My 20 front beam has the same deal as the rear beam. Would appear to be an extruded part of the beam.

Of course you realize you have to take the other side apart to check it......right?

Thought maybe you got the wife to grab you a colonascope from work or something

No but she did bring the ultrasound home one night to check to see where our puppy's undescended testicle was :P

haha! (don't even wanna know what the results were)

That is hands-down, the mother of all thread tangents. Wow...

Mike

Hmmmmm. I really thought that was an extra piece but you certainly could be right. Either way, if it looks like the rear beam reinforcement, it will be a lot easier to work around than the infusion-style pieces.

Puppy? mmh.

Right up there with this one.

It is like the Prindle, the strip and 2 bolts are one piece, If you can remove the other nut and see if you can force the piece up into the beam, remove and replace. If I recall the bolts were welded to the strip.

That's the "UN-friend" one, right?

So I can't just replace a bolt? Its a strip that goes in there that I have to order from Nacra?

No, that stuff is to be expected (and easily ignored if you're not directly involved). Some poor dog getting "special" attention is definitely new here.

Mike

I would bet that it's two loose stainless steel bolts that go through a 1/4" or 3/16" aluminum backing plate inside the beam. I would expect to see enough corrosion on that plate to justify replacing it but you might get lucky and be able to reuse it.

You can get pre-anodized aluminum bar stock from McMaster. You will have the exposed cut end and the holes you drilled where the anodizing will not exist - but I would spray paint the exposed areas and use plenty of 42 or 5200 on reassembly. You should be able to get plenty of what you need for under $20.
McMaster anodized aluminum

McMaster never links easily. From that link, choose Multipurpose 6061 alloy. On the left menu from there, click "anodized". Pick the size you need from there.

Thanks Jake. I'll take a look inside the damn thing and see whats up.

I built a new beam awhile back and ordered all the new parts needed. The part was called a "bolt plate" which was made up of SS bar with the SS bolts welded to it. Like Hullflyer said.

What a clusterfu....

So you have to take the beam bolts out, then get the box insert out of there (BFH works the best here) and here's what you get as your consolation prize:





The beam box insert seems to have taken the brunt of the galvanic corrosion.

FWIW, those bolts aren't stainless as they really, REALLY liked my magnet lamp.

I can't imagine why those are magnetic. They should be 316SS. We know Nacra of old (or any manufacturer really) and they wouldn't have put in some exotic expensive hardware where a bigger bolt would do.

Really? Maybe previous owners? Undecided (the boat) does indeed have a colorful history.

A little on stainless.

http://www.scientificamerican.com/article.cfm?id=why-dont-magnets-work-on