For Honda GX160 6.5 HP 4-Stroke Gas Engine Replaces OHV Air Cooling System 160cc by admin on December 26, 2023 in honda Gas Engine Replaces For Honda GX160 6.5HP 160cc OHV Air Cooled Pullstart. Engine Type:Air Cooled, 4 Stroke Gasoline Engine, OHV, Single Cylinder. Overhead valve (OHV) design? . Horsepower:6.5HP(4.8kw).