I started a bit more than a year ago with an Alpha trainer. I always had engine trouble. I spent far more time fiddling that flying and almost every flight ended in a dead stick landing. I finally got tired of it and put on a Thunder Tiger Pro .46. I broke it in as per the directions and put it on the plane. It starts right up, taxies out, flies until I want to land and taxies back with nary a cough or sputter. I sent the Evo back to Horizon under waranty. The crankshaft was misaligned. They replaced the crank and crankcase and a few other small bits and sent it right back. It is still on my shelf. It is probably fine now but it has bad Karma and I don't feel like putting it on anything. Excellent service. Maybe the engine would have run better on Lemon juice?

Jeff