Trailer length

Len Nowak

Member
Does the bunk, the rear carpeted rails, need to go to the transom of the boat? The boat is 16' aluminum, with a 25 hp motor. It's now 23 inches short.
If so, should I extend the bunks or the trailer?
 
Does the bunk, the rear carpeted rails, need to go to the transom of the boat? The boat is 16' aluminum, with a 25 hp motor. It's now 23 inches short.
If so, should I extend the bunks or the trailer?


Trailers are over the place and you can find that probably most violate what I will say, but... The ideal setup would include the rear of the bunk extending beyone the transom by a bit (an inch) AND the bunk bracketss being fairly close to the transom to support the weight.

Since the bunk is now 23" from the transom, the bunk brackets are farther than that. Closer to the transom would be better. Is there any support at the very rear of the boat? Keel roller, maybe? I don't know if extending the bunk would get you a whole lot, since the support is so far away.

Trailers are very adjustable, a picture woudl help a whole lot in thinking about moving things around.

Finally, as I said. There are lots of trailers set up in similar ways and the boats on them are "fine" or appear "fine". I would think about what you can do to move things around.

T
 
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Does the bunk, the rear carpeted rails, need to go to the transom of the boat?

Yes, Just as Tod said, the support should be directly under the transom. That is where the load is. That is where the boat is the strongest. Therefore that is where the support should be.
 
Should I extend the trailer?
DSC00820.jpg

This is how far from the nose the trailer sits
DSC00821.jpg

 
I can't tell for sure, but it looks like the bunks are right on the frame (i.e, no bunk support brackets, like I was talking about).

Were it me I'd look at removing the winch stand and rewelding forward of where it is (you may not have enough room to get everything you need or that may cause clearance issues with the tow vehicle). You could also extend the bunks a few inches to catch the transom after you move the winch stand. Can't really say for sure how far, but a foot would probably not offer enough support to the transom to be ideal, but 6" probably would if the bunks are 2x4s or larger.

2' is a lot of boat to have hanging, I'd do something.
 
Len,

A lot depends more so on axel placement. You can do as Tod said and gain some by moving the winch. However that also increases tongue weight. Leaving the boat in the same position it now is, and extending the trailer rearward, will ligthen the tongue weight slightly due to the increased weight (adding frame material) behind the axle.

It is real hard to engineer a trailer rebuild from photos alone. One has to take into account all the variables when redesigning a project such as this. Glad to offer advice but be warned you ultimatly must do the engineering to make it happen.
 
Len,

A lot depends more so on axel placement. You can do as Tod said and gain some by moving the winch. However that also increases tongue weight. Leaving the boat in the same position it now is, and extending the trailer rearward, will ligthen the tongue weight slightly due to the increased weight (adding frame material) behind the axle.

It is real hard to engineer a trailer rebuild from photos alone. One has to take into account all the variables when redesigning a project such as this. Glad to offer advice but be warned you ultimatly must do the engineering to make it happen.


Of course keeping in mind that that a tongue heavy boat is better than a boat under a tongue weight of 7-8-9-10% as far a safety of towing.
 
The bottom line is your trailer is way too small for the boat. That trailer most likely isn't rated for a boat that heavy. The transom should be close to the rear of the trailer frame. Get another trailer that will safely transport your boat. Good luck.

Tom.
 
If the transom is left hanging and there is a motor on it, it will eventually crack the transom. You need to support it.

Ed.
 
It looks like some tried to extend it already you can see the splice plates in front of the winching post ' looks kind of bowed . A lot of cutting and welding to get it right think it's for a trailer that fits.
 
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