Honda GX800-TAPP Engine 1 1/8" x 3-51/64" Shaft Horizontal Recoil 24.9 HPHonda GX800 TAPP Engine 1 1 8" x 3 51 64" Shaft Horizontal Recoil 24. 9 HP Not All Engines Are Created Equal. The iGX800 with Electronic Fuel Injection, Electric STR governor, Drive by Wire control, and a host of other advanced features help to maximize productivity and make the job easier. And of course, the same legendary Honda quality and reliability users expect. EFI Model 1 1 8 PTO, 27 AMP Charge Coil, Control Box, Oil Pressure Switch, Oil