Gravely lawn tractors

Gravely 812

The Gravely 812 is a garden tractor produced from 1973 to 1978 as part of the 800 Series. It features a 12 hp Kohler K301 476cc 1-cylinder gasoline engine, an 8-speed shaft-driven gear transmission with 8 forward and 4 reverse gears, and a weight of 900 lbs (408 kg). It has two-wheel drive, manual steering, and an open operator station. The tractor supports various attachments including 40" and 50" mid-mount mower decks, snowblowers, and blades.

Power12 hp

Founded40/50" deck

Model812

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Technical Specifications

Detailed specifications and technical data for Gravely 812

Engine

Type	gasoline
Model	Kohler K301
Power	12 hp (8.9 kW)
Cooling	air-cooled horizontal-shaft
Starter	electric
Cylinders	1-cylinder
Fuel tank	5.3 gal (20.1 L)
Rated RPM	3600
Bore/Stroke	3.25x3.37 inches (83 x 86 mm)
Displacement	476 cc (29.07 ci)
Oil capacity	2.5 qts (2.4 L)
Sparkplug gap	0.025 inches (0.635 mm)
Starter volts	12
Intake valve clearance	0.009 inches (0.229 mm)
Exhaust valve clearance	0.018 inches (0.457 mm)

Dimensions

Width	36.25 inches (92 cm)
Height	43 inches (109 cm)
Length	75.5 inches (191 cm)
Weight	900 lbs (408 kg)

Electrical

Ground	negative
Battery AH	43
Battery Group	22F
Battery volts	12

Production

Type	Garden tractor
Series	800 Series
Years produced	1973 - 1978

Attachments

48" Blade	Gravely, front-mount, 48 inches width (121 cm)
38" Snow blower	Gravely 20981, front-mount, 38 inches width (96 cm), 250 lbs (113 kg)
44" Snow blower	Gravely 20982, front-mount, 44 inches width (111 cm), 260 lbs (117 kg)
40" mid-mount mower deck	Gravely 21296, 40 inches (101 cm), 3-blade, manual lift, hydraulic lift (Optional)
50" mid-mount mower deck	Gravely 221297, 50 inches (127 cm), 3-blade, manual lift, hydraulic lift (Optional), 262 lbs (118 kg)

Transmission