Re: exhaust bellow
May not be worth doing even if the part "is" cheap.
I replaced a split exhaust bellows on my 165 Mercruiser last fall and it didn't make any difference in noise levels, function etc. If I had to do it over again I would used the exhaust tube instead. They are a lot simpler to replace if you are a do-it-yourselfer like me. Replacing the exhaust bellows is TOUGH!!!!, but doable. One end goes on pretty easy but the other can be a bear. I have big hands and there is little room to work in there.