Until recently, I assumed those longtails were something that got cobbled together out of some necessity of available parts. Recently I learned they are purpose built to offer a ton of advantages for shallow situations with lots of weeds or obstacles to go over/around. They are also dead simple and relatively cheap. So, armed with that new found respect for the design, I'm keen to see someone like you figure out how to make the most fun use out of it. Hunting down the limits of speed, control, efficiency, and perhaps a quieter exhaust, would all be cool things to see. Cheers.

The thing about the 4-stroke is that it has more torque than the two-stroke in the power band so you can run the bigger prop or higher pitch impeller, you need like a 90mm impeller size which is what jetsurf uses to get enough volume. I'm running two 56mm pumps on my electric build.

i was talking about this 3d printed fuel cap some videos back 😕 and happy birthday to your dad.

It moves pretty good with the longtail on it! Not getting chopped up by the propeller is a good idea. Happy Birthday to your dad

Your adaptive skills are amazing. I like your determination to make it go. Like your video as usual.

CONGRATULATIONS I'M DOING A PROJECT WITH A 135CC MOTORCYCLE ENGINE, BUT HERE IN BRAZIL EVERYTHING IS MORE DIFFICULT TO ACCESS SOME TYPES OF MATERIALS BUT WE'RE STILL STRONG, HUG

More motors! I would like to see the firewall moved forward and another motor or two added to get the jet working. I think stay with the jet and just change the jet/motor until it works. Love the effort mate! Cheers.

Didn't your mother ever tell you never to take a hoverboard over water unless you got... Oh wait nice one dude.

I'd try the 80cc two stroke that you can get for push bikes off ebay as they also have a gear reduction gearbox and that should be more then enough to run that water jet

I think you should do what ever puts the big smile on your face 🖖

I don't care what direction you going to head...just have fun doing it...come on you can do it we are rooting for you :)

Great fun... through all the mishaps..but they don't matter..enjoy the time with your dad... priceless.. I know, l am the same age. Simon a Brit in Spain 👍

awesome build man, pity those little motors weren’t up to the job, looks like great fun with the long tail. keep up the great work and videos 👍🏻

Kawasaki js300 motor would work but is pretty big. I would look at a 2 stroke 85cc off a a motocross bike. They're in that 15-20hp and you could ditch the transmission and get the size down to what you need

You can also use a powerful brushless electric motor for it

I've been following this build for awhile, glad to see it on the water. I kind of expected that it would end up being underpowered. Jet drives are horsepower thieves. Maybe do a surface drive prop setup with the same twin engines, sort of like an rc boat.

Your Dad is badass! Tell him Happy Birthday. My dad is the same way. My dad is always there for when I test and work on my crazy projects like yours. Love your channel.

Super cool project. A couple near our cottage in the late 70's had a pair of Surfjets they would cruise on together..always wanted one. I love your catamaran too!

Now I'd try and fit that 4-stroke in the board to see how clean and small you can make it!

Koolest video demonstrating why longtail mudmotor are the best!!!!!

With the catamaran, the long tail and motor could be installed at the front to shorten the full system

What a project! But of a bummer the power was low but what a great save and what a great day! Wasn’t there but felt the fun family vibes!!!

While the first motor setup was underpowered, it still looked super clean! The 2nd might not have the looks, but at least it's got the fun!

Electric long tail sounds like a blast! Got me thinking!

The long tail is great, such a shame you can't fit a bigger motor in there. I wonder if cutting the gearbox off a 2 stroke dirt bike motor would get it done. There's not much left of a yz80 after deleting the box and clutch pack.

always put a smile on my face

You should put the 2 stroke engines back in and run a driveshaft out the back and stick a prop on it. May not be as fast as the longtail but would be more tidy.

had like a tear in my eye when the 2 50ccs didnt work, maybe a ktm 50cc or a chainsaw motor would be better. Carbon fibre reeds and a ported cylinder could add a wee bit but may not be enough. All in all well done bro, the board looks awesome 35km is fast.

80CC 2 STROKE DIRT BIKE MOTOR LOCKED OUT IN 5TH GEAR THERES YOUR JET MOTOR !. GREAT VIDEOS!!.

Wow that's an amazing build! Great work! I also use those engines to make RC cars and they work pretty well!

You can customize an 80cc 2t bicycle engine (change the stroke to 55mm) and use the ms660 (56mm model), ms070 or ms088 cylinder to achieve volumetric capacity above 135cc. You can improve compression ration to 11.5:1 or above and use E85 (85% alcohool and 15% gasoline). Here in Brazil exist a motor 132cc 2t from yamaha rd135 with impeller 93mm spin 7800 rpm is a good motor to motorized surf board.

