Development of the J Engine Family-(7 - 40 hp, air or water cooled, gas, gasoline or diesel fuel)

The J Series of engines was developed after due consideration of durability, dependability, and flexibility, and the requirements of many users. The J Series consists of 12 engines; air-cooled gasoline and diesel, and marine water-cooled gasoline and diesel, each in 1-, 2-, and 4-cyl versions. The engines are fully described, with development background and reasons for many of the features.