The super crazy cool mini long tail build!!!!

[Wolfgang123]

so i have decided that i am going to do 1 of 2 things to power my new raft...

1. weedwacker with a prop, like this:

http://www.terryking.us/boating/RippedOffWeedwhacker.pdf

2. or i am going to use this:


http://cgi.ebay.com/ebaymotors/New-49cc-2-Stroke-Engine-Super-Pocket-Bike-G-Scooter_W0QQitemZ220553825201QQcmdZViewItemQQptZMotorcycles_Parts_Accessories?hash=item335a084bb1

with the transmission and electric start. so my questions are:

1. which method would you choose and why?
2. which setup would provide for power? ( i think the second one but just want to double check)
3. if i go with option 2 should i look for a transsmission with a 3:1 ratio or 5:1?
4. what size prop should i use with the 2nd option
5. how the hell do i go about adding th tail and the prop to the second option? i tried skimming thoough the weedeater thread (54 pages and not alot of answers) and could not figure out what to do as far as the shaft coming out of the trans. and how to mount the prop.

thank you in advance and if i can figure this out i will be sure to write up a nice How-to/Build thread.

Skyler Nikolas

[TollyWally]

To pick a suitable motor you need to know much more about the proposed boat.

For a mental exercise to help make a choice imagine what the correct storebought outboard might be, then brainstorm your equivilent, then refine details.

Search surface drives for some insight on how to graft together your frankenmotor. There's lots of fodder for ideas on the site here to help you invent this thing. Dig around.

[Wolfgang123]

i understand what your saying. with that in mind i think i am going to go with the second version, so what i need know now is how do i make it? i understand the transimmison and the motor parts, but how do i attach the driveshaft to the transimmisson and how do i attach the drive tube to the transmission?

[hoytedow]

Click on this: http://www.boatdesign.net/forums/diy-marinizing/weed-eater-engine-conversion-1681-50.html

[Wolfgang123]

thats cool but not what i am looking for. too heavy

[Wolfgang123]

http://www.kansashunter.org/sites/default/files/Mini%20Longtail%20Plans%202.0.pdf

i feel dumb just found that.

so my only questions now are as follows:

1. How do i mate the drive tube and drive shaft to the scooter transmission?
2. If i were to make one without the transmission (with the honda parts that ender posted) would the drive tube and drive shaft just clamp in to the honda parts?

[wac m trac m]

Guess you diidnt read all of the looong weed eater forum. We all built moters like the first option. I used mine on a 10ft Stealth 2000 but most guys used them on lighter layout boats. We all agreed they were to weak. Even John Oneal who came up with the best ones. He had the carbs reworked and he still wanted more power.

Towards the end of the long thread some guys from Tailand has a nice set up that he's selling. It's all put together and just bolts on. I tried to buy one but he never responded to my calls.

If you really want to build one. Read everything you can get your hands on. Then fill the gaps with creativity..thats how it's done.

[Wolfgang123]

i basically got the jist of that yes. but i am going to be putting this on a little canoe and and some friends use to get to and island to go camping. so i dont need much.

[Wolfgang123]

the problem is the canoe is not suppose to use more than a trolling motor due to weight. so i thought this would be th next best thing. (i hate trolling motors)

[muddin redneck]

john o neal is the guy that built the one with the gear reducer try to pm him with your questions im sure he will be glad to help you with the conversion

[fishon91]

look in the surface drive section. theres a guy that built a longtail with gears, you could substitute the gears for your CVT. you have a very good idea. and you definitely need to put it on something more stable than a canoe cause it'll be faster than you think.

go ahead and go big, buy a 15' godevilo skiff, build your motor, and maybe even push through mud flats:P

[fishon91]

oh mcmaster carr has you covered with bearings, seals, etc... great company

[Wolfgang123]

ok so considering i already have a 6.5hp race motor (honda clone) laying around i figured i will just go ahead and build the larger version. so so so, my crap boat wont be able to handle this motor so my question is, i see all these foam layout boats your guys have, is there a DIY on those i can look at?

[Wolfgang123]

also what do you guys think would be better. the u-joint with no clutch. or the clutch to a sprocket setup? which would give me more speed.

[muddin redneck]

if you use a 4-stroke engine (oil in crankcase not mixed with fuel) then you have to be careful on how much angle your engine will be sitting at while it is running about 15 degrees is all you can have and still operate it without damage to the engine. if you dont use a ujoint you will have to make the shaft longer than you would if you used a ujoint bc of engine tilt. look under lifan thai longtail in this forum pistn broke built one just like your talking about. i would go with the gear reduction built leave out the clutch granted you have a neutral but you get a wider range of speed if you dont use one (idle to wide open). just my 2cents. good luck with your build.

[Wolfgang123]

ok guys i think we can scrap this thread i found this: http://www.duckhuntingchat.com/forum/viewtopic.php?f=72&t=66371

and thats what i am going to do. should weight alot less and handle better. i have almost everything figured out but i think its going to be one of those things were i just have to jump in and see what happens.

[Wolfgang123]

hey guys so one last questions figured it wasnt worth opening a new thread for soo...i am goign to make a foam layout boat and i was wondering what kind of epoxy rensin and hardenering agent i need???i plans i bought dont really say what i need and there are a varity of things from 90z to 60z fiberglass cloth all kinds of hardener and resin????help...

Thanks
Wolfgang

[hoytedow]

Try your local marine supply house. Lots to choose from. Talk to the sales people.

[Mark Wo]

First of all, John O'Neal will tell you that the 49 cc motor with a clutch worked very well. I built the exact same weed eater motor and it pushed my 60 pound boat and my fat but 6.2 mph. I used it for a season of duck hunting and it did all I wanted it to do. I went upstream, downstream across lakes you name it and it worked great. I would not use it as a true mud motor - it just doesn't have the power. It goes through weeds but mud no way.

John did build a motor with the 5:1 reducer shown in the thread where you were looking to purchase a motor. He put a huge prop on it thinking the reducer would allow him to spin it. It worked but I think you will find that going with the stock 49cc motor and no reducer worked better.

You are not going to be happy with a 6.5 hp motor on the back of your canoe - no way. Too heavy and it will make the canoe very unstable. Hope you aren't going to be putting family or friends in it with you.

I also had an opportunity to purchase a used Rickshaw Mud motor for less than retail. It is a 4 stroke Honda with about 1.2 hp and uses a 3.1:1 gear redcution system. The little Honda motor (GX35) with the reducer is more than enough power to push a canoe or the boat I use it with. These boats will only reach hull speed (about 5-6 mph) with either a 2 hp or 5 hp and it will take more hp to get the canoe up on plane if that is what you are looking to do. Once again, a canoe on plane is not a bright thing to do.

Take the advice of an earlier post and read the whole 55 pages of how to build one of these . You will learn boatloads from this thread and peopel there are willing to help.

Mark

[Wolfgang123]

thanks for the advise but i have gone a totaly different direction. i plan to make a wooden 14 foot jon boat and add a 13hp surface drive to the back (home made of course :)