Yay! Super Outboard Surf/Ski Love it & glad you're not quitting, I just found you LOL! Would like to see more catamaran sailing with your dad too. 😀👍⛵️💖

Honestly I think you've hit gold with this setup. Along for the ride whatever your next idea is. Cheers🥂

A friend made a similar board with a powerful electric drone motor and it worked great with plenty of speed.

What a cool project, so much learnt. Remember to push away if you fall off so the blender doesn’t get ya.

There’s no distance for the persistent love your work mate please keep it up for all of us Bucket heads👍👨🏻‍🏭

My thoughts were that’s awesome and please don’t fall off, nice job man keep it up!

Air intake will greatly restrict the flow. The heat from the exhaust pipes will cut the power way down. Maybe a pump and jacket the exhaust and a small bilge pump at the rear? Chainsaws go up to 90cc if you can find some used and rebuild? Jonsered or Stihl. Clearance for the impeller makes a big difference in efficiency. Race units are machined running ceramic bearings.

I’m glad you said that’s sketchy before I did lmao

Soo Huge effort in r&d with many many attempts with the two strokes and no luck, Cobble together a solution for the hell of it and it just works! Hmm Great effort!!

I would play with the tolerance of the prop. Ive had issues with that.

Your Dad is awesome 💯

I I think it was just a exaust leak for the first engines, I seen smoke pouring out of where your feet were, the carbs were probably not getting enough air

Love that beach was thinking of taking the kayak there yesterday.

Xzibit: Yo' dowg we heard you like boats so we put a boat on your boat so you can boat while you boat. hehe its a bummer it didn't get the speeds you wanted on the jet unit but stoked you saw it through tull the end and the long tail looked like wicked fun. since you've already got all the set up for gas engines what about the worlds first hybrid jetboard?... could do the electric drive and then use the engines you have with an alternator to power it... pretty sure with all the extra weight it wouldn't be as fast as a normal electric jet board but it would be 1 of a kind for sure. great work as usual and look forward to seeing what you come up with next.

Bringing back memories of a jet surf i had. Disappointingly slow but an experience

Why not use a small 125cc dirt bike motor or high hp kart racing motor? Should be able to get those around 20hp for an older one. Would love to see the jet working as intended, but still awesome this way too!

Consider: Much larger intake funneling larger volume of water x 4. Impeller longer x 2. Then a 2 to 1 RPM gear for the impeller. or something like that. Bo.

Would a 150cc-250cc scooter motor mounted on back with a chain drive to the jet work?

Great vid and channel mate, love your inventiveness and humour. If you ever need Hydraulic parts to hack or experiment let me know as I’m always throwing away blown hoses and fittings

The hours put into this project was crazy! The dual engine setup was crazy, wish it worked the way you had envisioned. You could throw a js300 motor and pump drive train in there and let it rip. Or go full send and somehow get a 701 motor and 144mm pump in there for some MACH 1 speed. Seeing a cr125 motor in there would be crazy too, probably enough power to push it, somehow delete the gearbox

Nice Board, I'm also building a Jet Board :) I'm using a 100cc 2 stroke 25HP kart engine. I just have to add an electric starter and manufacture a reliable shaft coupling. My Jetdrive is also 3d printed 89mm.

could try a offset flywheel key to increase the timing advance on the engines too bring the revs up more, or even a planetary drive

Was waiting for some guy on a paddle board to show up and pass him while trying to get the jet pump setup to work. (Still seems like some issue with the pump more than the motor, since it sounded like it was keeping up revs.) Good effort though.

Bloody awesome mate

you could strip out the powerhead of an old 2 stroke outboard, that would probably do the job :), tohatsu's m9.9d2 are really quick for their horsepower or the 18hp, their 25hp can be tuned to 32hp very easily. or you could do the yamaha 30 hp 3 cyl, very good motor.

I reckon it’s the impeller. I reckon you should try different impeller designs

If u use the aluminium as a mold u can make it from fiberglas way lighter and there is a bigbore kit 70cc for the minibike engine come.s with bigger carb greetz from the Netherlands Love your videos

DUDE!!! THAT IS TOO FKN AWESOME!!! I'VE GOTTA MAKE MYSELF ONE OF THESE

Hi, great experiment and fun. Search in grab cad propeller 147x309mm could you print, reinforce with carbon or fiber or casting and test to see if improve the performance? Thanks.

Daniel your awesome mate ya never give up that’s why I love your videos! Looks like a lot of fun!! Enjoy n have a great one brother!!!

