I have a 60 hp Mariner OG381643 on a pontoon.Was running at 5000 rpm this weekend and it shut down to 3000.Compression is 110 in all cylinders.I am getting spark in all 3.I took the cover off carbs and when I rev it up a little it looks like it is blowing gas out of the bottom carb.it also has gas running out of the copper looking tube in that carb.Would that be a reed or what? Thanks