This is a 1998 9.9, BABL-1204405 that just started to cutout.I found that if I removed the cowling the engine would run. Reinstall and chokes out with in a minute. I have removed and soaked the carb in carb cleaner and reinstalled. Engine did run smoother but still chokes out and stalls when the cowling is replaced. i have read the other posts regarding this and am not pinching any lines ect. I do seem to have some exhaust in and around the engine but not much? Would a little be enough to choke it? Cant spot the source either. Anyone offer a solution or suggestion . Thanks