Mark 1 HIN location

[Keysdisease]

Mainship had 2 Prefixes for their HIN, one for Toms River NJ (MPT) where your boat was built, and another for St Augustine (MPC)

https://www.marinetitle.com/referenc...&term=mainship

[kchace]

I found the 2nd HIN on a boat by accident on the backside of the bulkhead inside of the anchor locker.

Ken

[ranger58sb]

Originally Posted by Comodave

No the documentation number and the hidden HIN are 2 completely different things and have nothing to do with each other. The hidden HIN is there for stolen boats to help identify them. But the system maybe falls down when the manufacturer goes out of business so they can’t tell LE where to look for it. Unless there is some clearing house for that data, don’t know if there is or not.

Originally Posted by Bacchus

Yes there is a duplicate but I have never found any on three boats. This from WA state...
"Two identical hull identifcation numbers are required to be displayed on each boat hull. The characters of each hull identifcation number must be no less than 1/4 inch high.
Each hull identifcation number must be carved, burned, stamped, embossed, molded, bonded, or otherwise permanently affxed to the boat so that alteration, removal, or replacement would be obvious. If the number is on a separate plate, the plate must be fastened in such a manner that its removal would normally cause some scarring of or damage to the surrounding hull area. A hull identifcation number must not be attached to parts of the boat that are removable.
A. The primary hull identifcation number must be affxed as follows:
•.....
B. The duplicate hull identifcation number must be affxed in an unexposed location on the interior of the boat or beneath a ftting or item of hardware."

Originally Posted by Comodave

Per 33 CFR Part 181

181.29 Hull Identification Number Display
Ø Two identical HINs are required to be displayed on each boat hull
§ The primary HIN must be affixed in accordance with §181.29
§ The duplicate HIN must be affixed in an unexposed location on the interior of the boat or beneath a fitting or item of hardware
§ This duplicate HIN has been required since the 1984 regulatory update to HIN formats, and may be used to replicate the primary HIN in the case that the primary HIN is missing. Contact CG-BSX-23 for more information.

Didn't know all this; thanks, guys.

-Chris

[ranger58sb]

Originally Posted by Keysdisease

Mainship had 2 Prefixes for their HIN, one for Toms River NJ (MPT) where your boat was built, and another for St Augustine (MPC)

Ours (MPC...) was built by Silverton in Marlboro, NJ.

-Chris

[jleonard]

Originally Posted by Keysdisease

Mainship had 2 Prefixes for their HIN, one for Toms River NJ (MPT) where your boat was built, and another for St Augustine (MPC)

https://www.marinetitle.com/referenc...&term=mainship

Well, ALL the HINs that were logged into the file that we had in the Yahoo site were MPC. With the one exception of STN.
They actually started using MPT when they started making the 350 models in 1997. According to the file i have from the yahoo group.
Mainship always did wacky stuff.

Here's a few from the older ones 77 and 78 model years.

Mine was hull 26 and I think it has the longest HIN

MPC00001M77x34T
STN90002M77B34T
MPC00003M77x34T
MPC00011M77x34T
MPC00013M77H34T
MPC00015M77I34T
MPC00016M77I34T
MPC00019M77I34T
MPC00022M77I34T
MPC00024M77J34T
MPC00026M77J7834T
MPC00034M78A34T
MPC00041M78A34T
MPC00046M78A34T
MPC00053M78B34T

[jleonard]

To the original poster or anyone else for that matter, post you HIN and Ii might be able to tell who else owned the boat at some point.

[Gdavid]

Originally Posted by jleonard

To the original poster or anyone else for that matter, post you HIN and Ii might be able to tell who else owned the boat at some point.

Thanks, I would be curious to know anything more about mine. It has surely been around the block a few times but I didn't get any backstory as the seller had already moved out of the area and I only spoke to him very briefly. I don't think he ever did any extensive cruising with the boat but previous owners may have, my hour meter was replaced at some point and I have no idea how much use it actually saw.

MPC00392M80A

[Doodie99]

Originally Posted by jleonard

To the original poster or anyone else for that matter, post you HIN and Ii might be able to tell who else owned the boat at some point.

Well the hin on the boat is MCP00359M79J34T
And no the MCP is no a typo.

[tiltrider1]

I do not know a lot about HIN numbers. My understanding is that the first 3 digits identify both the manufacturer and the facility location of the boat. MCP instead of MPC suggests either a typo on the boat or this boat was build at a different facility. Either is possible. It was not uncommon for a manufacturer to hit capacity in the main yard and farm out one or two boats to a neighboring yard.

[jleonard]

Originally Posted by Gdavid

Thanks, I would be curious to know anything more about mine. It has surely been around the block a few times but I didn't get any backstory as the seller had already moved out of the area and I only spoke to him very briefly. I don't think he ever did any extensive cruising with the boat but previous owners may have, my hour meter was replaced at some point and I have no idea how much use it actually saw.

