Two .010 Oversize Pistons with Chrome Rings for Onan B and P Series Twins This listing includes two .010 inch oversize pistons, each with a chrome ring set, one for each cylinder of the Onan twin. The bore is 3.260 inches - .010 over the 3.250 standard bore. It replaces Onan part number 0112-0264-10. Because the pistons and rings ship as a matched set, no ring-style measurement is needed. Fitment Fits Onan 3.25 inch B-series and P-series twin-cylinder engines that have been machined .010 inch oversize, including B43, B43E, B48, B48M, P216, P218, and P220 and their G variants. This set is specifically for cylinders bored to 3.260 inches. If your cylinders are standard bore, order the standard piston set; if bored .020 inch, order the .020 set. Confirm the bore with your machinist before ordering. Balance and Related Parts The two pistons are weight-matched to keep the twin engine in balance. This engine family is also served by a standard-bore piston and ring set, ring-only sets, a rebuild kit that adds gaskets and seals, and connecting rods for a deeper rebuild.
- Two .010 inch oversize pistons, each complete with a chrome ring set, a wrist pin, and retaining clips, one for each cylinder of the Onan B-series or P-series twin. The bore is 3.260 inches (.010 over the 3.250 standard). Replaces Onan 0112-0264-10. Because the pistons and rings are a matched set, no ring-style verification is needed.
- Fits Onan 3.25 inch B-series and P-series twins machined .010 inch oversize, including B43, B43E, B48, B48M, P216, P218, and P220 (and the G variants).
- This set is for cylinders that have been bored .010 inch oversize to 3.260 inches. If your cylinders are standard bore, order the standard piston set; if bored .020, order the .020 set. Confirm your bore with your machinist before ordering.
- The two pistons are weight-matched to keep the twin engine in balance, and the rings are chrome-faced. Use a ring compressor and check the ring end gap during assembly.
- This engine family is also served by a standard-bore piston and ring set, ring-only sets, a rebuild kit that adds gaskets and seals, and connecting rods for a deeper rebuild.