Finally got to run the boat with the new muffler installed. Made a huge difference in the noise level and was much more pleasant while trolling and while underway running we could easily talk at normal conversation levels.
Had a little snafu with the original used muffler as when I hooked it up the muffler leaked due to the inlet tubes having multiple cracks hairline cracks. Most likely someone over tightened the exhaust clamps and cracked them. Fortunately, another NOS muffler appeared on Ebay and I bought that one. The new muffler had the original sticker on it with "this side up" marked on it which confirmed that I was correct with my my original guess as top.
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