If you look at the plate on the motor the top number is the serial number, and the 4-digit number right below that is year of manufacture.
It is on the rectangular tag on the right side of the motor, on the transom mount
After the 2005 model year
The HIN- Hull Identification Number is located at the rear of the transom in the upper right corner.
"Agriculture is our wisest pursuit, because it will in the end contribute most to real wealth, good morals and happiness." – Thomas Jefferson