I recently purchased an 1984 40E Mariner. <br />The motor starts and idles great. At 3/4 throttle it gets to 5000rpm and run good, however when I increased to full throttle is boggs down. Yesterday I took it out after cleaning the carb with some Sea Foam, it ran the same. I decide to experiment while I was at the lake. I took the carb cover off and had my buddy drive the boat, when I sprayed Deep Creep Sea Foam into the bottom carb, nothing happened, then the top carb at full throttle it rev up to 5500 rmps with no problem and plained beautifully. Once that was burnt up it starting studdering and bogging down at full throttle.<br /><br />Any Suggestions?
