Hey guys,


I recently got a new OS .12CV-RX for my evader ST. Engine runs great however i think it came with a problem. i think it has an air leak.

Engine has never been able to prime or purge since first time. I have to blow on the pressure tube to get fuel in the carb/chamber.. and then it takes some pulls to fire it up... when i fire it up hot or 10mins after a run it takes 3-4 pulls, where previous engines fire up the first time when hot..

I've checked for leaks to the best of my abilities. Changed exhaust gasket, replaces fuel lines, removed in-line filter and checked for carb leaks with soapy water.. haven't been able to find a leak..

Am I overreacting? I mean engine runs good, and i think it holds tune (im on my 8th tank) and doesnt appear to get hot..

still is kinda frustrating that it's a brand new engine! I don't want to send it back to OS so they tell me it has nothing..

any suggestions???