Thanks guys for all the input! After spending the day tearing down and scrutinizing every last detail, I've come to the conclusion that the pump was turning and even if by chance it wasn't for the ten seconds this engine ran, it didn't cause the piston pin failure. Number 2 and number 5 pins were both galled terribly in the pin boss one of them so bad I broke the piston pressing the pin out. Also the bottom of the skirt on that one was galled due the the terrific side load due to the seized pin. All the others looked fine. The pins are not lubed by the pump anyway so it couldn't have caused the problem. My only explanation is that either I didn't lube the pins enough, or they were not fitted right. Anyway new pistons are enroute and I'm further educated in the school of hard knocks.
Randy
