[Duane Eiskant II]

Myron is correct. We fix a lot of them at work in the carb shop. The closest Heli-coil is 12-24, you have to use it and run the hollow screw. The hollow screw takes up the difference in the mismatch of the threads, also if you go over a .035 squirter you need to run the hollow screw. The channel in the body there is only about .070 which is why you need to use the hollow screw.