36 inches width (91 cm), front-mount
36" mid-mount mower deck	2-blade with manual lift, 36 inches (91 cm) cutting width

Transmission