Yep. What School Said. It isn't any more demanding than any other. IMO it is easier to work on an outboard, my big belly doesn't get in the way.. If you are sure you need to rebuild it take it all down and send the block off to a competent machine shop. They can verify the bore and tell you just what you need. I have an old Merc 2.4L 200 with chrome bore. Some people don't like the chrome bore motors but they are tough as a cut nail and typically do not require anything more than rings to get them back up and running. If the chrome ever does go bad, most just go with a steel sleeve because having the bores re-chromed cost a lot. The 150 is a 2.0L and the 175/200 can be 2.4L or 2.5L in the BM.
When in doubt just remember it will only go back together one way right.
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