Building a KARA Hummer Layout Duck Boat #18: Building a Cart and Modifying a Utility Trailer

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Blog entry by DustyMark posted 08-20-2015 10:18 PM 5790 reads 0 times favorited 3 comments Add to Favorites Watch
« Part 17: Launch Day! Part 18 of Building a KARA Hummer Layout Duck Boat series Part 19: Upholstering the Layout Board »


It’s been great to put the boat to use and discover how versatile it is in MN. It makes a great two-person fishing boat for small lakes.

Here’s Mary with her first catch from the boat…a 20” Northern Pike.

Here’s me with our catch from another trip…a 5 pound and a 3 1/4 pound largemouth bass. We plan to modify the boat by installing adjustable pedestal columns, bass boat seats, and flush bases to mount them. This will require converting to a 3/4” plywood floor. The boat will grow in weight by at least 40 pounds. This made a cart and trailer essential for solo launch and recovery


The cart is made from a 1” by 8” piece of pine and some scrap 1/4” plywood from the boat build.

I used a set of front lawnmower wheels and tires from Northern Tool.

A 3/16” diameter hair pin cotter and washer holds the wheel in place inboard. Notice the holes drilled in the bottom to allow water to drain from inside the cart. One of the trails we cart boats to floods and the trailer may be under water in those locations.

A 3/16” diameter lynch pin and washer holds the wheel in place outboard. The axle is 3/4” solid plated steel.

The bunks are pressure treated 2×4 and covered with marine bunk carpet.

Aluminum angle provides a solid and convenient mounting plate for the bunks.

The bunks mate with the runners on the boat, so only one strap is needed to hold the boat to the cart.

Trailer Modifications

I own an aluminum Triton utility trailer that sits nice and low. It made a good layout boat trailer with some modifications.

I added a rope winch called the Sky Winch from Greenfield Products, some rollers, and bunk carpet to enable solo launch and recovery even on dry land. I reinforced the trailer sides with white oak so that they wouldn’t bend under the forces of the winch.

View of the lower roller and more reinforcement.

I built the cart to align with the trailer height for an easy transfer between cart and trailer.

View of the boat winched all the way forward. I tie the boat down with a strap at the bow and stern near each end of the cockpit. I’m pleased with both the cart and the trailer modifications.


In the next installment, I’ll discuss upholstering the layout board.

-- Mark, Minnesota

3 comments so far

View Marv's profile


21 posts in 1977 days

#1 posted 08-21-2015 12:21 AM

Looks like fun, and pan fried lunch too !!

-- I have never asked someone to do something I haven't or won't do.

View DustyMark's profile


412 posts in 2845 days

#2 posted 08-21-2015 02:00 PM

Pan fried half the bass for one meal and baked the rest another night…tasty both ways. Looking forward to some diver ducks for stir fry!

-- Mark, Minnesota

View Marv's profile


21 posts in 1977 days

#3 posted 08-21-2015 05:05 PM

And don’t forget to save some for the cats!!

-- I have never asked someone to do something I haven't or won't do.

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