ORIGINAL: Sport_Pilot
It's nice to enjoy the running quality they have until they're toasted.
The only aspect to good running quality was a quick break in. TT, Fox, and enen Tower engines seem to have better running qualities than the smaller OS engines.
My TT .46 had more power than the OS or maybe I simply tuned it better with the right prop and plug combo than the OS .46's at the field. RC Reports said the Fox .46 was the second most powerful they had reviewed, and the most powerful was the Rossi .46, but the Fox had a better carb as hard as that is to believe. Well better if you don't mind the crude needles.
I have never had a Fox engine with a poorly working carburetor, once you read and actually understood the instructions. That old flat blade Fox carb really gave the troops a hard time with its tune the low speed circuit first and then tune the high speed circuit routine. But mine worked flawlessly.
I like both Fox and Rossi. Both makes of carbs did the job that they were designed to do - and well.
Ed Cregger