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Hello it is a 27cc engine. Now i have a 50cc engine from a 4 stroke weed eater that i want to use next time. If we want it to last a long time we will have to make a use a bearing for the two ends of the roller so it reduces the pressure on the crankshaft

Thanks it is still a prototype in progress but all the parts are there. I would get a real driveshaft made from one piece of 3/4in steel with both ends machined at a machine shop and bushings or bearings instead of wood pieces. Look at my belt driven version that uses normal boat propellers and not rare propellers from vietnam. If i was to do it again i think i would install the whole thing through the floor of the boat (canoe) and run the exhaust so the end is underwater because it makes a lot of noise. The summers where i live are very short so i dont have much time to test it so i lost interest, hopefully you will continue my research

At the store but go to a machine shop and buy a 3/4in x96” metal rod and have them machine the threads at both ends or it will end up breaking

@@boatfabricationchannel2991 what ends up breaking? The screw off the rod ends up breaking where you welded it?

Yes the end of the driveshaft ends up breaking because its not aligned properly. It can last from 5 seconds to 90hours. I have not done extended upgrades because we can only use our boats for 3 months of the year where i live so its kind of a useless invention for me.

Yes but its supposed to be 3/4 " because thats the normal size they use in the kits you can buy. I was just too cheap and tought it would work but it ends up breaking

i dont think so but you could use a chain if you want

Oui

I have come to the conclusion that if you want to go super fast just buy a 20hp outboard. This invention is more for trolling around at 10km/hr unless you are an expert that have built probably 100s and live in a place where you can test it every day. Its hard to go fast because you need a boat that is extremely lightweight and narrow (24inch wide) so you have to build it yourself but going slow is easy. I dont want to demotivate you so good luck with your invention

No i dont use the u joint anymore it was from one of the first versions you can see how clean my garage used to be. I would definitly recommend you go to a machine shop and buy a 10 feet long 3/4in rod and get threads machined at both the ends (one for connecting into the engine and one for the propeller to screw on). My homemade driveshafts end up breaking after 1 to 40 hours probably because they are not aligned properly because i made them from welding 1/2" rod together. Look at my version that uses the belt drive in my other videos thats the way i will make them from now on because i have more choice of propellers. I kinda lost interest because i can only test this invention 4 months of the year because of the cold temperature so now i make motorized bikes instead

@@boatfabricationchannel2991 I appreciate yor answer. And regarding connection of propeller shaft to engine just by M8 threaded rod end... is it enough strong? Did you habe some troubles? This stacionare engine use to have in shaft hole with thread just M8 x 1,25 ... isnt it to tiny? Thank you

@@janzahoran9868 hello the real professional kits use a 3/4 in (20-22mm) shaft with the ends that are 5/16in (10mm) or 3/8in (12mm) to thread into the engine. We will have to copy this size if we want it to work good and not break. If you use a m8 threaded rod it will be too small and break because of the force, also the threaded part will wear out the wood bearings, sorry i have tought about it before. Maybe you could have an adapter that goes outside the shaft of the engine instead of threading into the end. That adapter would then connect to the 3/4in shaft without the need for threads. After 16 prototypes i have come to the conclusion you need a 3/4in driveshaft there is no other options

@@boatfabricationchannel2991 yes that makes sense. And please do you use stainless steel tube and stainless steel shaft? Thanks

@@janzahoran9868 no just normal steel, also you want to exterior tube to be strong and not flexible at all, i use 1 inch black pipe ( 1 3/8in exterior diameter) which is used in houses for natural gas for the furnace. Now you make me want to build a new version lol i have an upgraded design in my head for 9 months

Hello i used a 7 inch propeller

Merci lol je m’en sert encore a chaque jour presque mais je l’ai mis sur un autre bicycle plus style mobilette y faudrais que je fasse un autre video. Je veux m’en faire un autre avec un moteur de souffleuse plus style "smiths motor wheel" pour avoir plus de puissance dans les côtes et moin de son. Sur le plat cest super genial le moteur de weed eater mais dans les cotes ca ralenti extremement. Moi j’aime mieux quand cest silencieux et economique en essence

