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Jacobsen Chief-O-Matic 1000

Jacobsen Chief-O-Matic 1000 tractor
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The Jacobsen Chief-O-Matic 1000 is a garden tractor introduced in 1966 by Jacobsen, built in Racine, Wisconsin, USA. It features a 10 hp Kohler K241 390cc 1-cylinder air-cooled gasoline engine, a belt-driven hydrostatic transmission with infinite forward and reverse speeds, and two-wheel drive with manual steering and mechanical band brakes. The tractor has an open operator station and a mid PTO with independent manual clutch. Dimensions include a 42 inch wheelbase, 61 inch length, and 33 inch width. Tires are lawn/turf type with front sizes 16x4.80-8 or 16x6.50-8 and rear sizes 22x6-12 or 22x8-12. Electrical system is 12 volts with negative ground. Attachments available include 36", 42", and 48" mid-mount mower decks, snowblowers, blades, and a front-end loader. The serial number plate is located on the left-front side of the tractor above the front axle.
Jacobsen Chief-O-Matic 1000garden tractor1966Kohler K241 enginehydrostatic transmissionlawn tractor specs
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ModelChief-O-Matic 1000

Technical Specifications

Detailed specifications and technical data for Jacobsen Chief-O-Matic 1000

Engine

Type:gasoline
Model:Kohler K241
Power:10 hp (7.5 kW)
Cooling:air-cooled horizontal-shaft
Starter:electric
Cylinders:1-cylinder
Fuel tank:1.25 gal (4.7 L)
Rated RPM:3600
Air cleaner:dry
Bore/Stroke:3.25x2.875 inches (83 x 73 mm)
Displacement:390 cc (23.85 ci)
Oil capacity:2.5 qts (2.4 L)
Starter volts:12

Dimensions

Width:33 inches (83 cm)
Length:61 inches (154 cm)
Rear tire:22x6-12, 22x8-12
Wheelbase:42 inches (106 cm)
Front tire:16x4.80-8, 16x6.50-8
Rear tread:31.5 inches (80 cm)
Front tread:30 inches (76 cm)
Height (hood):34.5 inches (87 cm)
Ground clearance:11.75 inches (frame) (29 cm)
Clearance (rear axle):6.25 inches (15 cm)
Clearance (front axle):8.75 inches (22 cm)
Height (steering wheel):39 inches (99 cm)

Electrical

Ground:negative
Battery volts:12

Mechanical

Drive:Two-wheel drive
Brakes:Mechanical band brakes
Steering:Manual steering
Operator station:Open operator station

Production

Type:Garden tractor
Built in:Racine, Wisconsin, USA
Manufacturer:Jacobsen
Year introduced:1966

References

Book:Chief Tractors published in 1966, by Jacobsen

Attachments

Blade:42 inches width (106 cm), front-mount
Snowblower:36 inches width (91 cm), single-stage, front-mount, manual-lift; 36 inches width (91 cm), two-stage, front-mount, manual-lift
Front-end loader:Danco JC 600 Loader, 300 lbs lift (full at pin) (136 kg), 52 inches clearance (level) (132 cm), Bucket width: 34 inches (86 cm)
36" mid-mount mower deck:36 inches (91 cm), 2-blade, manual lift, left-discharge, Cut height: 1.5 to 4 inch (3 to 10 cm)
42" mid-mount mower deck:42 inches (106 cm), 3-blade, manual lift, right-discharge, Cut height: 1.25 to 3 inch (3 to 7 cm)
48" mid-mount mower deck:48 inches (121 cm), 3-blade, manual lift, right-discharge

Transmission

Type:belt-driven hydrostatic
Gears:infinite forward and reverse

Power Take-off (PTO)

Type:independent
Clutch:manual
Location:Mid PTO

Serial Number Location

Location:Serial number plate on the left-front side of tractor, above the front axle.

Related Models

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Model:Super Chief 1000

Jacobsen Chief-O-Matic 800

Model:Chief-O-Matic 800

Jacobsen Chief-O-Matic 1200

Model:Chief-O-Matic 1200