Gravely 812

The Gravely 812 is a 2WD garden tractor from the 800 series. This tractor was manufactured by Gravely from 1973 to 1978. The Gravely 812 is equipped with a 0.5 L (29.0 cu·in) single-cylinder gasoline engine and a shaft-driven gear transmission with 8 forward and 4 reverse gears.

The Gravely 812 garden tractor used the Kohler K301 engine. It is a 0.5 L, 476 cm2, (29.0 cu·in) single-cylinder natural aspirated gasoline engine with 85.7 mm (3.37 in) of the cylinder bore and 82.6 mm (3.25 in) of the piston stroke. This engine produced 12.1 PS (8.9 kW; 12.0 HP) at 3,600 rpm of output power.

The Gravely 812 is equipped with manual steering, an open operator station, and 20.1 liters (5.3 US gal.; 4.4 Imp. gal) fuel tank.

Following attachments are available for the Gravely 812 garden tractor:

  • Mid-mount Gravely 21296: 1,010 mm (40 in) mower deck with 3-blade and manual or hydraulic (optional) lift
  • Mid-mount Gravely 221297: 1,270 mm (50 in) mower deck with 3-blade and manual or hydraulic (optional) lift
  • Front-mount Gravely: 1,210 mm (48 in) blade
  • Front-mount Gravely 20981: 960 mm (38 in) snow blower
  • Front-mount Gravely 20982: 1,110 mm (44 in) snow blower

Gravely 812 Specifications

General Specifications
Model Gravely 812
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 (900 lbs)
Fuel tank capacity 20.1 liters (5.3 US gal.; 4.4 Imp. gal)
Battery 12V, 43Ah, Group 22F
Cabin type Open operator station
Engine model Kohler K301
Engine type Four-stroke, air-cooled
Cylinders 1
Fuel type Gasoline
Displacement 0.5 L, 476 cm2, (29.0 cu·in)
Bore and stroke 85.7 mm X 82.6 mm (3.37 in X 3.25 in)
Horsepower 12.1 PS (8.9 kW; 12.0 HP) at 3,600 rpm
Starter Electric
Oil type SF or SG
Oil capacity: 2.4 L (2.5 US. qt, 2.1 Imp. qt.)
Spark plug Champion RH10
Transmission and chassis
Chassis 4×2 2WD
Steering type Manual
Transmission 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.)
Front tires Lawn/turf: 16×6.50-8
Rear tires Lawn/turf: 23×8.50-12
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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. In addition, the characteristics may vary depending on the modification and market. We do not provide advice on technical issues related to the any operation or repair. We do not recommend using provided information for repairing or spare parts ordering, use only official service manuals and spare-parts catalogs.

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