Re: what is the year of my 9.9 Johnson Seahorse
OMCs 1980 & up are real easy to determine the model year.
Using the second and third last letters in the model number, see where they correspond with the word "INTRODUCES".
1 2 3 4 5 6 7 8 9 0
I N T R O D U C E S
So in your case the letters are "CN", which matches up with "8" and "2".
LC.