breaking in my 75 ax and have run 4 tanks thru on the rich side so im trying to get things set now (still on the stand) and i think ive got it close but im kinda confused about a couple things (1) when i try to start it the engine turns the opposite way which is a sign of being too rich but() when i do a pinch test it dies right away without reving up the least little bit which is a sign of not being rich enough so what do i need to do?