The last two digits of the HIN, in your case "84", are the Model Year of the boat. This may or may not be the year it was built. You have to look at the two digits that precede the model year to determine the month/year of build. The fourth-to-last- digit will be a letter, A-L, which corresponds to the month (e.g. A=January, B=February, etc). The third-to-last digit is the build year, represented by a single number. For example, this digit on your boat's HIN is probably either a 3 or a 4, and by the model year we know the build year to be either 1983 or 1984. So, let's say the last four digits of your HIN are "G384", then your boat is a model year 1984 built in July 1983.
Does that make sense?
EDIT: I forgot your boat falls right in the transition year so True Blue's caveat applies.
Last edited by JohnRPollard; 10-23-2007 at 12:39 PM.