Adjust bunk with boat on trailer

[MolsonCanadian]

Little background,

When I got the boat, the trailer was (still is) a POS, but it works. Last Aug when I received the package I wasn't happy, and complained about it. (Originally we were to get a EZ Loader roller trailer, but ended up with a bunk trailer that I'm sure hauled the patrol boats in Vietnam)

Anywho, while the boat was in the water, we sent the trailer back to set it up properly.

They did put new bunks, rollers and winch stand on it, so I'm happy(ish).

When we hauled the boat in the fall, the bunk is a little too much outboard and ends up pushing on the fender, which in turn rubs the tires.

What I need to do is lift the boat off the bunk so I can adjust them an inch or so inside to alleviate this.

How would you suggest I get the boat off the bunks?

 

[rednecktech00]

Re: Adjust bunk with boat on trailer

Not sure you need to remove the boat just to push a bunk up. I raise mine by putting a hydralic jack under bracket or mounting post. Loosen the bolts, and push up until the boat is sitting how you want it. If you have multiple lifts under the bunk, brace them with jack stands, loosen the bolts, and the others will move up with the one you are lifting.

 

[MolsonCanadian]

Re: Adjust bunk with boat on trailer

The trouble is, the bunk needs to be moved IN, laterally. Up is easy, over, not so much.

 

[Jeep Man]

Re: Adjust bunk with boat on trailer

Set your boat about a foot farther back than normal, with the back hanging over. Drop the tongue all the way to the ground. Block up the back (both sides). Crank the tongue all the way up and block up under the keel at the front. Drop the tongue, make your adjustments, and reverse the procedure.

 

[Bondo]

Re: Adjust bunk with boat on trailer

The trouble is, the bunk needs to be moved IN, laterally. Up is easy, over, not so much.

Ayuh,... With the trailer hooked to yer truck,...
Jack the hull up, 'n off the offending bunk, reposition it, then let it back down...

 

[superbenk]

Re: Adjust bunk with boat on trailer

I throw the floor jack up on the tongue under the keel at the bow & jack it up a few inches off the roller. I put some 2x4 blocks under the keel & drop it back on the blocks. Then I move back to each corner at the transom and (carefully) jack them up with a 4x4 set vertically on the floor jack up to the chine. Block the boat against the trailer frame off the bunks & repeat on the other side. You have to be very careful because the boat will want to twist sideways when you lift up one side of the transom higher than the other. Just go slow & watch the angle of the blocks, etc.

 

[MolsonCanadian]

Re: Adjust bunk with boat on trailer

Good call, I didn't even think about blocking it on the trailer frame itself. Thanks.