I have an older Revo (the original one) with the 2.5r engine. The engine runs great once it starts, and I don't think it has ever stalled. The problem is getting it to start. I have put in a new glow plug, I have fresh fuel, no cuts in the fuel lines, both lights light up on the EZ start, the engine turns over fine, and I prime the engine just until I see the fuel touch the crankcase, and at that point, I take my finger off of the exaust nozzle. The way I see it, there should really be no reason that it shouldn't start....I have fuel, ignition and air...Can anyone think of what it could be, or what I could do to get it to start better??