my 76 Johnson keeps gushing fuel and collecting in the cowling, it looks like its coming out of the air intake of the bottom carb. it is extremely hard to get started. once i get it going it runs superbly, but if i let it sit for a while and fish with the trolling motor for more than about 15 mins. it is hard to start again and acts like its flooded. I have changed the needle and seat and it "seemed" to work for a while but now its doing the same thing. why is it gushing fuel and so darn hard to start ? but like I said once I get it going it runs great, but I have to start it every 10 mins. or so to keep it from flooding. Please help. Thank you