"Got an old merc 7.5 with a ne
"Got an old merc 7.5 with a new boat purchased. I attached the fuel line and primed the carb and the engine started ok but after about 20 seconds it cuts out. I opened the case and tried it again and noticed air coming back up from the carb into the fuel line. The engine was serviced before I got it so i would have though it would run 100%, anyone any suggestions?"
"Got an old merc 7.5 with a new boat purchased. I attached the fuel line and primed the carb and the engine started ok but after about 20 seconds it cuts out. I opened the case and tried it again and noticed air coming back up from the carb into the fuel line. The engine was serviced before I got it so i would have though it would run 100%, anyone any suggestions?"