Hey all, kinda on the subject and off,I found a real cold Odonnell glow plug to try, but have not had the chance. RE the Ryobi 4 stroke I have been working with, I have it ready to go on my flying dyno (an 8ft Telemaster). I was doing some last minute runs on the test stand when it occurred to me to mix some "new" fuel. I have just taken up flying helis and had a new gallon of 30% heli fuel, so mixed gas/glow in the usual manner. I has just tached a WOT run @ 7400 with an 18x6 which was great. With 30%, 8300! This is an expensive mix (heli fuel is $30.00/gal) but it makes the four stroke rock and roll! besides the 4 stroke just sips fuel.