Gravely 812

The Gravely 812 is a garden tractor model from the 800 series, manufactured from 1973 to 1978 by Gravely. It was available in a two-wheel drive (2WD) version.

The Gravely 812 is equipped with a 476 L (29.0 cu·in) single-cylinder gasoline engine with 85.7 mm (3.37 in) of the cylinder bore and 82.6 mm (3.25 in) of the piston stroke, and shaft-driven gear transmission with 8 forward and 4 reverse gears.

The Gravely 812 garden tractor features:

• The Kohler K301 gasoline engine which produces 12.1 PS (8.9 kW; 12.0 HP) at 3,600 rpm of horsepower
• Manual steering
• Open operator station

General specifications

General Specifications
Model	Gravely 812
Tractor type	Garden tractor
Production years	1973-1978
Factory	–
Dimensions and weight
Length	1,910 mm (75.2 in)
Width	920 mm (36.2 in)
Height	1,090 mm (42.9 in)
Wheel base	–
Weight (shipping)	408 kg (899 lbs)
Fuel capacity
Fuel tank capacity	20.1 liters (5.3 US gal.; 4.4 Imp. gal)

Engine

Engine Specifications
Engine model	Kohler K301
Engine type	4-stroke, L-head (side valve), single-cylinder
Displacement	476 cm3, (29.0 cu·in)
Bore and stroke	85.7 mm X 82.6 mm (3.37 in X 3.25 in)
Compression ratio	6.0:1
Max. horsepower	12.2 PS (9.0 kW; 12.0 HP) at 3,600 rpm
Cooling system	Forced air
Lubricating system	Splash type
Fuel system	Carburetor
Starting system	Electirc starter
Compression pressure
Normal:	7.7-8.4 kg/cm2 (7.6-8.3 bar, 110-120 psi) / 1,000 rpm
Valve clearance
Intake valve clearance:	0.20-0.25 mm (0.0079-0.0098 in)
Exhaust valve clearance:	0.43-0.48 mm (0.0169-0.0189 in)
Oil system
Lubrication system:	Splash type
Oil type:	API SF or SG
Recommended oil:	Summer: SAE 30W Winter: SAE 5W-20, 5W-30
Oil capacity:	1.88 L (1.99 US.qts, 1.65 Imp. qts)
Ignition system
Spark plug:	Champion RH10
Spark plug gap:	0.65 mm (0.0256 in)
Spark plug torque:	27 N·m (2.8 kg·m, 19.9 ft·lb)

Transmission and chassis

Chassis, steering and brakes
Chassis	4×2 2WD
Steering type	Manual
Brakes	–
Transmission
Transmission manufacturer or model	–
Transmission type	Shaft-driven gear
Gears	8 forward and 4 reverse
Speed	Forward: 13.5 kmh (8.4 mph) Reverse: 6.0 kmh (3.7 mph)
Transmission oil capacity	5.7 L (1.5 US. gal, 1.3 Imp. gal.)

Tires

Tires
Front tires	Lawn/turf: 16×6.50-8
Rear tires	Lawn/turf: 23×8.50-12

Electrical system

Electrical system
Ground	Negative
Charging system	–
Charging amps	–
Battery	12V, 43Ah, Group 22F

Attachments

Gravely 21296: 40″ mid-mount mower deck with 3-blade, manual or hydraulic (optional) lift
Cutting width	1,010 mm (40 in)
Gravely 221297: 50″ mid-mount mower deck with 3-blade, manual or hydraulic (optional) lift
Cutting width	1,270 mm (50 in)
Weight	118 kg (262 lbs)
Gravely 48″ front-mount blade
Width	1,210 mm (48 in)
Gravely 20981: 38″ front-mount snow blower
Cutting width	960 mm (38 in)
Weight	113 kg (250 lbs)
Gravely 20982: 44″ front-mount snow blower
Width	1,110 mm (44 in)
Weight	117 kg (260 lbs)