The only location for the serial number is the tag on the tank. As already mentioned, your tag doesn’t match the tank or vice versa. This is why more photos are necessary. Motors this old often have parts interchanged. 1921-22 have very few differences. The 1923 model A shares most parts, but differs in some key ways from the model F. I’d like to see the carb, timer, transom bracket, transom pads and exhaust cut out. Those are the key parts to identifying what you have and what you need to make the motor correct.
Wayne
Upper Canada Chapter
uccaomci.com
