A .010 oversize rebuild kit for the Onan B43, B48, P216, P218 and P220 opposed-twin engines. It contains pistons sized .010 over for a 3.260 inch bore, the complete gasket set and the crankcase seals. The standard bore on these engines is 3.250 inches, so these pistons fit only a cylinder bored .010 over; measure the finished bore before ordering. Read the model and spec on the engine nameplate. Before assembly, check piston-to-bore clearance, ring end gap and groove side clearance, clean every gasket face to bare metal and torque the heads in sequence.
- .010 OVERSIZE PISTONS, GASKETS AND SEALS - Pistons sized .010 over for a 3.260 inch bore, the complete gasket set and the crankcase seals.
- FITS ONAN B43, B48, P216, P218 AND P220 - The opposed twins on the 3.250 inch standard bore, found in garden tractors and generators.
- FOR A BORED CYLINDER ONLY - .010 over the 3.250 inch standard gives 3.260 inches. These pistons will not go into a standard bore; measure the finished bore, or ask the shop what it cut, before ordering.
- SAME BORE ACROSS THE FAMILY - The B43, B48, P216, P218 and P220 all share the 3.250 inch standard bore. Read the model and spec on the nameplate to confirm the engine before ordering.
- MEASURE BEFORE IT GOES TOGETHER - Check piston-to-bore clearance, ring end gap in the bore and side clearance in the groove, clean every gasket face to bare metal, and torque the heads in sequence.