JEM Watercraft

Greetings Builders,

We're working with Morten Oleson to expand our product line with a few small power boats. One of Mortens designs is now offered at

http://www.jemwatercraft.com/proddetail ... =DKDingy15

More info and designs soon to come. Just wanted to get the word out.

I'm looking at this from a fisherman's point of view and I think this is a great design.

We have more and more water reservoirs with motor limitations or no gas motors. Plus we have a all of our relatively small rivers. I imagine this would handle very nicely with a good electric motor.

Two guys could fish out of this very comfortably, and have a little speed when needed.

While I wouldn't want to try to cross a major lake in this , its vertainly versatile enough to fish around the edges, away from !@#%^ PWC's.

The problem with a jon boat is that they are a beast to handle single handed. The front end just presents too much windage, and God forbid you should try to row or paddle one. The narrow stern on this dingy makes paddling "doable". I'm not suggesting a cross country wilderness trip, just when you get around those bream beds, you don't need to be making a lot of noise. Same way going down the river-- you need a little control without cranking the motor every time.

And finally, it looks really good. Nice sheer. doesn't have a boxy "S&G" profile.

Just order another set of plans, but I can see this being the spring project.

What is the max hp for this design. Is it designed to plane? Looks like a nice design.

Thanks NAJ.

Max. engine size is 5 hp, and with an engine this size it will plane. It is not designed to necessarily plane but the option is there.

Is horsepower limitation a function of true power to the prop? engine displacement? weight of engine? My question stems from looking at these two old eska engines in my garage and the only way to tell the 5 hp from the 7 hp is the sticker on the cowling (and the 3 blade prop on the 7 but I am not letting you look down that far). What is the danger of using the 7 rather than the 5 on a craft rated for a 5. Lets assume the operator has some feelings of self preservation and is not a total moron. Thanks in advance for helping me understand a medium that I am not completly famiar with. ie boats and water.

NAJ wrote:Is horsepower limitation a function of true power to the prop? engine displacement? weight of engine? My question stems from looking at these two old eska engines in my garage and the only way to tell the 5 hp from the 7 hp is the sticker on the cowling (and the 3 blade prop on the 7 but I am not letting you look down that far). What is the danger of using the 7 rather than the 5 on a craft rated for a 5. Lets assume the operator has some feelings of self preservation and is not a total moron. Thanks in advance for helping me understand a medium that I am not completly famiar with. ie boats and water.

Weight is a big issue. Larger HP motors tend to weigh more.

Also strength of the hull: Even if weight is ok, think of the force pushing against the transom. Transom and other areas would need to be beefed up. This boat is intended for environments where the water is providing a fair amount hull support. Going bigger means going faster which means more pounding.

Then of course you get into using more gas with a bigger HP.

You could play around with different prop sizes and having self control not to punch it hard. But it's a risk I'd advise against.

Great job Morten! If I didn't all ready have something like this I would be buying lumber and getting plans. I have something about same size only like more of a progue in shape. I use a 3hp Yamaha on it and it will plane with one person at about 9-10 mph. It slows down with two adults fishin gear a electric motor mounted to the bow and battery. But it still moves well. It is a great boat to fish from I like it better than my 16' bass boat with 50 hp motor and it will fish all week on 5 gal. of gas.

Thanks banoe