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I never understood the “merc method” of identifying engines, seems complicated and confusing. Am wondering how you determine what year the engine was produced by using serial number.
I haven’t found a good serial number to year list for all Mercurys since the oldmercs . com website disappeared. It seems that they changed some formats occasionally over the years and that doesn’t help. Sometimes I can get close to the year by looking up parts I don’t need, like carb kits, in my 2004 Sierra paper catalog, where it will list year, or year range for some motors along with a serial number range column, but it’s not complete. At least some of the online parts dealers like Marineengine have serial number input for some year ranges that gets you to a parts list, but to use it, it sometimes gets you to a HP list where you have to click on a few models of that HP to find your serial number – confusing!
Dave