P220 short block. I'm no expert, but according to the tag, this one is a Spec C with 1:48 shaft. Has new 010 piston and ring.. Standard main and rod were used. FYI: We have about 80 new and used Onan/Cummins short blocks. If you are looking for one contact me with as much info as you can give: Onan part #, Engine Model and Spec, shaft size, etc.What is a Short Block? Great question--I had to look it up myself. For Onan, a shorblock generally includes the crank case or cylinder block proper, all bearings, crankshaft, camshaft, timing gears, connecting rod(s), piston(s) and rings, valve train, and oil pump. It DOES NOT usually include the flywheel, ignition system, charging system, oil base, cylinder heads, oil fill tube and indicator, muffler or exhaust manifold, carburetor, choke, air cleaner, fuel tank, oil pickup tube and cup assembly, valve covers, gearcase cover, necessary studs and gaskets, or sheet metal parts.My promises as a seller:The item pictured is always the exact item you are looking on unless noted in the listing. I will try to describe the item, including any faults, as completely as possible. I’d like to use a lot more pictures. However, eCRATER’s fees add up, and this isn’t a big business for me. Please email me with any questions you have. I’ll respond ASAP. I will manage my listings with integrity and extend buyers the same courtesy I expect when I’m on the other side of the transaction. After all, I’d like positive feedback and repeat customers. If you are not satisfied with your item, simply return the item to me in the condition it was received. I will refund the entire purchase price including the original shipping costs. The buyer will have to pay to ship the item back to me. I reserve the right to retain an appropriate restocking fee if there is any change to the condition of the item (i.e. sealed package opened, obvious wear, damaged, etc.). Also, if you leave me negative or neutral feedback without first contacting me to resolve the matter, you have waived your right to a return or refund. Iship multiple times per week. This means if you pay through Paypal today, your item willoften be shipped tomorrow. Powered by eCRATER . List your items fast and easy and manage your active items.