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Catalina/Capri 25/250 Sailor's Forums

Catalina 25 Specific Forum

tang on aft end of boom

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jerlim
Master Marine Consultant

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USA
1484 Posts

Initially Posted - 06/22/2006 : 13:18:58

The tang is held in place to the cast boom end fitting by a large sloted-head machine screw. The screw is loose (1/8" play) and will not tighten, really too much play. The cast piece is held in place w/ two opposed #8 or #10 philips machine screws - which are completely frozen. Has anyone experience w/ this? Is the large bolt held in place w/ a lock nut?

I expect I'll strip the philips screws removing them, than have to deal w/ drilling them out, not to mention tapping the cast piece etc....Any advice?

Many thanks!!

Jerry

Edited by - on

Heartbeat
Navigator

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USA
161 Posts

Response Posted - 06/22/2006 : 13:50:34

As I recall, the tang in that cast fitting on the end is held in place by a nylock nut.

I was able to get mine apart by using penetrating oil (PB Blaster) on the phillips head screws. Of course, I let it soak in for a couple of weeks over the winter.

It's aluminum, so heat might also help.

Good luck.

-Matt Q.

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PZell
Admiral

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USA
548 Posts

Response Posted - 06/22/2006 : 14:38:17

Getting the end cap off is a problem. You will invariably strip the screws. A few of us have replaced the endcaps and what we did to get them off is this: cut off the screw head with a hacksaw or chizel. Then punch the stem of the screw into the boom with a nail punch. When you replace the cap, you may have to use slightly larger screws. The method works and saves a lot of frustration.

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jerlim
Master Marine Consultant

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USA
1484 Posts

Response Posted - 06/22/2006 : 14:47:47

Thanks for the advice, I see how I'm spending tomorrow morning!

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PZell
Admiral

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USA
548 Posts

Response Posted - 06/22/2006 : 14:50:39

By the way, CD sells a new end cap with a beefier tang. The tang is supposed to be loose so that it will adjust to the varying angle of pull from the mainsheet tackle. But, the way you discribe it, it sounds like something may be worn.

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 06/22/2006 : 16:58:39

The tang is supposed to be very loose, If it is not changing I would not mess with it.

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 06/22/2006 : 17:55:59

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by jerlim
 The tang is held in place to the cast boom end fitting by a large sloted-head machine screw. The screw is loose (1/8" play) and will not tighten, really too much play.<hr height="1" noshade id="quote"></blockquote id="quote">

I have about a 1/8" gap between the boom cap and screw head which allows the tang to move freely.

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ClamBeach
Master Marine Consultant

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3072 Posts

Response Posted - 06/22/2006 : 20:16:21

I had the opposite problem, the tang wouldn't swing freely... which twists the boom when sheeted out.

As Sparky described in a post above, I ground the heads off the screws, punched 'em out and replaced with a larger size when putting the cap back on. (After renewing the tang bolt).

Be sure to use never-seize or similar compound on the surfaces where the endcap fits into the boom... and on the threads of the sheet metal screws. Next time it will come apart more easily.

Edited by - on

djn
Master Marine Consultant

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USA
1561 Posts

Response Posted - 06/22/2006 : 20:30:19

My tang is snoosed down tight. I never thought about it. Looks like I will be working on the boom next week. Cheers.

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tinob
Master Marine Consultant

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USA
1883 Posts

Response Posted - 06/23/2006 : 07:54:17

My boat, an '83, came that way...is still that way...will stay that way...Probably a call to Catalina will help you over the problem thar you are having.

Might save you alot of unnecessary work.

Val on Calista #3936, Patchogue, N.Y.

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ClamBeach
Master Marine Consultant

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3072 Posts

Response Posted - 06/23/2006 : 09:18:25

Tinob, are you saying that your tang is loose and you're not worring about it, or that it's tight and you're not worrying about it?

If it's tight, next time you're sheeted out on a 'brisk' day, take a look at the stress boom twist is putting on the gooseneck pin.

Mine hadn't broken yet either, but I could see the clock was ticking unless I fixed the issue. Like anything else on a boat, it is most likely to fail at the most critical time.

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 06/23/2006 : 17:07:00

tight bad, ...really.

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tinob
Master Marine Consultant

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USA
1883 Posts

Response Posted - 06/24/2006 : 07:54:32

Clam,
The original post spoke of a bolt being too loose, my response was of an also loose bolt. I had tried to tighten/loosen it when I first showed concern for it. Since it seemed happy as is I assumed it was designed that way and let it be. May have tried to adjust it from time to time to no avail, and so it stays that way.

I assume it is as designed. However I'm concerned with the effect observed by those who removed the end cap and tightened the bolt. What did they observe the screws mounting to be? What effect did tightening the bolt have on the the boom's deployment?

Val on Calista # 3936, Patchogue, N.Y.

Edited by - on

oldsalt
Admiral

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USA
578 Posts

Response Posted - 06/24/2006 : 08:41:59

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by tinob
 My boat, an '83, came that way...is still that way...will stay that way...Probably a call to Catalina will help you over the problem thar you are having.

Might save you alot of unnecessary work.

Val on Calista #3936, Patchogue, N.Y.
<hr height="1" noshade id="quote"></blockquote id="quote">

Yep, the tang on my '83 came that way from the factory too; and it's still exactly the same.

That's the same problem you're not having.....go sailing instead of drilling.

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ClamBeach
Master Marine Consultant

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3072 Posts

Response Posted - 06/24/2006 : 09:39:25

Wouldn't worry about the looseness... remember the tang also has to point a bit aft to line up with the mainsheet controls. (not a perpendicular relationship).

What is a good idea is to pull it apart to inspect the general condition of the bits inside... make sure the bolt/nut holding the tang is ok and the nut isn't backing off. Shouldn't miss a lot of sailing with this project, should only take an hour.

Side comment... sailboats (like ours) are blindingly simple. There are only a half dozen moving parts... and perhaps another dozen static parts that are 'players' in the sailing process.

Even though the boat is a simple machine, the short list of 'bits' needed for saing must be 100% right for safety.

Just for fun list.

Critical Bits:

Stays (Back/Fore/Side)
Chainplates
Turnbuckles
Cable/Swages
Mast Hardware
Spreaders
Sockets
Tips
Mast (Base/Extrusion/Fittings)
Boom Gooseneck/Tang
Halyards/Sheets
Line
Blocks & Sheaves
Shackles
Rudder Gudgeons/Pintles
Tiller
Hardware
Tiller handle

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StSimon
Captain

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USA
298 Posts

Response Posted - 06/24/2006 : 09:44:05

I used to love Tang when I was a kid.

Can you still get the stuff?

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tinob
Master Marine Consultant

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USA
1883 Posts

Response Posted - 06/25/2006 : 10:43:57

WISPER,

Should you decide to go ahead with removing the end cap I have a technique that I use when addressing stubborn screws ( usually those encountered that are imbedded in a dissimilar metal) such as is the case we encounter on our mast/boom. Of course first try to back it out after lubeing it with what usually works for you, should this not work, try tightening it a miniscule amount, then again try to back it out. This usually is all that I need do. BUT occasionally I have to resort to my "BADDA BING"

screwdriver that you hit with a hammer. Doing this exerts a twisting motion on the screw head. It's a cumbersome device but works well on really stubborn screws. I removed all the screws on my boom in short order and when reassembling used a copper compound paste that was advertised as "anti-seize"

Thought you might like to know what works for me.

Val on Calista # 3936, Patchogue, N.Y.

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