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 Hope it don't rain tonight...
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Initially Posted - 04/26/2008 :  20:41:06  Show Profile  Visit delliottg's Homepage

We took the carpet out of the boat this morning to vacuum & scrub it down. It's been drying in the sun since then, but it's not quite dry yet. I'm hoping the weather guessers are right & it's not going to rain this evening. It's clouded over in the past few hours, but none of them look angry.

At least we won't have to worry about water getting in through the compression post any more. Rita & I got the post back in this afternoon. I let the core dry for over a month with a heater running 24/7 inside the boat.

I was wondering what the best process was for getting epoxy to coat the inside of the hole. I toyed with thinning the mixture down with some sort of solvent, but West System recommends against this because it compromises the strength of the bond. I went with their recommendation, and used full strength resin & catalyst, and just mix it when it's relatively warm so it's more runny.

I taped off the bottom of the hole with some Gorilla tape, making sure to run my finger nail around the seal at the edge of the hole so no epoxy could run out. Then I countersunk the four bolt holes a bit to create a gasket hole for the 3M 4200. I'd had the epoxy sitting next to a heat register all night & day, and then sitting in the sun during the morning so it would warm up. I mixed it on top of the cabin so I could work with it immediately since it wasn't going to have much in the way of pot life. I first filled in the holes from the PO's antenna cable install that I've removed, then I used a throw away foam brush to coat the sides of the compression post hole. As the epoxy ran down the sides, I'd gather it back up onto the brush & spread it around the hole some more. Once I was satisfied, I sopped up as much of the extra as I could, then kept pushing the extra that wouldn't come up towards the center of the tape so I wouldn't have too much flash to trim.

This morning after the glue had set for about half a day or so, I went inside the boat & removed the tape. There was a bit of flash around the very bottom of the hole, but this came away quickly with my pocket knife. I wasn't sure I wouldn't have to do some sanding to get the post in, but with a bit of a push & twist, it started in the hole, no problem. I got it as far in as I could, then went inside to install the table. This was more difficult than I thought it would be, but I was finally able to get the bolt that supports the table through the post. Then I pushed it back up enough to get a hammer underneath it to support it while we worked on it topsides.

Rita came out to help, and we ran each of the bolts all the way down & all the way back up to clean out the old caulk. Then we put 4200 around each of the bolt holes, as well as a good bead all the way around the base of the post where it's welded to the tabernacle. We also put a bead all the way around the outside of the tabernacle, about 1/2" in from the edge so we'd get a good seal all the way around. This is what failed last time, so I wanted to be sure of it. Rita stayed on the cabin top with a drill to run the bolts down, and I went into the cabin to guide it down onto the fitting on the deck of the cabin. After I removed the hammer, it came right down, but didn't want to seat on the fitting for some reason. We fiddled with it for a while and finally got it by twisting slightly back & forth while she pushed down from the top.

From there it was just a matter of running each of the bolts down till I could just get a washer, lock washer & nut on each. Then I had her tighten them down till she just got squeeze out and stopped. A little bit of time spent smoothing out the squeeze out so it looks shipshape, and we were done. We'll go back in a few days to tighten them up completely after the 4200 has set.

David
C-250 Mainsheet Editor


Sirius Lepak
1997 C-250 WK TR #271 --Seattle area Port Captain --

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