So much for the potential fuel starvation being due to a dirty tank, or filter or fuel pump. Its either the carb or an electrical issue. That is all that is left.
Made it a couple of hundred yards from the landing tonight before it died. Wouldn't start right away so we dropped anchor to keep from floating further from the landing, let it cool down and I readjusted the idle mixture screws because restarting seems to have gotten worse since we messed with them last thursday.
Needless to say, we're pretty disgusted with this whole thing. Keep throwing money at it and get the same results. Like it has been said before, it does seem to be heat related and I thought maybe, just maybe, me bending a new line to the carb that didn't make an "s" turn behind the water pump and didn't have a small kink in it, would do the trick. If there was enough time and money, I'd just drop it off at a marine mechanic and be done with it.