Doing a search on mini mudmotors.....

Clamp on Direct Drive Portable Mixers dod web search very promising only thing is it does not have a sealed shaft that can be welded too for a skeg and a brace but could be doable with just some sort of clamshell pillow block bearing or somthing i think cost would be way out of line but a used salvage setup might be doable im gonna go too a salvage yard i know of and see they had lots of big mixing vats the auger moter powersounds promising too hate being sick but im getting screen googling time lol
 
We are getting there. What do you know about adding gear reduction to a small 30 - 49 cc 2 stroke or a motor similar to the hnda GX35 motor Tom. I know you are thinking about this. As promised, I'll bring the beer if you'll provide the expertise.

I do like the quality of the Rickshaw motor. You can tell that John has put quite a bit of time and money into this project as it is first class stuff. I hope he does well with it. I figure that by the time you buy the motor ($220) find a gear reduction mechanism ($130 or so) and add the propr ($25) and fabricate the rest ($50 - 100) you could have $4-500 into the thing. I know you can do better Tom.

Mark W
 
Mini-mud motors.
In responce to Ray in alaska - here at Utah Marsh Motors, Yes, we have been working on getting a mini motor together for almost a year now. Murphy's law has interfered several times. Each step seamed to take forever. The Cad and Laser burning work seamed to be the worst.

My aproach was to take the mud motor idea and make something as tough as the traditional aproach but to try and make it as light as possible.

The weed eater aproach is much lighter construction than the traditional aproach. The end result has been a unit that comes in at 32 lbs in its latest version.

Because of the problems associated with the necessity of a clutch it is costing as much to build as a regular 6 hp longshaft. However it weighs half as much. When I get all of the fires put out with the current orders. I will get it posted on my web site. I hope that this happens by Christmas.

Have a great rest of the season gentlemen.

Mark F. Cheney
 
i pmed shawn but im curious as too others openions on this too what about a pulley system like on a surface drive motor and a moveble handle so when in mud you could operate the moter with out adding the drag of your own weight and motoering along while walking next too the boat
 
I use a J mIcro grove belt and pully system. I am initialy going with 3/1 reduction.

I extend my sympathy to any one who walks along beside a spinning propeller under any circumstances.

I considered spur gears initially and finally rejected them based on the screaming noice generated by the 8,000 rpm input gear. In the end the pully system is only 1" farther apart, center to center than gears would be.

Mark F. Cheney
 
I ran across this propeller design that might work well as far as thrust and with a motor system that would allow some torque. It goes along with the auger idea kind of similar to scavenger mud motors.

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http://www.designawards.com.au/application_detail.jsp?status=2&applicationID=2608
 
That is all I got. Just ran across it several years back and I know nothing more than what is on the website.



anthony i went too the web site and there is no contact info could you elaborate for me?
Click to expand...
 
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Scott,

Unless Anthony is the Australian that designed that thing in 2002 I don't think he can answer any of our questions. However since that was submitted to a design constest in 2002 and nothing has been heard about it since, the designer was not very serious about getting it to market. The first few web postings about weed wacker outboards I ever came across were from Down Under. they appeared to be handy motors for canoes and tender dingies in the outback.

I emailed the design contest to see if they can provide any details as to who made the thing and if they are still around.

I looks like a good device for building up a huge amount of weeds on the end of the motor. The prop appears to be a high speed unit probably from the RC boat arena. I would doubt that it would generate enough thrust to push a marsh boat. The weed whacker unit in the photo appears to be a standard sized unit of 30 to 32 cc's. I know that Down Under they have some brush cutters in the 43 to 49 cc range that would make perfect mini motors.
 
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