NR Series 6175N reduction gearbox 3/4 inch shaft 6:1 gear reduction 8 hpNR Series reduction gearbox 6: 1 gear reduction Designed to fit most small (3 4 inch bore) 4 cycle engines Output shaft 3 4 inch diameter Keyway 3 16 inch Rated up to 8 hp Convenient bolt on design adapts to most engine makes and models Provides flexibility in engine selection by eliminating the need to purchase costly special engines with lengthy delivery lead times Constructed of rugged, aluminum castings and precision machined gears for maximum