I just purchased a 1.00 and upon inspection had found the o-ring which goes between the carb and intake missing. I called horizon and had a complete ring set sent to me in less than a week. Not only the ring I was missing but all needle rings and the metal 0-ring.
Once I installed the o-ring the engine ran flawlessly and within the limiters.
I flew my CMPro Corsair last sunday and had no problems whatsoever.
This is my first Evo engine and if it keeps running the way it did I'll definately buy others.
Hangar 9 did right by me. NO CHARGE
I'm going to order their "Super Plug".



Happy Flying

Tom