Lifan LF160F-AHQ 4 HP 118cc 4-Stroke OHV Industrial Grade Gas Engine with 6:1 Gear Reduction and 3/4" Keyway Shaft, Recoil and Start Universal Mounting Pattern Industrial grade OHV 4-stroke gasoline engine with .75" keyway shaft Compression release for E-Z starting - low oil shutdown engine protection General purpose engine with universal mounting plate: great for recreational vehicles, construction, farm, and ranch Single cylinder engine with 6:1 gear reduction reduces rpm at output shaft to 600 rpm, 0.75-in output shaft Replaces Honda, Briggs, Kohler, and other brands; EPA certified