How Do I Know Which Production Number My 83 O'Day 30 CB is?

twodzusfittings

twodzusfittings

.
Aug 11, 2011
980
O'day 30 313 Georgetown MD
So after a month of frantic work on my precious days off from my full time job, I finally splashed my 30 O'Day. Now the rest of the work begins. I took the sail off to take it home in preparation to wash and inspect, I noticed a number. 313. Is this my production number?
 
Ron20324

Ron20324

.
Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
twodzusfittings said:
So after a month of frantic work on my precious days off from my full time job, I finally splashed my 30 O'Day. Now the rest of the work begins. I took the sail off to take it home in preparation to wash and inspect, I noticed a number. 313. Is this my production number?
Click to expand
it might be... WHAT IS THE HULL NUMBER?
 
Davidasailor26

Davidasailor26

.
May 17, 2004
5,679
Beneteau Oceanis 37 Havre de Grace
As Ron suggests, the sail number May or may not be the hull number. The definitive hull number is encoded in the Hull Identification Number, printed on the upper right of the transom. Reading that HIN from the right, the last 2 digits are the model year. The next to characters (letter and number) are the month and year of manufacture. The next 3 digits over are the hull number. For example, XDYnn333A585 would be hull number 333, made in January of 1985, as a 1985 model.

(Edited to correct typo in example HIN)
 
Last edited:
Will Gilmore

Will Gilmore

.
Oct 19, 2017
7,977
O'Day Mariner 19 Littleton, NH
Davidasailor26 said:
For example, XDYnn333A585 would be hull number 555
Click to expand
Is that a typo or am I missing something? #333?
I think, if there was more than one production plant, there may be another letter or number to indicate which plant she was built at. I think, O'Day had a couple of factories around the late 70s and early 80s.

-Will (Dragonfly)
 
Richard19068

Richard19068

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Jun 11, 2004
1,767
Oday 31 Redondo Beach
Will Gilmore said:
Is that a typo or am I missing something? #333?
I think, if there was more than one production plant, there may be another letter or number to indicate which plant she was built at. I think, O'Day had a couple of factories around the late 70s and early 80s.

-Will (Dragonfly)
Click to expand
I think he means 333 in the example, particularly since O'Day 30 hull numbers only went through about 350 or so before they were modified to the O'Day 31 in 1984/1985. The 313 is probably the hull number of the OP's 1983 model but checking on the transom as Davidsailor26 suggests will confirm that.

 
Davidasailor26

Davidasailor26

.
May 17, 2004
5,679
Beneteau Oceanis 37 Havre de Grace
Will Gilmore said:
Is that a typo or am I missing something? #333?
I think, if there was more than one production plant, there may be another letter or number to indicate which plant she was built at. I think, O'Day had a couple of factories around the late 70s and early 80s.

-Will (Dragonfly)
Click to expand
Yeah, sorry, typo in my example. The hull number would be 333 based on the fictional HIN I wrote. I don't think O'Day distinguished between production locations in their HIN's although I can't find the decoder that I was able to find in the past.
 
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