FactoryPure delivered the generator when I was told by two other companies it was back-ordered. It arrived without any shipment notice or tracking - it sounds like perhaps Cummins did not provide FP a ship confirmation. I took it out of the box, followed the instructions however it would not start. Finally 45 minutes later after contacting both FP and Cummins it did start but it would not hold a load. I had to take it 50 minutes away to a Cummins service center since neither Cummins or FP accepts returns on this product. It still seems a little finicky, it starts but kills immediately if it has even a minimal load i.e charging a battery. If I let it warm up a minute than it seems to work OK. The jury is out on the Onan P2500 for me. FP was very pleasant on the phone but it didn't seem like they and Cummins are in synch on C/S procedures.
After receiving my order, just I'm following the instructions, after fillout the oil and gas, just pulled the stream one time and immediately started running. Me I recommending used premium fuel gas 93.