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View Full Version : Swapped boats on trailers via chain hoist



Thorne
07-26-2009, 09:51 PM
I've been wanting to move my dory skiff from the customized and crappy Harbor Freight trailer to the new galvanized trailer that came with my Cosine Wherry. Since the boat weighs over 350 lbs, shifting it back and forth on trailers or the rolling cradle is quite a chore and requires two strong and determined men and quite a bit of cussing.

Had set up a 4x4 post tied with strong nylon webbing and heavy rope to the rafters/joists of the garage, and got a chain hoist in place. Rigged up a spreader bar, got the straps under the dory skiff, and hoisted it up a number of times to the sound of beams, straps and rope creaking and groaning...maybe the groaning was me?

Finally got it more or less balanced, and was able to pull the HF trailer out and roll the EZ Loader trailer underneath. Next to pull the winch stand, raise the winch roller and move the whole thing aft a bit. Realized the boat was too far aft to fit in the garage so had to shift things forward to compensate.

The bunks were the hardest part -- the bunk supports sold at chandelries and trailer shops all seem to assume you'll drill the trailer frame -- but the EZ Loader is a hollow frame and I'd rather not drill it. So off to three hardware stores to get the necessary U-bolts, brackets, and other fiddley bits to attach the bunk supports to the frame.

Then I had to angle the 2x4 support plates -- they build them at 90 degree angles assuming all boats are built like boxes. So into the vice they went and got hammered to about 35 degrees or so. Bolted the whole thing together, which involved cutting the extra-long galvanized carriage bolts to size.

End result is the dory skiff seems quite stable on the new trailer - a bit higher but much more secure. And the oil-bath bearings and commercial trailer equipment make the long trips up to Eureka and Oregon MUCH more worry-free!

Flying dory in the garage -
http://photos-c.ak.fbcdn.net/hphotos-ak-snc1/hs146.snc1/5410_130106858645_519763645_3141850_1726847_n.jpg

Before bunk supports -
http://photos-c.ak.fbcdn.net/photos-ak-sf2p/v5203/79/61/519763645/n519763645_3144922_7308655.jpg

Trailer tilted forward (rolling jack folded up) so wash water drains out of plug near stem. New bunks and bow roller in position.
http://photos-d.ak.fbcdn.net/hphotos-ak-snc1/hs126.snc1/5410_130247868645_519763645_3145011_3531008_n.jpg

Thorne
07-28-2009, 09:20 PM
Took pics of the new bunks on the EZ Loader trailer, which is now all ready to go.
http://photos-e.ak.fbcdn.net/hphotos-ak-snc1/hs126.snc1/5410_131384423645_519763645_3162268_7385144_n.jpg

Cut the rusty bolts off the winch stand on the old Harbor Freight trailer and moved it forward so the Cosine Wherry isn't hangin' off the end of the keel roller.

Before -
http://photos-g.ak.fbcdn.net/photos-ak-sf2p/v5203/79/61/519763645/n519763645_3162270_85845.jpg

Mostly After. The swing-away jack still does, just barely -
http://photos-h.ak.fbcdn.net/hphotos-ak-snc1/hs146.snc1/5410_131385713645_519763645_3162271_3309070_n.jpg

The Bigfella
07-28-2009, 11:25 PM
Yep - well done. I'm planning on setting up a new carport to allow this to be done on a regular basis. I've got one trailer that does two boats, so I want each boat to be able to be winched up into the roof of the carport.... one boat on each side, then, just back the trailer in, lower the boat and away.... with a bit of bunk swapping, etc. The bunks self-locate into tubular supports on my trailer, just need to do up a single lock nut on each one.

Thorne
07-29-2009, 07:50 AM
Actually my 80+ year-old garage is very lightly built (1x8 redwood joists), hence the need to hang that 4x4 across three joists to get the boat lifted safely.

Unless you already have a hoist, the electric cable-hoist ones from Harbor Freight might be the best deal.
http://www.harborfreight.com/cpi/photos/44000-44099/44006.gif

I got a chain hoist, and have to deal with both the pull chain and the 'hoist' or 'lift' chain (don't know the correct term) -- they both hang down into the boat unless pulled to the side or padded with carpet in the boat. I've been told you can hang a metal can or small bucket to take up the lift chain excess...

http://www.harborfreight.com/cpi/photos/00900-00999/00996.gif

Bob Triggs
07-29-2009, 06:45 PM
I would love to see some pix of the trailer and bunk, bottom plank etc setup, without the boat on it, so one can see it all.