I rebuilt the predator 212 that was smoking and had a little blow by, and it runs much much better, but there is always something that goes wrong. I bought a cheap carb off ebay and it ran too rich with the .37 jet so switch it out with a .35 now having a issue with the carb leaking down the insulator plate and I know the o ring wasnt pinched or anything. I had the same issue with my old carb thats why I took it off. I had a thought that maybe there was a certain way the bowl went maybe? The carb didnt leak untill I swapped jets the second time. Thanks