Introduction
Gravely 8171 Garden Tractor
The Gravely 8171 is a classic garden tractor produced in the late 1970s. Designed for residential property maintenance and landscaping tasks, it represents a period of robust, mechanical-focused engineering in small-scale utility machinery.
Engine and Powertrain
The tractor is powered by an Onan CCKA engine, an air-cooled, horizontal-shaft, opposed-twin gasoline unit. With a displacement of 816 cc, it generates a gross power output of 16.5 hp (12.3 kW). The engine is paired with a shaft-driven gear transmission that provides 8 forward and 4 reverse gears, utilizing a two-range system (low/high) coupled with a directional control lever.
Hydraulics and PTO
The hydraulic system is an 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). For implement operation, the machine features an independent mid-mounted Power Take-Off (PTO) engaged via a mechanical clutch.
Chassis and Handling
Built on a two-wheel drive platform, the 8171 utilizes manual steering and mechanical band brakes. It sits on a 48-inch wheelbase with an overall width of 41.75 inches, providing stability for lawn maintenance. The tractor is equipped with turf-specific tires, measuring 16x7.50-8 on the front and 23x10.50-12 on the rear.
Conclusion
With a shipping weight of 935 lbs and a compact design, the Gravely 8171 is suited for homeowners and collectors requiring a durable, gear-driven machine for standard property maintenance and attachment-based lawn work.
Production Information of Gravely lawn tractors, 8171
- Garden tractor
| Manufacturer | Gravely |
|---|
Dimension and Tires Information of Gravely lawn tractors, 8171
| Wheelbase | 48 inches [121 cm] |
|---|---|
| Shipping weight | 935 lbs [424 kg] |
| Height | 43 inches [109 cm] |
| Length | 75.5 inches [191 cm] |
| Ground clearance | 7 inches [17 cm] |
| Width | 41.75 inches [106 cm] |
| Lawn/turf front | 16x7.50-8 |
|---|---|
| Lawn/turf rear | 23x10.50-12 |
Engine Specifications of Gravely lawn tractors, 8171
- Onan CCKA
- Air-cooled horizontal-shaft opposed-twin
- Gasoline
- 2-cylinder
| Power (gross) | 16.5 hp [12.3 kW] |
|---|---|
| Displacement | 816 cc [49.8 ci] |
| Starter | Electric |
| Bore/Stroke | 3.00x3.25 inches [76 x 83 mm] |
| Oil capacity | 2 qts [1.9 L] |
| Starter volts | 12 |
Transmission Information of Gravely lawn tractors, 8171
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, 8171
- Two-wheel drive
- Open operator station.
- Manual steering
- Mechanical band brakes
Power Information of Gravely lawn tractors, 8171
| Mid PTO | Independent |
|---|---|
| Clutch | Mechanical |
Hydraulics Specifications of Gravely lawn tractors, 8171
| 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, 8171
| Ground | Negative |
|---|---|
| Battery AH | 42 |
| Battery volts | 12 |
| Charging system | Flywheel alternator |
| Charging amps | 15 |
Where it sits
Its power puts it in the 95th percentile of 1970s models in our database (1008 machines).
Frequently asked questions
How much horsepower does the Gravely lawn tractors 8171 have?
The Gravely lawn tractors 8171 delivers 16 HP.
What years was the Gravely lawn tractors 8171 produced?
The Gravely lawn tractors 8171 was produced in 1978.
What engine does the Gravely lawn tractors 8171 have?
The Gravely lawn tractors 8171 is powered by a Gasoline, 2-cylinder engine.
What transmission does the Gravely lawn tractors 8171 use?
The Gravely lawn tractors 8171 uses a Shaft-driven gear transmission.
How much does the Gravely lawn tractors 8171 weigh?
The Gravely lawn tractors 8171 weighs 935 lbs [424 kg].
Is the Gravely lawn tractors 8171 4WD?
The Gravely lawn tractors 8171 is available in 2WD.