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Catalina/Capri 25/250 Sailor's Forums

Catalina 25 Specific Forum

Adjustable backstay install

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jrchase11
1st Mate

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35 Posts

Initially Posted - 12/18/2010 : 10:24:40

I purchased the adjustable backstay kit from CD and have to install an additional tang to put on starboard side of transom. Only thing is there doesn't appear to be a way to access the nuts to fasten the screws for the tang without cutting a hole in the transom. Am I missing something here? what is smallest deck plate/ cover plate they make?

And, yes, I know my boat is very dirty (not sure if pic posting is going to work but I tried).

JohnC
'87 SR/WK #5658
Fleming Island, FL

Edited by - jrchase11 on 12/18/2010 10:33:53

dmpilc
Master Marine Consultant

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USA
4593 Posts

Response Posted - 12/18/2010 : 14:31:10

If Catalina built the 25's like they built the 22's, there will be a metal plate imbedded in the transom in the area where you will need to drill a hole for the tang. Drill a very small pilot hole, using a 1/16 to 1/8" bit. If the plate is there, the bit will likely stop, i.e. you'll experience a lot of resistance. If the kit did not include a tap, you'll need to buy one, because you'll be drilling through the metal plate and will need to thread it to accept the tang. If the plate is not there, you'll need to drill an inspection hole in the inside wall of the transom to provide access to install a washer and bolt on the end of the tang.

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jrchase11
1st Mate

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35 Posts

Response Posted - 12/19/2010 : 10:11:12

thanks for the reply. I'll try that.

Edited by - on

Happy D
Admiral

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921 Posts

Response Posted - 12/19/2010 : 10:32:01

Mine were through bolted and not terribly difficult to get to the nuts on the inside. It was easier on the stbd side than the port side on this '77.
I have in the past Superglued nuts into the wrench so I could reach tight spaces to start the nuts.
I'm a fan of through bolting. A SS nut has a lot more holding power than does a piece of embedded brass. I would through drill the brass and install a full nut with a backing plate if at all possible. The embedded brass is not there as an upgrade to through bolting. It is a cost saving measure by Catalina so it doesn't require a second guy inside the boat to install nuts.
If you need a backing plate, let me know and I'll make it for you. Just tell me what size you need and what the hole spacing and diameters are. I can even tack weld the nuts to the backing plate to make it easier if you need.
It'll be a Christmas present.

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Stinkpotter
Master Marine Consultant

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Djibouti
9076 Posts

Response Posted - 12/19/2010 : 11:04:54

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Happy D
 ...I can even tack weld the nuts to the backing plate to make it easier...<hr height="1" noshade id="quote"></blockquote id="quote">Brilliant! It might also help to make the backer extend downward far enough to make it easier to slide it up into position. The strength of the backer is not that much of an issue--the chainplate will put a sheer force on the bolts--it won't be pulling them outward.

Edited by - Stinkpotter on 12/19/2010 11:10:17

PCP777
Master Marine Consultant

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1225 Posts

Response Posted - 12/19/2010 : 17:07:54

The support on this forum is awesome.

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jrchase11
1st Mate

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35 Posts

Response Posted - 01/03/2011 : 20:00:37

I got it in through a lot of body twisting, cursing, and some help from my children. And no, for the federal record my kids were not present during the cursing. My butt hurts like he||, from sitting in the "afterbirth" all scrunched up (I'm nearly 6-3). BUT, bottomline is it's in and I did not add another hole in my boat (other than the one for the tang).

As a minor confession, I had to donate a small wrench to the boat due to my being short on help (there is a wrench still on the bottom nut that assisted me in tightening the screw outside). Special mod - self holding nut.

<blockquote id="quote">quote:<hr height="1" noshade id="quote">If you need a backing plate, let me know and I'll make it for you. Just tell me what size you need and what the hole spacing and diameters are. I can even tack weld the nuts to the backing plate to make it easier if you need.<hr height="1" noshade id="quote"></blockquote id="quote">
Agreed, I wished I had the patience to fab a backing plate, but then again as Stinkpotter said, the bolts are in nearly pure shear and the fiberglass in block shear so backing plate less critical in this application.

Thanks for the help. Oh and BTW, no metal plate embedded.

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The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.