Formula 233 Registry

The premier site for owners of the famous 233.

Designed for owners and fans of the one of the world's original offshore powerboats, Don Aronow's famous 233.



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Latest Activity

Mark Aderholdt updated their profile
Jun 16
James Comeau posted a discussion

HIN Decoding Help

Can anyone help me decode my HIN? Thank youF2312169See More
May 8
James Comeau commented on Robert OHerlihy's photo

Tryst Sept 2021

"Bob, can you explain where the name TRYST comes from?"
Apr 3
James Comeau posted a discussion

Can I swap the hull cap

I have a 1969 that needs a lot of work to the hull. I’ve come across a 1970 that has a nice hull but the hull cap is junk. The hull caps appear to be similar in size and design but the helm is different. My question is: Can I just swap the hull caps and how difficult is that to do?See More
Feb 28

Devoted to the famous 233

This registry is dedicated to preserving the heritage of Don Aronow's famous Formula 233. A place to network with other 233 owners, discuss technical issues, get and give advice, exchange knowledge and compile a database of the remaining 233's. If you've ended up here you've got some connection to a 233. Special thanks to HORBA for providing images. Please visit the Historic Offshore Race Boat Association , an organization dedicated to educating the public about the history of offshore racing. Welcome and thanks for visiting.


HIN Decoding Help

Started by James Comeau in General Discussion May 8.

Can I swap the hull cap

Started by James Comeau in General Discussion Feb 28.

WTB 233 LS Hull 1 Reply

Started by Steve Rush in General Discussion. Last reply by Jim VanDerpoel Jul 24, 2023.


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