My 94 Prostar 205 with the 350 TBI starts fine when its cold, but once it's up to temp if I let it sit a couple minutes it is hard to start. It use to take three or four tries, but this morning it was more like 7. It runs fine once it is started and will start up fine if you turn it off and then right back on. Anyone have any suggestions. I've got a private lake rented in a couple weeks and don't want my boat to die while we are there.