Location: Maryland You may want to look at getting a engine-jet unit out of a jet ski. Location: British Columbia, Canada I have heard of people sucking small gravel into the jet intake in shallows too.
I pretty much have my mind made up im going ahead with a monohull welded jon boat design.I have looked at countless sights on the web and Im finding that hard numbers for a 16 ft.
I missed seeing this thread earlier so maybe your boat is done now and my comment will be of no use.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals.
CANADA Thanks for your responses.Im hoping to start drawing the new boat this weekend. I assume that the shape you are using is half of a cone so that both the width and the height gets smaller.

Maybe even a paddle-wheel arrangement (seems like the perfect thing for shallow rivers, eh?). If you look under the inboard utilities & runabouts you'll find designs that could be easily developed in aluminum. Does anyone make a tunnel so that the area stays realatively constant throughout its lenght. And if you want a boat that can also run up on the gravel shingle, particularly look at his Sea Bright Skiff tunnel designs (also protect the propeller really well). It would seem that it would help ram water into the void to fill the tunnel no matter its height (similar to some air inducted hoods).
You might be able to use a slow turning prop with a big surface area partially submerged, akin to a surface drive. One nice thing about Atkin designs - they're tried and tested and the ones on the website are intended for home builders.

When you put a tunnel into a hull, particularly in a small boat you sacrifice valuable buoyancy. All the Sea Bright tunnel drives handle rough water (as much as you'll find in your fishing area) very well. In a small boat like you want, you might just be able to use a regular outboard with a shallow draft johnboat. You could put an extended skeg on the leg to warn you when you're getting into trouble, maybe even rig it so your motor tilts up when the skeg drags on something (reversing would be a bugger though, if the leg is free).

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