I am replacing the exhaust hose on my MDL3. The hose exits the generator and goes into a 90 degree elbow. It then continues to the side of the muffler intake or IN. The intake of the muffler is 2 1/2" OD. The top of the muffler or OUT exits to the thru-hull and both ends are 2 3/8" OD. With some elbow grease I was able to fit a 2 3/8" ID hose on the 2 1/2" OD fittings. My idea was to use the same size for the entire run. It also made sense to me that if I ever had a hose clamp break the hose would still hold because it was a tight fit. Anyone out there that has any objections to doing this? I did notice that the new Vernalift mufflers now come with the same ID on the IN/OUT ports.