19
Dec
A bunk trailer is also known as a float-on trailer. Nevertheless theres a general guide.
If youre happy with the keel of the boat resting on the keel rollers properly adjust the bunk brackets along with the hardware.
How to set up boat trailer bunks. Place the bunks and keel guide. Next up place the bunks on the trailer frame with brackets. You should place them standing on the side refer to the image below and they should support the outer side of the hull.
These will be supporting the boat the most so well use the boat trailer bunk position as a reference for the placement of the boat. To fit a boat to the trailer make rough measurements to allow the boat to sit straight and level on the trailer then crawl under the trailer and position each bunk making sure that the bunks or rollers are positioned next to not under strakes or other protrusions from the bottom that the transom is well supported and that bunks are located under the interior stringers as well as any. If youre happy with the keel of the boat resting on the keel rollers properly adjust the bunk brackets along with the hardware.
With the boat resting on the rollers adjust the trailer bunks but without removing the boat from the trailer. Generally the bunks rest about 13 up from the hulls bottom. However this may also vary from one manufacturer to another.
Start with the boat trailers front part by loosening the adjustable bunk. Install the guide poles at the rear of the trailer and adjust them in until they touch the rub rail. We like to install them a few inches foreward of the rear crossmember on the bottom of the aluminum I-beam with two u-bolts per guide pole.
The view from the rear of your boat and trailer should resemble the above image. Also know how do you put bunks on a boat trailer. Adjust the bunks if your boat is setting on the keel but is tipsy on the trailer.
Use your adjustable wrench to loosen the bolts that hold the bunk supports in place on the trailer. Raise the forward end of the bunk until it touches the bottom of the boat and tighten the forward-most bolt. Step 2 Adjusting Your Boat Trailer Bunks.
Once you are happy that your boats keel is resting on your boat trailers keel rollers it is time to make the adjustments to your boat trailer bunk brackets and hardware. With your boat resting on your keel rollers you should be able to make changes to your boat trailer bunks without removing the boat from your trailer. It is the best approach to set up boat trailer bunks instead of doing the reverse.
Loosen the brackets and reposition the trailer bunks until the hull sits securely on the bunks. You can then fasten the screws using the recommended torque. Once you get the boat on the trailer and set it up for length.
Make sure there is approximately 50mm of the hull overhanging the last roller. Self Centering Keel Rollers can help guide your boat into the center and offer greater support to your trailer setup. Loosen the set screws until the target bunks are on their lowest setting.
As for the main bunks you will not have to move them. The only exception is if they are set at the longitudinal stringer point or stay on a hull transducer or water pickup. If they are in any of these points then you should move them to the middle of the trailer.
Make sure the bunks are also wide enough for lateral stability. Put the Boat on the Trailer. Nevertheless theres a general guide.
The trailer bunks should be resting about 13 from the bottom part of the boats hull. This step requires you to start in the front of the boat trailer. Raise the brackets by loosening them so the bunks will lie on the boats hull.
Set boat on trailer while maintaining no less than 2 gap between keel and tongue plate cover. The end of the bunksrollers should be flush with transom and the boweye should reach the winch post. If this is so the rear pivot should remain in the A-position.
Next adjust your trailer bunks only if your boat is setting on the keel rollers but is a tad wobbly on the boat trailer. You can use your wrench to loosen the bolts that hold the bunks brackets in place on your boat trailer. Start at the most forward point of the bunk raise the bunk until it touches the bottom of your boat and tighten.
Setting up new bunk trailer I like to position the bunks just outside lifting strakes actually touching the outside of them. A lot of boats have stringers molded in at the point of the strakes especially the ones a couple of feet from the keel which is a good place to place a bunk for stability. Connect your new trailer to your vehicle by latching the coupler to the hitch ball and connecting the safety chains and lights.
Back your new trailer in the water in front of your boat so you can float the boat on. Back the trailer down until the forward top of the bunks. A bunk trailer is also known as a float-on trailer.
You should not be pulling a boat UP a bunk trailer it is not good. However not all ramps are created equal and you can find yourself in this situation. A bunk is meant to float on and that is it.
Having the transom sitting beyond the bunks can create pressure points and lead to a hook in the hull. Ideally you want the width between the bunks to match the width between the stringers so the bunks are supporting the boat underneath the boats stringers. Sounds to me like your trailer might not be set up right.
Boat Trailer Roller Bunks like the item you selected part DL21741 are not designed to line-up or center the boat but for the boat to rest and roll on the bunksTypically if you are loading a boat the boat is not loading squarely it is because the trailer is too deep in the water. Instructions for fitting a boat to a new Venture Aluminum Bunk Trailer. Make sure your tow vehicle has the right ball size 2 for singles and small tandems.
2 516 for tandems over 6000 boat load capacity and all triple axle trailers. It may just be the angle of the photo but the bunks look a bit short for the length of the boat in terms of the front end support. You may benefit from guide on posts PVC sections attached to the trailer in the back of it to keep the boats centerline away from the back end of the bunk too.
Adjust the bunks if your boat is setting on the keel but is tipsy on the trailer. Use your adjustable wrench to loosen the bolts that hold the bunk supports in place on the trailer. Raise the forward end of the bunk until it touches the bottom of the boat and tighten the forward-most bolt.