mercruiser 140

[pogden]

I just picked up a Searay Seville with a mercruiser 140 and I'm having a problem with shift/cutting out. It starts/idles/rev's in neutral great--but as soon as I shift into reverse it stalls and when I shift into forward it either stalls or stutters and won't accelerate much above a fast idle. This occurs 95% of the time, that other 5% it works great. Anyone have any ideas?

Thanks,
Pat