Join Date: Apr 2006
Thanked 170 Times in 167 Posts
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"I can not find a hin anywhare i don't think all manufacturers were using hin's in 77!! "
IIRC in the US HINs were required beginning in 1972. It would be on the *outside* of the transom, on the starboard side, near the top corner.
Depending on your state laws, if the boat was state registered it may also be titled property, i.e. that ownership cannot be transferred without the title. BY 1977, I think most states were on this program. And the HIN and title information would be on file with the state, usually there's a minimal fee to get the information by filing a request using the registration numbers.