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More on Replacing and Repairing Centerboards (updated October 26, 2012)

June 3, 2010. On this page we will try and accumulate stories of centerboard replacement and repairs. These have been excerpted from the Roster pages of the various boats. Click on the boats to go to those Roster pages. For more information on this general subject go to the Technical Section and scroll down to Centerboards.

Dave Gobiel's Sophia, Yankee, # ?

Hi Ron,

I just happened to tune into your site this morning and saw the new update regarding Wada's centerboard replacement.

Exactly what I just went through!

I"ve been very busy with work the last few months so I've only been able to spend an hour here, and hour there, working on it.  But as you could tell from my previous emails regarding my desire to re-locate the pin down the keel, I had a gut feeling this was the proper thing to do. (and it is, according to S and S!)

So, being a glutton for punishment I undertook the job myself and can attest.... it was an absolute b*tch drilling through all that lead.  I had the added excitement of breaking an extended bit while it was almost fully buried....lots of fun!!!

How did I overcame the broken bit? I no alternative but to estimate the exit on the opposite side of the keel and drill in from the opposite side so I could hammer it out. I was off by about half inch, so, as you will see from the pictures below, I ended up making quite a mess lining up the new hole with the original hole. This added several hours (and much swearing) to the job.

The other "problem" I encountered was the new board which I had cut from 3/8" steel plate according to the measurements I took from somewhere on the site didn't fit properly.  I made an exact plywood copy of the steel board to fit and properly locate where to drill the pin hole and also make sure it would raise and drop correctly..

I ended up having to cut off a fairly large chunk off the front bottom corner of the board to allow it to drop to the specified amount, this was probably due to the new pin hole in the keel not being in exactly the right spot since i just eyeballed it.

Then I had to trim 1.5 inches off the length of the board so that it would fit all the way up into the trunk (i had nighmareish visions of grounding and the top of the trunk absorbing the entire weight of the boat from the centerboard protruding out the bottom of the keel.....)

Yesterday we dry fitted the board one last time before painting it and we will mount it today! Here it is!!

Warm Regards,
David Gobeil


Carl Hazelton's Yankee #248.

The centerboard pin in #248 was in the centerboard trunk, buried under a ball of some sort of filler - just like in a couple of the web pixs. A wood chisel works best to chip away the material. A 20 min job once you get your courage out to start digging. Bolt came out quite easily!! Wow. Webmaster Note: Check out http://dolphin24.org/227_CB_trunk_repair.html

Cabin sole panel
The centerboard pin hole

Part of the old centerboard was still there. Also there was some wear thru of the glass around the centerboard trunk. (Webmaster Note: There's some great info on this subject at http://dolphin24.org/227_CB_repair_project.html

The pixs in the Technical Section on the web sight were great for both projects. Thanks.


October 26, 2012. So, what did Carl do about his centerboard? (emails consolidated)

Hi Ron

I found a 4x4 piece of 3/8 stainless. Had it cut to size. Primed and painted it. Bronze bushing for pin to ride on. Hope to install soon!!

Should have enough ss plate to cut out another if anyone is in need of a centerboard.


Webmaster note: See Forum post re http://www.dolphin24.org/forum/forum_posts.asp?TID=214


Rowland Thompson's Thistle, Yankee #99

"My centerboard hit an old oyster pen (long story, big concrete) in Totten Inlet years ago and I went up to the Boeing surplus and bought a sheet of Kevlar armor (it stopped a 30-06 in an backyard test). It took three of us to carry a three by eight sheet, and it dulled two saw blades, but I have a bulletproof centerboard."

Rowland Thompson


Scot Ioset's Prodigal, Yankee #204

"It did give me the opportunity to inspect the centerboard and centerboard  well when it came off the cradle. As you can see, the CB is broken forward of the lifting tang and is nothing but a free-swinging stub of delaminated wood and fiberglass"



Jack Hubbard's Hornet, a Tripp built Dolphin

Hornet had a 'killer', foil shaped, forward inclined centerboard that acted like a jibing board. The original board that came with Hornet was a fiberglass wrapped steel plate that, as per the original S&S design, did not fully drop to the vertical position. The board began to delaminate which provided the stimulus for the new go fast board


Hal White's Imp, a Tripp built Dolphin

This boat is now Jay Picotte's Recovery. Jay found this old picture of IMP in his files. We have little information about her. She was a successful racer and was referenced in an November 8, 1968 internal S&S memo about improving performance in a Dolphin. IMP had a custom made, cast bronze, foil shaped centerboard, and a lighter mast. Click here to go to this memo. Scroll down the memo to get to the centerboard paragraph.


Mike Horn's Avellar 2 (Angel), Yankee #73

"Regarding the centerboard, it would not descend.  After working a slender bar up the trunk aft, I was able to pry it down.  Then, first with wood and later with a strip of old bronze, I knocked back and forth in the trunk and lots of debris fell out.  Most interesting were thin sheets that looked a little like styrofoam with traces of worms that I think provided most of the resistance to smooth operation of the board"














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