Gravely Pro Master 20-H
The Gravely Pro Master 20-H is a tractor produced by Gravely Lawn Tractors. It is equipped with a 781 cc 47.7 ci engine. The rated power output is 20 hp 14.9 kW. Transmission: Eaton 850. Operating weight: 980 lbs*Weight with 60-inch mower 444 kg.
Engine Power
20 hp
14.9 kW
Fuel & Capacities
Gasoline
Transmission
Eaton 850
Operating Weight
980 lbs*Weight with 60-inch mower
444 kg
Gravely Lawn Tractors Gravely Pro Master 20-H Serial Number & Year Decoder
Find the exact manufacture year of your tractor by checking your chassis serial number below.
Where to Find the Serial NumberThe serial number plate is commonly located on the front frame, tractor transmission housing (right side), or instrument panel badge.
Overview
 | 1989 - 1991
Front-mount mower |
|---|---|
1989 - 1991 | |
Front-mount mower | |
1989 - 1991 | |
|---|---|
Front-mount mower |
Production | |
|---|---|
Manufacturer | Gravely (a part of Ariens) |
Front-mount mower | |
Gravely Pro Master 20-H Transmission | |
|---|---|
hydrostatic | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Disc brakes | |
Open operator station. |
Power Take-off (PTO) | |
|---|---|
Front PTO | independent |
Clutch | electric |
Dimensions & Tires | |
|---|---|
Weight | 980 lbs
444 kg |
Front tire | 18x8.50-8 |
Rear tire | 4.80/4.00-8 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging amps | 15 (Kohler) |
20 (Onan) | |
Battery volts | 12 |
References | |
|---|---|
 | |
Riding Tractors published in 1990, by Gravely |
Engine
| 1989 - 1991
Front-mount mower |
|---|---|
1989 - 1991 | |
Front-mount mower | |
1989 - 1991 | |
|---|---|
Front-mount mower |
Engine options | |
|---|---|
20HP Kohler 770cc 2-cyl gasoline | |
20HP Onan 781cc 2-cyl gasoline |
Engine Detail — 770 cc / 46.98 ci Gasoline
Manufacturer | Kohler M20 |
Fuel Type | Gasoline |
Configuration | 2-cylinder, air-cooled horizontal-shaft horizontally-opposed |
Displacement | 770 cc
46.98 ci |
Bore/Stroke | 3.12x3.06 inches
79 x 78 mm |
Power (gross) | 20 hp
14.9 kW |
Starter | electric |
Starter volts | 12 |
Oil capacity | 2 qts
1.9 L |
Engine Detail — 781 cc / 47.7 ci Gasoline
Manufacturer | Onan |
Fuel Type | Gasoline |
Configuration | 2-cylinder, air-cooled |
Displacement | 781 cc
47.7 ci |
Bore/Stroke | 3.258x2.875 inches
83 x 73 mm |
Power | 20 hp
14.9 kW |
Transmission
| 1989 - 1991
Front-mount mower |
|---|---|
1989 - 1991 | |
Front-mount mower | |
1989 - 1991 | |
|---|---|
Front-mount mower |
Transmission — Eaton 850
Transmission | Eaton 850 |
Type | hydrostatic |
Gears | infinite forward and reverse |
Oil capacity | 6 qts
5.7 L |
 | |
Dimensions
| 1989 - 1991
Front-mount mower |
|---|---|
1989 - 1991 | |
Front-mount mower | |
1989 - 1991 | |
|---|---|
Front-mount mower |
Gravely Pro Master 20-H Tires | |
|---|---|
Lawn/turf front | 18x8.50-8 |
Lawn/turf rear | 4.80/4.00-8 |
Dimensions | |
|---|---|
Length | 105 inches
266 cm |
Height | 48 inches
121 cm |
Weight | 980 lbs*Weight with 60-inch mower
444 kg |
Attachments
| 1989 - 1991
Front-mount mower |
|---|---|
1989 - 1991 | |
Front-mount mower | |
1989 - 1991 | |
|---|---|
Front-mount mower |
Attachment overview | |
|---|---|
50" front-mount mower deck | |
60" front-mount mower deck |
Photos
Gravely Pro Master 20-H tractor photo
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