Hello; I was "training" a newby at our field yesterday, He brought a new "Easy Flight" with a 40 LA in it. We checked it all over Then fired it up and had a flight. I had tuned it up for a safe flight, and it was runninng okay. I trimmed it out and handed it over to him. While he was flying around, he told me that it is the first flight ever for that engine. He did pretty well for awhile then the engine stopped, and I landed the plane with no damage. The head was too hot and oily.

A few other fellows wanted to fly, so I went on to the next student. When the fellow was ready to go again, he couldn't get the engine to start, we richened it up and got it to run, but it would bog when advancing the throttle. After trying a few things, we got it to throttle by leaning out the bottom one turn in ((air bleed screw), the engine ran, but just barely, and when it dead sticked, I brought it in right away and the head was almost cold. It could easily be held in your hand. Once again, the head was very oily.

We went back to the bench and re-fueled and fired it up; While it was running, there seemed to be oil running off the left side of the joint where the head attaches to the barrel. We tuned it up and had another flight, after trying to tighten the head screws. This time we only got 5 minutes on a full tank, and more oil all over the same spot.

Did we overheat it? and warp the head?

It runs, but not verywell, it seems to need to be re-tuned after every flight. What should I advise him to do?