Gravely lawn tractors 8121
Power
12 hp
Production
1978
Engine
Gasoline, 1-cylinder
Transmission
Shaft-driven gear
Weight
890 lbs [403 kg]
Drive
2WD
From the same series:
Introduction
Gravely 8121 Garden Tractor
The Gravely 8121 is a compact garden tractor introduced in 1978, designed for residential landscaping and light agricultural tasks. It belongs to the Gravely 8000 series, characterized by a robust, air-cooled mechanical architecture.
Engine and Powertrain
The tractor is powered by a Kohler K301 single-cylinder gasoline engine with a displacement of 476 cc. This air-cooled, horizontal-shaft engine produces a gross power output of 12 hp (8.9 kW). Starting is facilitated by a 12-volt electric starter system. The transmission is a shaft-driven gear type, providing 8 forward and 4 reverse speeds, featuring a dual-range configuration with a directional control lever.
Mechanical and Hydraulic Systems
The 8121 operates as a two-wheel drive machine utilizing manual steering and mechanical band brakes. It includes an independent mid-mounted PTO (Power Take-Off) engaged via a mechanical clutch. The hydraulic system is of the open-center type, operating at a pressure of 1200 psi (82.7 bar) with a pump flow rate of 1.7 gpm (6.4 lpm) and a fluid capacity of 0.375 gallons.
Dimensions and Chassis
Built on a 48-inch wheelbase, the tractor features an open operator station design. It measures 75.5 inches in length and 36.375 inches in width, with a ground clearance of 7 inches. The shipping weight is approximately 890 lbs. The tractor is equipped with lawn and turf tires, specifically 16x7.50-8 on the front and 23x10.50-12 on the rear.
Conclusion
The Gravely 8121 serves as a durable, entry-level utility tractor suitable for homeowners and hobbyists requiring a reliable platform for mowing and basic implement operation.
Production Information of Gravely lawn tractors, 8121
- Garden tractor
| Manufacturer | Gravely |
|---|
Dimension and Tires Information of Gravely lawn tractors, 8121
| Wheelbase | 48 inches [121 cm] |
|---|---|
| Shipping weight | 890 lbs [403 kg] |
| Height | 43 inches [109 cm] |
| Length | 75.5 inches [191 cm] |
| Ground clearance | 7 inches [17 cm] |
| Width | 36.375 inches [92 cm] |
| Lawn/turf front | 16x7.50-8 |
|---|---|
| Lawn/turf rear | 23x10.50-12 |
Engine Specifications of Gravely lawn tractors, 8121
- Kohler K301
- Air-cooled horizontal-shaft
- Gasoline
- 1-cylinder
| Power (gross) | 12 hp [8.9 kW] |
|---|---|
| Displacement | 476 cc [29.07 ci] |
| Starter | Electric |
| Bore/Stroke | 3.258x3.37 inches [83 x 86 mm] |
| Oil capacity | 2 qts [1.9 L] |
| Starter volts | 12 |
Transmission Information of Gravely lawn tractors, 8121
Transmission variants 1
- Four gears (1-4) in two ranges (low/high) with directional control lever (forward/reverse). Reverse speeds are the same in high or low range.
| Type | Shaft-driven gear |
|---|---|
| Gears | 8 forward and 4 reverse |
Mechanical Specs of Gravely lawn tractors, 8121
- Two-wheel drive
- Open operator station.
- Manual steering
- Mechanical band brakes
Power Information of Gravely lawn tractors, 8121
| Mid PTO | Independent |
|---|---|
| Clutch | Mechanical |
Hydraulics Specifications of Gravely lawn tractors, 8121
| Type | Open center |
|---|---|
| Pump flow | 1.7 gpm [6.4 lpm] |
| Capacity | 0.375 gal [1.4 L] |
| Pressure | 1200 psi [82.7 bar] |
Electrical System of Gravely lawn tractors, 8121
| Ground | Negative |
|---|---|
| Battery AH | 42 |
| Battery volts | 12 |
| Charging system | Flywheel alternator |
| Charging amps | 15 |
Where it sits
With 12 HP, the Gravely lawn tractors 8121 sits just below 8160 (16 HP) in Gravely lawn tractors's range. Its power puts it in the 76th percentile of 1970s models in our database (1008 machines).
Frequently asked questions
How much horsepower does the Gravely lawn tractors 8121 have?
The Gravely lawn tractors 8121 delivers 12 HP.
What years was the Gravely lawn tractors 8121 produced?
The Gravely lawn tractors 8121 was produced in 1978.
What engine does the Gravely lawn tractors 8121 have?
The Gravely lawn tractors 8121 is powered by a Gasoline, 1-cylinder engine.
What transmission does the Gravely lawn tractors 8121 use?
The Gravely lawn tractors 8121 uses a Shaft-driven gear transmission.
How much does the Gravely lawn tractors 8121 weigh?
The Gravely lawn tractors 8121 weighs 890 lbs [403 kg].
Is the Gravely lawn tractors 8121 4WD?
The Gravely lawn tractors 8121 is available in 2WD.