Well I answered my own question...
Last night I found a great website that answered this question in detail once and for all. I will share the findings so everyone can understand exactly what their unique HID# means. Capt. Brad is right on the money about most of it but there are some other details in the number.
Using the 3 Hull ID#s listed:
SEC F3114 M73J
SEC = SeaCraft - Potter (Manufacturer ID)
F = Fisherman (Model?)
3 = 23 Foot (1st part of serial #)
114 = Serial # (Hull # built that year?)
M = ? (I believe it stands for MONTH or MODEL)
73 = 1973 (Year of Certification)
J = May (Month of Certification)
SIC M0005 M83B
SIC = SeaCraft - CSY (Manufacturer ID)
M = Master Angler (Model?)
0 = 20 Foot (1st part of serial #)
005 = Serial # (Hull # built that year?)
M = ? (I believe it stands for MONTH or MODEL)
83 = 1983 (Year of Certification)
B = Sept. (Month of Certification)
SIC F7115 E686
SIC = SeaCraft - CSY (Manufacturer ID)
F = Fisherman (Model?)
7 = 27 Foot (1st part of serial #)
115 = Serial # (Hull # built?)
E = Mar. (Month of Certification or Manufacture)
6 = 1986 (Year of Certification or Manufacture)
86 = 1986 (Model Year)
From what I learned there are 3 ways to state an HID#. Two alternate ways for boats built prior to 8/1/84 and another way for boats built after that date. Check out this website it will expalin everything.
http://www.boatsafe.com/nauticalknowhow/hin.html
I am curious to see if this works for everyone on this board. Let us know if you find an exception or you have other thoughts.