HI, here is my problem, I have a 47 martin, 60 and it will start and run maybe 10 seconds and then it pops back through the carb once or twice and quits. if I choke it it will restart, I took the carb apart and cleaned it, still the same, took the carb apart again and cleaned it better, it acts like its to lean. I get good spark on both clys. anybody have any other ideas?