? older mercury can't identify hp or modelor exact year

[baluncj]

i just bought an old mercury 6 cylinder outboard that was rebuilt with no info on engine. i started to research the sn# "4401333" and found that it could be a 1974-1976 ,but which one is it. I am also unsure of the hp because the cover says it is a "mercury 800" but when i looked up sn# shown above it seems to be a "mercury 850" . could it be that someone put the wrong cover on by mistake. please any input would help because i can't find a control cable for it with out knowing the year.

[boats.net]

The only thing you can do is to use the serial number to look up parts, it may have cowling switched, or engine or even transom bracket you never know.