Can someone offer me some suggestions? I inherited a 1965 Merc 900E Outboard. I tried to start it and it does turn over, there is spark, but it won't start. If I spray staring fluid into the carbs, it fires up and runs for a couple seconds. There is fuel delivery to all 3 carbs. And I took all 3 apart, cleaned them and checked the floats. Everything looks good. I did notice that fuel seems to flood out of the top-most carb and runs down over the other 2. Not a stream, just a dribble. Also, I think my starter might be going out, because it has difficulty turning over now. Battery is brand new and fully charged. I'm not that experienced with these old motors, I just learn as I go. At this point I'm frustrated and have spent many, many hours on this thing. Also, what octane fuel should I be using on this old motor? Thanks.