Connaissez-vous Oliver Motorised, c'est intéressant ses vélos motorisés. Si vous avez l'intention d'installer un torque converter prenez en un pas trop cheap ou montez pas trop le rpm. J'ai monté un Prédator 212cc sur un vélo et le torque converter a juste blower out.. c'est pour ça que pour l'instant j installe un weedeater.😁 PS je comprends le trip de jouer avec ça 👍

@@levagabond9489 oui jai vu ses video cest pas pire sauf que ca me tente pas de modifier mon frame car je sent que ca briser lol. Prochain bicycle je vais surement mettre une clutch centrifuge avec une belt. Moi je suis rendu un amateur de friction drive car ca fait 40h d’utilisation (sur mon compteur)que je me promene et jai jamais eu aucun probleme. Je fais toujours des rides de 3h. je trouve ca tellement malade

Meme les chars quand je me promene ils trouve ca malade y font des videos et ils klaxonne. Mon voisin veut s’en construire un a force de me voir passer

J'ai finalement trouvé une petite sprocket a vélo, j'ai mis une chaine plutôt qu'une strap. Moi non plus, je ne coupe pas les frames.. surtout que j'ai trouvé un schwinn des années 50-60, je préfère le garder dans sa forme originelle. J'ai fait un rack pour le trimmer, y reste pratiquement juste un tendeur a installer avant de l'essayer. Bravo pour tes vidéos, j'ai hâte de voir tes prochaines 👍

Yes this was more a test to understand how to make a system with the belt drive. I think the engine would be better if it was installed in front of the user as an inboard because the controls and the recoil start are inverted but i dont really want to have the fumes coming at me all day long

Thanks the design i copied from a guy called hien thich che on youtube. If you do it make sure to use a driveshaft that is 5/8” large because the end tends to snap off close to the engine on my 3/8 driveshaft. If you can the best way would be to make the driveshaft from a single piece a 5/8 rod around 100” long and machine the threads at both end. I cant do it because the price would be astronomical at a machine shop.

Didn't he take the carburetor off and put it on the new one..

ok i will integrate that idea for my next generation of drive system this summer

31km/hr look at my video called building a boat from plywood you will see it in action

And in the description i have a video of me building this thing you will see the welding process

@@boatfabricationchannel2991 awesome thank you

I built a mini boat a few yrs ago but it doesn't have any rake in the front. Was gonna convert it to gas motor instead of trolling motors just as proof of concept. Feel free to give it a view it's in my videos. Thanx for making informative videos

I tapped the splines of the propeller with a tap and i have threads at the end of my driveshaft because i welded a bolt to it

With a 3/8 tap

Polyester because its cheaper but i have used epoxy in the past it was 10 times the price or 100$/L

Hello i have not been able to test the max speed because i only finished the invention at the end of the summer so the water was too cold to use my small boat. But i have used the same 4hp propeller on a yamaha 4hp outboard and reached 32km/hr. I think on a longtail it will reach the same speeds. I can make another video of building a small boat for you. From now on i will only use right hand propellers because its more common for most people that watch my videos and want to try it and i already have a variety of 4,10,20hp propellers

​@@boatfabricationchannel2991 did you have time to test that propellers already?

@@janzahoran9868 no i have not tested my invention again this summer because i live in canada and this invention is not very useful to me because i can only use it 3 months of the year or else the water is too cold or frozen and its dangerous hopefully someone else will pick up on my research. also the driveshaft snapped right between the pulley and the bearing probably because the driveshaft was too small at 3/8 inch. i would use a 3/4 inch driveshaft next time because this is what the professional kits use and get some splines machined at the end for the propeller. I am on a streak of inventions that dont work for a year now.