MPC00392M80A

Sorry, 392 is not in my list. This list was compiled by asking members on the old Yahoo group to submit information. either that owner was not part of that group or didn't submit information.

[jleonard]

Originally Posted by Doodie99

Well the hin on the boat is MCP00359M79J34T
And no the MCP is no a typo.

That number is also NOT on my list. 358 and 360 are but not 359.

It would not surprise me that Mainship stamped the lettering incorrectly.

I did find another in my list that is like that MCP01031M81F40T (a 40 Nantucket with twin Perkins 165s originally)

[ranger58sb]

Originally Posted by jleonard

Well, ALL the HINs that were logged into the file that we had in the Yahoo site were MPC. With the one exception of STN.
They actually started using MPT when they started making the 350 models in 1997. According to the file i have from the yahoo group.
Mainship always did wacky stuff.

Here's a few from the older ones 77 and 78 model years.

Mine was hull 26 and I think it has the longest HIN

MPC00001M77x34T
STN90002M77B34T
MPC00003M77x34T
MPC00011M77x34T
MPC00013M77H34T
MPC00015M77I34T
MPC00016M77I34T
MPC00019M77I34T
MPC00022M77I34T
MPC00024M77J34T
MPC00026M77J7834T
MPC00034M78A34T
MPC00041M78A34T
MPC00046M78A34T
MPC00053M78B34T

Very unlike the format of our '87 Mk III. Ours was MPC34127I687, more similar to the format Silverton (et al, I think) eventually adopted.

Ours was built in Marlboro, NJ. Apparently started on the 13th month (???) of 1986 as a 1987 model.

Presumably hull #127 -- or maybe 27, since the Luhrs people were a bit cagey about stuff like that. OTOH, 127 sounds feasible given your earlier numbers.

-Chris

[jleonard]

There are no 1987 34s in my list.
The last 86 model III in the list has a serial number MPC34122J58634III
So they must have changed in formats for1987.

[Snug Harbor]

The Coast Guard requires Hull ID numbers, I believe this requirement started with the 1973 model year. There is the transom number and another hidden number. It can be anywhere, we've found them under bolted on bow pulpits for example.

For Mainship;
MPC - MAINSHIP CORP 255 DIESEL RD ST AUGUSTINE FL
MPT - MAINSHIP CORPORATION 3O1 RIVERSIDE DRIVE MILLVILLE NJ


HINs By The Numbers;

A typical hull identification number (HIN) consists of 12 letters and numbers, as in ABC12345D404.

Here's what the letters and numbers mean:

ABC: This is the U.S. Coast Guard-assigned manufacturer identification code (MIC). Go to the USCG Manufacturers Indentification page to access the Coast Guard's MIC database.
https://uscgboating.org/content/manu...tification.php

12345: This is the serial number assigned to the hull by the manufacturer. This may be a combination of letters and numbers. The letters "I," "O," and "Q" are excluded because they could be mistaken for numbers.

D: This is the month of certification, indicating the month in which construction began. "A" represents January and "L" represents December. In our example, "D" means April.

4: This is the year of certification. The number is the last digit of the year in which the boat was built. "4" in this case designates 2004.

04: This indicates the boat's model year.

[jcurry]

The MKIII has the "hidden" HIN in the forepeak. The MKI was built before the second HIN was required.

James Curry SAMS AMS

[Jc180]

Originally Posted by jleonard

To the original poster or anyone else for that matter, post you HIN and Ii might be able to tell who else owned the boat at some point.

Jay,
Just bought STN90001M77B34T. Could we be hull #1?
Thanks,
Jeff

[sndbowen]

Originally Posted by Blissboat

If it ever becomes necessary or just helpful to look beneath the engine, or behind a tank, etc. USB "snake" style endoscope / boroscopes have become ridiculously cheap, at Home Depot or online.

I've had my endoscope for about 5 years and used it many times at home and on the boat. Great Tool.

[OldDan1943]

For my American Tug, I stumbled upon my 2nd location.... pulled the fridge out for other reasons and presto, there it was, clear as day.

[jleonard]

Originally Posted by Jc180

Jay,
Just bought STN90001M77B34T. Could we be hull #1?
Thanks,
Jeff

This is what my file says was hull #1
MPC00001M77x34T 1977 Sea Perch Seattle, WA

This was hull#2

STN90002M77B34T 1977 High Flight Kent, WA

But your serial number is more like #2 with STN and B

MY guess is that hulls #1 and #2 were built in the Silverton facility.

The one in my file was the first one built at Mainship's facility.

Just a guess.

So technically yours is probably the real #1

I never saw any of the STN boats, I wonder what's different?

[OldDan1943]

Merely an observation.
Sadly, over the years, so many good boat companies have gone out of business.
With their demise all the original information has disappeared.

Thankfully, with the user groups one stands a very good chance of getting a copy of the "Owner's Manuals" if one is willing to pay to have them duplicated.