Rock Island G2 15-25
The Rock Island G2 15-25 is a tractor produced by Rock Island. It is equipped with a 326 ci 5.3 L engine. The rated power output is 35.69 hp 26.6 kW. Transmission: 2 forward and 1 reverse. Operating weight: 4,200 lbs 1905 kg.
Engine Power
35.69 hp
26.6 kW
Fuel & Capacities
21 gal
79.5 L
Transmission
2 forward and 1 reverse
Operating Weight
4,200 lbs
1905 kg
Rock Island G2 15-25 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
 | 1929 - 1932
Standard-tread tractor |
|---|---|
1929 - 1932 | |
Standard-tread tractor | |
Production | |
|---|---|
Manufacturer | Rock Island |
Standard-tread tractor | |
Built in Rock Island, Illinois, USA | |
Rock Island G2 15-25 Engine | |
|---|---|
Waukesha 5.3L 4-cyl kerosene | |
Fuel tank | 21 gal
79.5 L |
Aux. fuel | 3.5 gal
13.2 L |
Engine details ...  | |
Rock Island G2 15-25 Transmission | |
|---|---|
2-speed unsynchronized gear | |
Transmission details ...  |
Rock Island G2 15-25 Power | |
|---|---|
Drawbar (claimed) | 15 hp
11.2 kW |
Belt (claimed) | 25 hp
18.6 kW |
Drawbar (tested) | 25.50 hp
19.0 kW |
Belt (tested) | 35.69 hp
26.6 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two-wheel drive | |
Steering | manual |
Open operator station. | |
Dimensions & Tires | |
|---|---|
Weight | 4,200 lbs
1905 kg |
Full dimensions and tires ...  | |
Links | |
|---|---|
G2 restoration site: | |
G2 at RIPC site: |
Engine
Engine Detail — 326 ci / 5.3 L Kerosene
Manufacturer | Waukesha |
Fuel Type | Kerosene |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 326 ci
5.3 L |
Bore/Stroke | 4.25x5.75 inches
108 x 146 mm |
Rated RPM | 1100 |
Transmission
Transmission — 2 forward and 1 reverse unsynchronized gear
Type | unsynchronized gear |
Gears | 2 forward and 1 reverse |
 | |
Dimensions
Rock Island G2 15-25 Tires |
|---|
Dimensions | |
|---|---|
Weight | 4,200 lbs
1905 kg |
Tests
Tractor Tests | |
|---|---|
NTTL 157: kerosene 2-speed 2WD | |
NTTL 158: gasoline 2-speed 2WD |
Nebraska Tractor Test 157 | |
|---|---|
Kerosene 2-speed 2WD
April 24 - May 3, 1929
Link: Nebraska Tractor Test 157 file | |
Belt power (max) | 29.00 hp
21.6 kW |
Belt fuel use (max) | 3.6 gal/hour
13.6 l/hour |
Drawbar performance | |
Max power | 22.08 hp
16.5 kW |
Max pull | 2,880 lbs
1306 kg |
Nebraska Tractor Test 158 | |
|---|---|
Gasoline 2-speed 2WD
May 4 - 8, 1929
Link: Nebraska Tractor Test 158 file | |
Belt power (max) | 35.69 hp
26.6 kW |
Belt fuel use (max) | 3.9 gal/hour
14.8 l/hour |
Drawbar performance | |
Max power | 25.50 hp
19.0 kW |
Max pull | 3,549 lbs
1609 kg |
Photos
Rock Island G2 15-25
Related models
Rock Island F 18-35
- Power:
- 38.9
- Production years:
- 1927 - 1937
Rock Island G 15-25
- Power:
- 27.8
- Production years:
- 1927 - 1928