New HP Rating Net Power 4.6 (Old rating 5.5) O.H.V. design. HORIZONTAL SHAFT Recoil Start, 3/4” Dia. x 2-7/16” Keyed Crankshaft. PLEASE make sure you compare your engine crankshaft size with this Crankshaft size  Full Keyway Crankshaft Drilled/Tapped 5/16-24 Manual Choke & Throttle Tapped Bearing Plate, with 4 Mounting Hole on a 1-3/4” Radius “ON-OFF” Switch Low Oil Alert For General Purpose Applications: Commercial Lawn and Garden equipment Tractors Constuction/industrial equipment Agricultural equipment Small vehicles ***We are not responsible for the fitness.  Don't assume that this will work for you just because your engine looks similar to this.  Compare and confirm thecrankshaft measurement and all other specifications before purchasing.