Wow. it's been a while since I posted that. Igot it back and put it in a Tiger 2. The plane never landed with the engine running. 12 flights, all deadsticks. The last one planted the engine about six inches down in the dirt. Broke the carb off. Good riddance. My experience with the Aviastar brand was not good. The .53 I bought broke the conrod on the second breakin tank. I just threw it in the trash with the .46. I'll stick with Magnum and YS.