MARATHON BOAT GROUP INC HIN Decoder
Hull Identification Numbers beginning with GMM were assigned by the US Coast Guard to MARATHON BOAT GROUP INC of MARATHON, NY. The builder is listed in the USCG MIC database. Enter the full 12-character HIN below for build date, model year, and serial — free, no account.
MIC
GMM
Location
MARATHON, NY
In business
since 1996
Status
Listed active in USCG records
MARATHON BOAT GROUP INC hulls (1996–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Free · no account · the HIN is on the transom, upper starboard (right) corner
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MARATHON BOAT GROUP INC HIN FAQ
What does a MARATHON BOAT GROUP INC HIN look like?
It starts with the three characters "GMM" — the Manufacturer Identification Code the US Coast Guard assigned to MARATHON BOAT GROUP INC — followed by a 5-character hull serial and a 4-character date code, 12 characters total. MARATHON BOAT GROUP INC hulls (1996–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is MARATHON BOAT GROUP INC still in business?
USCG records list MARATHON BOAT GROUP INC of MARATHON, NY in the MIC database (registered 1996).
How do I decode the year on a MARATHON BOAT GROUP INC HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. MARATHON BOAT GROUP INC hulls (1996–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits. Enter the full 12-character HIN above and the decoder works it out, including the legacy formats.
Other builders in NY
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "MARATHON BOAT GROUP INC HIN Decoder," carwhere.com/hin-decoder/gmm, last verified 2026-06-12.