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Best way to jack up boat Emptyby Triticum Thu Jun 02, 2016 8:10 pm

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» Parting out Clipper Marine 21/ Free project boat in Michigan
Best way to jack up boat Emptyby Rick26h Sun Jun 21, 2015 8:04 am

» Mast repair
Best way to jack up boat Emptyby Rick26h Sun Jun 21, 2015 7:49 am

» Nice CM-30 for Sale in New York
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» Discovery! Clipper Marine 9.3
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» Keel bolt replacement,
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» New member from Northern California
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tlsallada
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tlsallada

Posts : 112
Sailboat : CM 26
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Age : 67
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PostSubject: Best way to jack up boat   Best way to jack up boat EmptySun Mar 24, 2013 3:59 pm

Today I discovered that the trailer has caused a four inch crack in my hull, well the boats hull actually. It seems the carpet covered 2X4 that is supposed to support the hull has bowed and the only support provided is on the very end where it's bolted to the trailer causing a dimple in the hull and hence, the crack.

Once the weather clears up I'll need to jack the boat up enough to remove and replace this old 2X4 and repair the hull but for the time being, to avoid further damage, I put a 2X4 against the hull in a position up and away from the damage to relieve the pressure. Has anyone jacked their boat up enough to perform the replacement I'll be doing and where is the best place to place jacks??

I used a bottle jack and used the 2X4 to spread the pressure on the hull but could still hear some creaking from the fiberglass.

Thanks in advance for any input !!

terry
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Triticum
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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptySun Mar 24, 2013 7:57 pm

I helped out a couple last summer who had placed a couple of 55 gallon drums under the stern and then placed a stack of heavy boards across. When they jacked up the front of the trailer, the stern rested on the boards. If you then supported jacked up the bow, I could see you getting the ship high enough to remove and replace the boards. Make sure you also support the sides so that a wind gust doesn't knock the boat sideways. The other option may be to launch the ship and work on the trailer while the ship is afloat.
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tlsallada
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tlsallada

Posts : 112
Sailboat : CM 26
Male Birthday : 1952-03-16
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Age : 67
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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptySun Mar 24, 2013 10:33 pm

With the current four inch crack in the hull - floating the boat isn't an option. I like the idea of jacking up the trailer though!!

Thanks. terry
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retired1
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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptyMon Mar 25, 2013 8:13 am

Terry,
I have the 21 footer. To get mine off the bunks I lowered the front of the trailer to the ground which raises the back. Then support the stern with wood cribbing the barrels is a good idea. Then raise the front of the trailer. You may need the help of a jack here under the tongue and then rest the front of the boat on additional support. I placed cribbing right in front of the keel area. It is strong there and reasonably flat. Then lower the trailer to level again, and the boat should be clear. As mentioned earlier support the sides too. Mine was pretty solid and a friend got in the boat to lower the keel so I could work on it.
Hope this helps.
Russ
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Triticum
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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptyMon Mar 25, 2013 6:19 pm

just a 4" crack? Grab the duct tape!
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tlsallada
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tlsallada

Posts : 112
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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptyMon Mar 25, 2013 6:35 pm

Which color duct tape - classic silver or black??

terry
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tlsallada
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tlsallada

Posts : 112
Sailboat : CM 26
Male Birthday : 1952-03-16
Join date : 2013-01-25
Age : 67
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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptyWed Mar 27, 2013 10:44 pm

Not to beat this subject to death but . . . . where on the front of the boat is the strongest area to place support??

terry
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Tiny Dancer
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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptyThu Mar 28, 2013 1:10 am

Personally I would support it just behind where the bow turns to bottom. 21
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Diggs
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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptyThu Mar 28, 2013 9:49 am

The best place to support the bow is in line with the bulkhead. That is the point where there is structural integrity inside to ensure no more cracks.

From the outside of the boat, that is typically about where the mast step is located.
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Triticum
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Triticum

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PostSubject: Re: Best way to jack up boat   Best way to jack up boat EmptyThu Mar 28, 2013 11:32 pm

I saw white duct tape with black mustache shapes...

I agree, in line with the bulkhead is the strongest.
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