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Tractor · 1929Unverified

Rock Island G2 15-25

Name: Rock Island G2 15-25
Brand: Rock Island

Rock Island G2 15-25 — Standard-tread tractor · 15 hp. Reference specifications; pending source verification.

The Rock Island G2 15-25 is a tractor with a rated power of 15 hp, falling into the lighter end of its class. It was manufactured between 1929 and 1932. The model features a 4-cylinder petrol liquid-cooled engine, paired with two-wheel drive and a 2-speed gearbox. Its operating weight is listed at 1905 kg, suitable for operations on up to 200 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

15 hp

Max power

16.5 kW

Weight

1905 kg

Catalogue coverage

Variants represented

Richest spec table

39 rows

Recorded power

15 hp

Recorded weight

1905 kg

Transmissions

2-speed unsynchronized gear

Production years

1929-1932

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerRock IslandReference

Standard-tread tractorReference

Built in Rock Island, Illinois, USAReference

Two-wheel driveReference

SteeringmanualReference

Open operator station.Reference

Engine

Waukesha 5.3L 4-cyl keroseneReference

Fuel tank79.5 LReference

Aux. fuel13.2 LReference

Drawbar (claimed)11.2 kWReference

Belt (claimed)18.6 kWReference

Drawbar (tested)19.0 kWReference

Belt (tested)26.6 kWReference

WaukeshaReference

keroseneReference

4-cylinderReference

liquid-cooledReference

Displacement5.3 LReference

Bore/Stroke108 x 146 mmReference

Rated RPM1100Reference

Belt power (max)21.6 kWReference

Max power16.5 kWReference

Belt power (max)26.6 kWReference

Max power19.0 kWReference

Transmission

2-speed unsynchronized gearReference

Typeunsynchronized gearReference

Gears2 forward and 1 reverseReference

Dimensions

Weight1905 kgReference

Links

G2 restoration site:Reference

G2 at RIPC site:Reference

Test results

NTTL 157: kerosene 2-speed 2WDReference

NTTL 158: gasoline 2-speed 2WDReference

Kerosene 2-speed 2WDApril 24 - May 3, 1929Link: Nebraska Tractor Test 157 fileReference

Belt fuel use (max)13.6 l/hourReference

Drawbar performanceReference

Max pull1306 kgReference

Gasoline 2-speed 2WDMay 4 - 8, 1929Link: Nebraska Tractor Test 158 fileReference

Belt fuel use (max)14.8 l/hourReference

Max pull1609 kgReference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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