I have a johnson 40 h.p. motor that has always ran great, but recently it has developed some kind of a fuel problem I think. The motor will start just fine, and go into gear but when I try to accelerate, it bogs out and dies. If im in nutreal and rev it up it will hesitate for a second, then it will clear out and rev up but when i'm in gear driving it will die upon accelerating unless I move the accelerator very very slow and slowly creep up to speed. I have fresh gas in it, and new plugs, any idea on what this could be? Thanks for any help.