First and best long tail surface drive NOT jet board 😀 awesome Dan. Shame about the jet drive but nice that you can swap between both options. Search for a powerful 2t motor but I love the electric long tail idea. Batteries inside and dry, motor outside. Big RC outrunner motor with torque for the surface prop but plenty RPMs. Easy to mount also, just need a bearing housing to support the drive shaft. What about a 125cc kart 2t motor? No gearbox, small centrifugal clutch or not, and up to 40bhp if liquid cooled monster! Only might be pricey... Be great to see the jet drive running.

It's not stupid if it works. I do prefer the jet tho, yz250 or similar?? Maybe needs more of a "V" in the hull for stability at 20 knots. Love it either way 👍

Always thought a powered hobie cat would be fun

You do you bro, I'll enjoy watching either way! Just keep plenty of those gold welding tips in there like the stainless bolt trick. Shout out from down Nelson in the SI

I truly enjoy your channel, learn with a giggle, love the channel and keep it up mate cheers 👍

Look into how to tune those carbs mate - sounds like they won't rev high enough to get into the power band of those pipes.

Looks like so much fun with the Honda clone engine on it. Great job.

You might get extra thrust if you could route the exhaust out the jet novel as well. Mixing the hot exhaust gas with the ejected water

id say make a smaller jet unit, it might be better since through it might put out less thrust but at least the motors can rev up

Overall awesome but I can see you are disappointed with the speed of the twin 2 stroke. My theory is your intake air is too restricted . If you can try it somehow with a much more open intake maybe it will work far better

Can you make some kind of belt drive from the engine shaft to a new lower propeller shaft, so that the prop shaft is lower? this would shorten the distance to the propeller. Anyhoo, looks great as is, looks like fun, cheers.

Hey mate. Very cool project. Makes me think i need to get a 3d printer and develop some skills like you have. Im a little disappointed you are giving up on the two-stroke jet unit. I hope you stick with it some more. To me it doesn't seem like a lack of power. It seems more like the jet unit is slipping a lot. On a full-size jet boat impeller design and the clearances between the outer diameter of the impeller and the housing (wear ring) surrounding it make a huge difference to the performance of the unit. Think of the jet unit as a pump rather than a propeller in a tube. I am currently building a small hull and intend to use the same engine you have with some type of homebuilt jet unit.

What about one of those petrol bike motors , they are something like 80 cc

mate you absolutely need to build that Honda gx200. delete the governor heavy valve springs. a rod high comp piston and a light weight flywheel and a mikuni vm22 would make that boat silly fast

Bring it back with a more power full motor

Nice!! Just extend the controls and you could run a longer pull start cord up the control handle too for big water restarts!!

hahaha your builds are awesome bro. always keeping it real and i love that the build just went straight to thai style long shaft.

Such an awesome video!!!!!

One thing seems tibe the norm on 3D printed jet drives, way too much pitch on the impeller. Try less pitch to get the rpm up and the engines to the pipe. Should get much better performance out of the board. Awesome build!

Looks like you're not getting the little motors into the power band...

Could you use a 20hp 2 stroke motor off an outboard? That way you could strip it down and make it flat enough to fit inside the board.

Why not try a motorbike engine like a rotax 122? They're about 33hp and would be relatively small if you cut the gearbox off?

Awesome video!

Could you do a break down on that prop shaft and little briggs you got? would be awesome. thank you

use the electric small block chevy swap and mount it on the board with a longtail. speed and aeruhnamics

That was awesome!

Bro! That hauls with the longtail! 😂! Sick!

Not sure if you said but ditch the jet and use the motors for a built-in long tail. Steering I guess would be the tricky part. Or would output be too low?

A few options that I could thinks of would be either a scooter motor with a big bore kit keep the gearbox on and there pretty quick or look up the rovan baja 5b rc cars those guys port them like crazy and play with crank case volume by filling the crank case with jb weld and get around 6 to 8 hp out of little weed wacker motors

Longtail catamaran. Go as far with that idea as you can Unrivalled for stability and load carrying

All that work and it goes 2 miles per hour… 8:52 then… UPGRADE!.. 😂

Can you show us how you made the long tail please. Interested in the shaft drive side.

Man I really enjoyed this video Daniel!!

Do you mind sharing the STL file for the stop button ( 00:08 )? We might have some use for it too.

Looking good man. You could put that long tail motor at the front an sit at the back. Seat , rudder , fun. Also. Modify your car to run on cng it's cheaper

nice move on the polisher ;) smooth as

3d printed parts have there limits but when you've reached those limits with plastic it's time to use those 3d models to make stronger parts like PLA casting in aluminum

Your dad is awesome!

I don't understand why/how the kill lines can be connected together, but they often can. my cub tractor is wired like that to the key switch, both tied together. the only thing I can think, maybe the wire is high enough impedance to not allow enough energy to transfer between the coils. not enough energy to make a spark on the opposing cylinder. only my guess.