McCormick I-12 G
Built: 5/1937–1939 · Series: F-12 Baureihe
More machines from model year 1937
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McCormick International F-12 series: the I-12 G (1937-1939) with a four-cylinder petrol engine, 1,853 cm³ displacement, 15 hp/11 kW output and a weight of 1,850 kg
The F-12 series belongs to the generation of early row-crop tractors with a narrow, tall-built design that, in the 1930s, marked the shift from horse-drawn teams to motorised field work on smaller and medium farms. The I-12 G continues this design with a classic tricycle front axle.
Read on 3 more paragraphs
The I-12 G has a four-cylinder petrol engine with water-circulation cooling and 1,853 cm³ displacement, producing 15 hp, or 11 kW, at a rated speed of 1,400 rpm. At 1,850 kg, with a 1,500 mm wheelbase, a length of 2,520 mm and a width of 1,340 mm against a height of only 1,360 mm, it shows the narrow, tall-legged build typical of this pre-war generation for row-crop work.
With a top speed of 18 km/h, the I-12 G falls under Germany's driving licence category T. A petrol engine with water-circulation cooling and no circulation pump was, for its time, a simple but low-maintenance solution relying on thermosiphon action rather than a mechanically driven cooling system.
When buying such an old petrol tractor, the cylinder head gasket, the condition of the pump-less cooling system and the ignition wiring are especially important, since parts of this age are often reproductions or improvised. Frame cracks and the condition of the narrow front axle also deserve a close inspection on this tall-built design.
Sources: SpecCodex-Register: Kennwerte des Modells I-12 G, McCormick
Technical data
Engine
| Fuel | petrolcorrect |
|---|---|
| Power | 15 hp (11 kW)correct |
| Rated speed | 1,400 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 1,853 cm³correct |
| Bore | 76.2 mmcorrect |
| Stroke | 101.6 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 2,520 mmcorrect |
|---|---|
| Width | 1,340 mmcorrect |
| Height | 1,360 mmcorrect |
| Wheelbase | 1,500 mmcorrect |
| Ground clearance | 220 mmcorrect |
| Unladen weight | 1,850 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 3 V/1 Rcorrect |
| Forward gears | 3correct |
| Reverse gears | 1correct |
| Front tyres | 6.00-16correct |
| Rear tyres | 11.25-24correct |
| Top speed | 18 km/hcorrect |
Working data
| Fuel tank capacity | 55 lcorrect |
|---|
Origin and approval
| Construction | unit construction with subframecorrect |
|---|---|
| Units built | 49correct |
Where this model stands
Power-to-weight ratio: 5.9 kW/t (11 kW / 1.9 t)
Power class: Compact (< 40 hp)
Stronger than 3% of the tractors in the register — out of 15,663 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the McCormick I-12 G have?
The McCormick I-12 G delivers 15 hp.
How much does the McCormick I-12 G weigh?
The unladen weight is 1,850 kg.
What engine does the McCormick I-12 G have?
4 cylinders, 1,853 cm³ displacement, Benzin.
How fast does the McCormick I-12 G go?
Top speed is 18 km/h.
What are the dimensions of the McCormick I-12 G?
2,520 mm × 1,340 mm × 1,360 mm.
When was the McCormick I-12 G built?
Production years: 5/1937–1939.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 26 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Sources: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · Values adopted and presented in our own form; changes from the source are possible. · How we check the data
Tractor in 3D section
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