bunk type

[smaples]

I bought this boat used and replaced the bunks shortly after I got the boat. I basically have the bunks in the same location as the old bunks however I did lengthen them to reach all the way to the transom. As you can see from the pictures, the bucks are laying with the 6" side against the hull. I have seen a lot of boats with a 4x6 with the 4" part against the hull, which would give more support to the transom then the setup I have. I have read about the hull bending when it is supported like mine is and it does look like I have a bend in my hull. So I am thinking about changing to a 4x6 and letting it extend a few inches past the transom. The boat is a action craft 1720 with a 115 4stroke mercury. My questions are, should I be concerned with how the bunks are now? If I change to the 4x6 where should they be placed with reference to the hull? As you can see the transom is hanging over about 15" from the bunk support.

 

[Home Cookin']

Re: bunk type

I think you're close enough to the end of the bunks. Maybe slide your winch post forward a couple of inches if it worries you and that doesn't upset your balance. But I wouldn't change them unless you were going to replace them anyway. teh weight is distributed along the whole bunk; a roller would be different. just my uninformed opinion fwiw.

 

[canman]

Re: bunk type

I bought this boat used and replaced the bunks shortly after I got the boat. I basically have the bunks in the same location as the old bunks however I did lengthen them to reach all the way to the transom. As you can see from the pictures, the bucks are laying with the 6" side against the hull. I have seen a lot of boats with a 4x6 with the 4" part against the hull, which would give more support to the transom then the setup I have. I have read about the hull bending when it is supported like mine is and it does look like I have a bend in my hull. So I am thinking about changing to a 4x6 and letting it extend a few inches past the transom. The boat is a action craft 1720 with a 115 4stroke mercury. My questions are, should I be concerned with how the bunks are now? If I change to the 4x6 where should they be placed with reference to the hull? As you can see the transom is hanging over about 15" from the bunk support.

hello , i think you should move those bunks ahead about a foot and move your winch ahead . it looks like your bunks are out to far , i just put new bunks on my trailor , they are2x12x12 feet long and they only go about 4 inches pass the end of the trailor . the boat is 22 feet long and weighs 4000 pounds . just my 2 cents ..

 

[fat fanny]

Re: bunk type

I personnaly would not extend those bunks any further aft than they are due to the possibility of them craking and or breaking upon loading from hanging out too far and not being supported by a bracket. As far as moving the boat forward on the trailer you will have to test the waters so to say if you move it too far forward you could experience a swaying affect when towing so road tests may be in order to get your load centered on the trailer correct. I do know on my EZ-loader my bunks(8' long) are set up flush with the transom and are @ the very end of the trailer frame in the rear with 3 support brackets it's a single axle trailer stock set up and balanced very well. Hope this helps and good luck!

 

[LippCJ7]

Re: bunk type

I would really like to see pictures of the whole setup, front and rear, Front to see if you can move the boat forward on the trailer without upsetting balance. I don't like the amount of bunk aft the trailer, any bunk in that setup will weaken over time if pressure is applied to areas that are unsupported. The hull of your boat should distribute the weight of the boat evenly however, as others have stated in other posts you need to have good support at the transom to eliminate the possibility of the hull cupping at the transom, just having the bunk contact the hull at the transom does not necessarily accomplish this since the bunk needs to be supported properly at the transom as well, this you do not have. One idea I have seen is to turn the bunks 90 degrees, turning the strongest part of the 2x4/2x6 to carry the load rather then width wise. Personally I'm not a fan of this but it would solve the problem at least temporarily.