The engine was first running on 14 August 04. A few minor adjustments, and away it went! It runs better on regular gas than coleman fuel, but that's OK. I have it set to "hit" about one out of five or six times, with no load. Load it down and she hits every cycle. This is my best engine so far, (best running and best looking), and the most challenging. I am now ready to purchase another set of castings, since this one is now up for sale.