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I've posted this before. Here are the HIN conventions 72-84 and post 84. BKH
Since 1972, the hull id numbers have been standardized across the industry. As I understand it, prior to 1972, it was kind of up to the boat companies. Below is an explanation of the post 72 ids.
For post 72, you will find the Hull ID Number on the right side of the transom, just below the rubrail.
For boats made in the US between 72 and 84:
12 digit code
Example ABC 12345 1272
- First Three Digits are manufacturer code
- Next five digits are serial number
- Last four digits are month and year for date of certification. This is not the model year, but the date the boat was made.
Alternatively another code was used between 72 an 84:
Example: ABC 12345 M73E
Last four digits indicate model year with last digit representing month made as follows
A - August G - February
B - September H - March
C - October I - April
D - November J - May
E - December K - June
F - January L - July
Boats made after 84 use the same code used today:
Example: ABC 12345 A900
First three - manufacturer code
Next five - serial number
Next letter - A through L, corresponding to January through December.
Next digit - Year boat was made
Last two digits - Model year of the boat.
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