Weed eater engine conversion

This is why I have a problem with him:

Posted 06-23-2004, 01:22 AM

Posted 02-23-2008, 11:46 PM

Posted 02-26-2008, 03:04 PM

Posted 03-21-2008, 12:31 AM

Posted 04-11-2008, 09:15 PM

These are his only post and he did nothing but spam his plans in every post, his initial post was nearly 4 years ago, yet in this thread he is new to the site. The guy is an ***, and got pissed at me for calling on the carpet. I could care less for his plans, he can shove up his........

I don't have a degree, but I still have money and time invested in the one I built and I gave it all away for free. Thats the reason I joined this site was because or the free flowing ideas and the willingness to share ideas. I look at thing differently than anyone else would, new eyes, so to speak. We all have a passion for boats or we would not be here wasting hours of our lives yakking it up with each other.

 

Something struck me as odd:

I am not throwing evlfkrjohn under the bus, but he did provide me with a seller name, I searched it and he hasn't sold anything on eBay in the last 90 days, if he worked so hard on the plans and they are so fabulous, why isn't he still selling them?

 

Funny, same result here.

 

Question

First time poster but I have followed this for quite some time and am nearly done with my weed whacker mud motor.

Anyone kow what kind of gearbox smmothseas200 (Dean) used in his design. I know that the motor I built will work as Ripped off put much time and effort into his and I basically copied this with some of my own modifications. I know that the motor would be much better with a 3:1 gearbox but have not found a way to do this. If I wanted a 1.5:1 gearbox I would just use the gearbox on a brushcutter but there are two things wrong with this - it is only a 1.5:1 reduction and it is then angled into the water. My design is for a mud motor, not an outboard motor.

Any help is greatly appreciated.

Mark W

 

humm i wonder if it would be illegal to post his stuff up on here??? does it have a copy right??? i don't even know post some responses

 

I guess it depends....

If the design that smoothseas has is different than what has been posted on here previously, I would not post the info not due to copyright infringement but because I wouldn't appreciate anyone posting plans that I spent some time on appearing on a public forum - just me. Copyrights aren't necessarily applied for and assigned, they are immediately granted to certain items.

If there is nothing new, copyright wouldn't apply and he could be the one in trouble. I would like to kow where a gear reduction could be found for the Ripped Off straight mud motor design. Believe me, I have been searching. I found a 3:1 gear reducer that would fit a Honda GX35 but it was over $100 I think. The whole idea here for me is to homebuild one of these things and do so inexpensively.

Mark

 

dude i was looking on ebay and they have some pocket bike motors with a gear reduction built all ready attached right near the motor

 

The China gearboxes like the one pictured are 5:1 and reverse the rotation of the engine. Clockwise or RH rotation tends to limit the prop options considerably; but they are cheap!

 

I would like to see the test data that demonstrates a 31cc petrol trimmer motor can develop 8.8HP.

There is plenty of doubtful or misleading information on this site and that is tolerable providing it is not intended to be used in selling something for a profit. I wonder if Mississippi State University knows their name is being used to back false claims regarding test data.

A 31cc motor would need to be supercharged in the extreme to produce 8.8HP. No way a stock motor could do it. Maybe more like 1 to 2HP. Somewhat more than a good rower could pump out but nothing like a rowing 8 could produce and even that is significantly less than 8.8HP.

This site provides detail on small trimmer motor HP:
http://www.alibaba.com/showroom/Weed_Trimmer.html
These are published by reputable suppliers so will need to stand some test of validity. The published numbers are likely to be slightly higher than what is possible because they would not include fan and shaft losses I suspect. Once you add a gearbox they will be even lower.

Rick W.

 

3to1 gearbox

Stanton inc. offers a 3.1 /1 gear box that fits on most of the engines used on pocket bike, power boards, small scooters,and motorized bicycles.

 

How cheap, Ender, and where do you get them? Do you have a link to a source for these items?

Don't waste your energy Rick, the guy appears to have posted several lies and now he has conveniently disappeared. Apparently his only motivation is to 'make money' and it seems he will attempt to do so by ignoring things the rest of us value -- like truth and integrity.

 

They run $25-35 bucks +shipping; but I have found them for less at times. Google or search e-bay under "scooter transmission" and you will pull some up with no problem.

The gearbox itself is die cast with spur gears and roller bearings. The unit is sealed with the exception of a vented plug which may or may not need to be addressed depending upon the orientation of the drop in the application. Most I have seen come with a 76mm clutch bell and an sprocket. The sprocket is useful in adapting the splined output shaft to fit various applications; either via chain or by utilizing the hub to adapt to another type connection (turning down the hub and welding part of a deep 8mm impact socket makes a great hex adaptor for 3/8" rod).

 

I made several runs, and top speed was 3.5 mph on my GPS. I don't know the weight of the boat, but there was a 43 lb battery in the back, a Minn Kota 30 lb trolling motor in there, a cement block(redneck anchor)and my fat azz, 260 lbs worth.The prop is not very efficient, I have several others on the way to test, and I will report back. I couldn't test it on the 14' Alum-weld, as the only aluminum angle I had was not big enough to allow me to C-clamp it to the back of it. I am having to offset plates made to set the engine off the back of the boat about 8", hopefully this will help, if nothing else it will make it more comfortable. Here is the video:



Here is my second version:



Same motor as before, Minn Kota Trolling motor bracket, same type of tiller handle, same prop, and a Expand It Edger attachment

Here is a mud motor style made by Rick Shaw:

Mud Motors by Rick Shaw

Here is his gear box:

 

Is it alright ........

if I post here to sellout something? Is it within the forum rules?

 

Orphanedcowboy,
That video was outstanding!!!!!!! when i get back from Iraq i am soooo making one. tell me what you guys think i bought basically the lower end to a 4-7 hp outboard and i am going to buy a pocket bike from eBay with the gear box already on for like $125 do you think it would be hard to attach the lower end to the motor? here are some pics