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Jacking boat up for bottom work

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T O P I C R E V I E W
crystal_blue	Posted - 10/29/2023 : 08:49:05 Hello - We are about to wrap up Mariah�s first season on Utah Lake and I�m starting to think about giving her a new coat of bottom paint, and associated issues. I found a YouTube video of a gentleman who demonstrates a method for jacking up his C22 from the trailer. (https://youtu.be/MhThLhXTfvE?si=VBvOWAYL3c0wbgxc) It�s intriguing to me, but I wonder how my 250 (WB, if that makes a difference) would do with its greater length and being supported only at the bow and stern. Thoughts?
5 L A T E S T R E P L I E S (Newest First)
Steve Milby	Posted - 11/10/2023 : 10:53:45 quote: Originally posted by crystal_blue I gather that most folks jack the boat up but don't pull the trailer completely out from under the boat, as the YouTuber I noticed above does. Do you find working around the trailer as you paint the bottom to be a significant inconvenience? When I was in my 60s and 70s I could crawl under, but in my 80s I put a paint roller on a telescoping paint extension pole and do most of the painting standing up. I rarely have to do any sanding. I only apply one coat of ablative paint per year, and the only prep that's needed is to wash the bottom. With just one coat, the ablative paint doesn't accumulate and doesn't peel. It just gradually erodes.
doublereefed	Posted - 11/08/2023 : 14:58:07 quote: Originally posted by doublereefed What's the best way to share a photo? I did this two years ago Jim. I'm up here in Midway, sail on DC and Jordanelle. I built two frames out of 6x6, tied them all together. The beams were just in front of the keel slot and just behind. I was worried about cracking or popping the water ballast tank but there were no issues. I had to lift mine to fix the keel pennant, turning ball, etc. I shimmed the keel while I was at it. Can post photos if someone can tell me how to do it. I can't get the instructions from the General Discussion to work. And... should have mentioned... had a crane lift my boat off the trailer onto the rack. Round trip was $500.00.
doublereefed	Posted - 11/08/2023 : 14:56:42 What's the best way to share a photo? I did this two years ago Jim. I'm up here in Midway, sail on DC and Jordanelle. I built two frames out of 6x6, tied them all together. The beams were just in front of the keel slot and just behind. I was worried about cracking or popping the water ballast tank but there were no issues. I had to lift mine to fix the keel pennant, turning ball, etc. I shimmed the keel while I was at it. Can post photos if someone can tell me how to do it. I can't get the instructions from the General Discussion to work.
crystal_blue	Posted - 11/08/2023 : 14:50:48 Steve, thanks so much for your reply and experience. Doing a forum search for similar issues, I gather that most folks jack the boat up but don't pull the trailer completely out from under the boat, as the YouTuber I noticed above does. Do you find working around the trailer as you paint the bottom to be a significant inconvenience? (We hauled out last Saturday and the bottom still looks great, so I may delay that new coat of paint for another year; but am still trying to gather as much info as I can!)
Steve Milby	Posted - 10/29/2023 : 10:50:32 I took a slightly different approach with my C22 that was much more stable and supported the boat better. First, I sanded as much of the bottom as I could while the boat was on the trailer. Then I jacked up the trailer, with the boat on it, and placed concrete blocks under the trailer to support it. Then I built a simple cradle underneath it and lowered the trailer until the boat rested on the cradle. Then I lowered the trailer until the trailer bunks were 8-10" below the boat's hull. That was enough space to get a paint roller between them and paint the bottom. I painted the whole bottom, except where it rested on the cradle. Then I raised the trailer under the boat, disassembled the cradle, and lowered the boat and trailer to the ground. Finally, I painted the areas where the boat rested on the cradle. If you'll look at any boat cradle for a similarly sized sailboat, I generally followed the same design, with angle braces at the four corners. IIRC (because I did this 50 years ago) I used 4X4s for the uprights, 2X8s to brace the uprights and tie them together, and long 2X8s longitudinally, for the bunks on which the hull rested. It took about 3 hours to jack up the trailer and build the cradle under it and only about 45 minutes to take it down. I assembled the cradle mostly with 3/8" bolts, so I could re-assemble it if needed in the future. I did not construct the cradle before jacking up the trailer. I built it in place, because I didn't know how high I needed to build it.

Association Forum

Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
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.