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Rock Island G2 (15-25) Specifications

Years Produced

1929 - 1932

 

Number Produced

Under 1,016 (Based on Engine Production Numbers)

 

 Waukesha Engine

Model CS4x (where x = D, F, possibly others)

4 Cylinder

326 Cubic Inches

4.25" Bore x 5.75" Stroke

1100 RPM Governor

2" Inlet Valve

1.75" Exhaust Valve

Ricardo "L" Head

 

Carburetor 

Stromberg Model M-2

 

Fuel Tanks 

3 1/2 Gallon Capacity Fuel Tank (Gasoline) 

21 Gallon Capacity Fuel Tank (Distillate)

 

Air Cleaners 

Pomona / Vortox Oil Bath  Model 670

Donaldson (Model Unknown)

 

Oil Filter Rectifier

Purolator Model B-15

 

Engine Oil 

SAE 30 for Winter Use

SAE 50 for Summer Use

12-15 lbs of Pressure at 1100 RPM

 

Transmission 

Low = 2.75 MPH

High = 4 MPH

Reverse = 1.75 MPH

Grease ~10 Gallons 600 Weight Body

 

Magneto 

Splitdorf Model 46T

STM Impulse Starter

Point Gap = .020"

Plug Gap = .022"

Firing Order = 1-2-4-3

 

Cooling System

Radiator (Tubular)

Capacity ~7 Gallons

 
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