The Farmall B tractor is available with one of two engines. Consumers have access to Farmall B tractors that feature a C113 vertical I-head, gas-powered, liquid-cooled engine manufactured by International Harvester. The Farmall B International Harvester C113 engine is a four-cylinder engine that features a natural aspiration and a 3.00- by 4.00-inch bore and stroke. The total piston displacement on this engine is 113.1 cubic inches.
An optional engine for the Farmall B tractor is also a vertical I-head International Harvester engine but this liquid-cooled engine runs on kerosene. This four-cylinder, natural-aspiration engine also offers a 3.00- by 4.00-inch bore and stroke. Displacement on this four-cylinder engine is 113.1 cubic inches.
Several tests were performed on the Farmall B to quantify the tractor's performance levels. Testing took place on gas-powered models between September 25 and 29 in 1939. The gas-powered tractor offered 18.39-horsepower maximum belt power. This tractor's maximum tested drawbar power was 16.21 horsepower and maximum tested drawbar pull was 2,377 pounds.
Between October 9 and 13, 1939, the kerosene Farmall B was tested for performance. This tractor's maximum belt power topped off at 16 horsepower. Maximum tested drawbar power offered by this tractor was 14.73 horsepower and maximum drawbar pull was 2,463 pounds.
The Farmall B tractor weighs 2,400 pounds. This tractor is 108 inches long and 101 inches wide. The distance from the ground to the highest point on this tractor measures 65 inches. Several different-sized front tires can be fitted onto this tractor: 6-12, 4-15 or 5-15 front agricultural tires and 9-24 rear agricultural tires.
The International Harvester Farmall B is a two-wheel-drive tractor. It features a sliding-gear transmission that offers four forward gears as well as a single reverse gear. Farmall Bs with gas-powered engines can accommodate 13.5 quarts of engine coolant and 5 quarts of engine oil. Models with the kerosene engine offer a 13.5-quart engine coolant capacity.