I enhanced your image of the HIN to better show the actual embossed numbers.

- Fig. 3. The HIN with some exposure compensation.
- HINwithExposureCompensation.jpg (15.03 KiB) Viewed 3517 times
In this picture I see no trace of the MIC for Boston Whaler: BWC
In this picture I only see the four characters 1245 where the five character production code would normally be.
I see the character M indicating the HIN is formatted in the model year format.
Following those characters I see 84H.
Consult the FAQ for help in decoding this HIN.
My tentative interpretation: the boat is an authentic Boston Whaler boat. So we can assume there was a prefixed MIC of BWC. THis mades the HIN read
BWC[Missing character]1245M84H
Now I can interpret this HIN as follows:
BWC (assumed) = MIC for Boston Whaler
1245 = partial production code. The production code requires five characters
M = model year format is in use here
84 = the model year of the hull
H = the month of production, where H means MARCH
Thus from the HIN we know this is a 1984-model-yearboat made by Boston Whaler in March 1984.
Turning to the stencil number of 2C9550, this number is appropriate for a 13-foot hull.
See the FAQ and the 13-foot article in the REFERENCE section.
https://continuouswave.com/whaler/reference/FAQ/#Q2https://continuouswave.com/whaler/refer ... quence.pdfThe above will suggest that a 13-footer HIN would have a letter character followed by four digits as the production sequence number.
https://continuouswave.com/whaler/reference/13/The model-year HIN format was only used until August 1984, so this also fits nicely with the interpretation of the HIN being in the model-year format