steaming pipes

Every gallon of gas you burn you get a half gallon of water through the exhaust. Sometimes if you have a to big of an exhaust pipe and a small motor the exhaust doesn't heat up enough to burn off the water vapor. I had the same problem on my 273 with a 340 dual system. It spit water at idle, especially when the outside air was cool and damp .Not so bad in the summer.
My fix was to drill a 1\8 inch hole in the back of the muffler. Bob