This was bought quite a few years ago now as I had a notion to make some sort of test stand for it so I could fire it up for the crack !! It's a converted flat six Continental light aircraft engine, done for the US military for portable power applications. It's self contained with a 24v alternator and self starter, with a big fan at one end for cooling. I've never had it running but it has storage oil in the sump, it does turn over and the mag sparks. Great toy but one too many for me now !!