I hate to break the news, but Irvines DO wear out. My .36 has around 170 hours of operation, and the rod is getting a bit sloppy............it still runs great with absolute reliability, but the power is slightly down. With all those hours, I am on my second glow plug. I was so distressed by it's poor performance, that I bought 3 more NIB on that auction site.

Ripmax may say that GP is the distributer, but GP does not mention it in their product lineup.