I had all sorts of issues with the Evo series. I had a .46, a 61, and a 100 NX. The .46 ran well at first, but it too began to eat plugs, then it would not run more than a few minutes and would dead-stick on me. No one could figure out what was wrong with it. I eventually sold them all.

However, one key thing that I learned about them was that they really needed the correct mixture at both ends (high speed and idle) to run right. To lean, and they would burn up plugs. To rich and the engines would not run worth a darn. It takes time and patients, and determination because you are working at both ends.. mixture AND glow plug issues.

CGr