McCormick-Deering W-9

International Harvester 5.5L 4-cyl gasoline

Bore × stroke

4.4 in × 5.5 in

Rated speed

1,500 rpm

Compression

5.4:1

Cooling

liquid-cooled vertical I-head

Notes

The gasoline engine was standard on the I-9, and an option on the W-9 until 1947, when it became the standard engine.

International Harvester 5.5L 4-cyl distillate

Bore × stroke

4.4 in × 5.5 in

Rated speed

1,500 rpm

Cooling

liquid-cooled

Notes

The all-fuel engine was designed for tractor fuel and gasoline lower than 70 octane. It was the standard W-9 and WR-9 engine until 1947, when the gasoline engine became standard and the all-fuel engine was an option. The all-fuel engine was an option for the I-9.

5-speed sliding gear: Fifth gear was locked out on tractors equipped with steel wheels.