Onan Rings & Gasket Kit B43 B48 P216 P218 P220 Late 113-0310

Late-Style Ring and Gasket Kit for Onan 3.25-Inch Twins (113-0310) This kit combines two late-style standard-bore piston ring sets - one for each cylinder of the Onan opposed-twin - with a complete gasket set that includes crankshaft seals and valve seals. The rings replace Onan part number 113-0310. Bore size is 3.25 inches (82.55 mm), standard. Late-Style Pistons - Confirm Before Ordering These rings fit late-style pistons, which use 1.5 mm (.058 inch) top and second ring grooves and a 3.0 mm oil ring. The simplest check is to measure your top ring groove: 1.5 mm means this set (113-0310). If it measures 2.0 mm (.078 inch), you have early-style pistons and need ring set 113-0314 instead. Fitment Fits Onan B-series and P-series 3.25-inch opposed-twin engines with late-style pistons: B43, B48, P216, P218, and P220, including the G and V variants. Standard Bore and Related Kits This set is for cylinders at the standard 3.250-inch bore; for a bored-oversize cylinder, order the matching oversize ring set. For a rings-only option, the same 113-0310 late-style rings are available separately, and complete kits that add pistons, rods, or a valve set are available for a fuller rebuild.

• Includes a complete gasket set with crankshaft seals and valve seals, plus two late-style standard-bore ring sets, one for each cylinder of the Onan opposed-twin engine. Replaces Onan ring set 113-0310. Fits a 3.25 inch (82.55 mm) standard bore; the rings are 1.5 mm.
• Fits Onan B-series and P-series 3.25 inch opposed-twin engines with late-style pistons, including B43, B48, P216, P218, and P220 (and their G and V variants).
• For late-style pistons. Late pistons use 1.5 mm (.058 inch) top and second ring grooves with a 3.0 mm oil ring. Measure your top ring groove: 1.5 mm is this set. If it measures 2.0 mm (.078 inch), you have early-style pistons and need ring set 113-0314 instead.
• Sized for a standard 3.250 inch bore. If a cylinder has been machined oversize, order the ring set that matches that oversize instead. Confirm your bore and ring style before ordering.
• This engine family is also served by a late-style rings-only set, an early-style ring-and-gasket kit (113-0314), and complete kits that add pistons, connecting rods, or a valve set for a deeper rebuild.