... ) air cooled, 4stroke 2) 4HP, 6.5HP &10HP direct-injection fuel combustion system, 3) CE, EPA CERTIFIED diesel enginesingle-cylinder, Vertical, four-stroke, direct ... -injection, air cooled,ModelDY170F(E)DY178F(E)DY186F(E)DY186FA(E)TypeSingle-cylinder, Vertical, 4-stroke, air-cooled diesel engineCombustion SystemDirect ...