It might be to your advantage to buy a used personal watercraft as a jet drive donor, I would keep the motorcycle engine setup, but have it run the jet drive instead of the lower unit. The jet drive will weigh less than the lower unit enabling you to achieve smoother acceleration and higher speeds on the water.
@@grizoh You're absolutely right. Propellers are substantially more efficient than jet pump impeller drives. They both have their pros and cons though.
Really neat little project. That drive is really deep though. Its slowing you down quite a bit. A jet drive would probably work better since it would push more directly on the back of the boat instead of 20" below.
Its an awesome build! Love the idea! And the cv joint takes care of so many engine/sterndrive problems. But I hate to point out your leg is too low, the planing plate of the leg should line up with the bottom of the boat, or even a "c" hair above the bottom on a fast boat
Awesome build MAKE SURE YOU CHECK THAT STEERING BOLT EVERY TIME mine fell out last summer going 35 and the boat went full left and almost flipped and ejected a few people lol
Awesome. Thanks RUclips for suggesting. Even the title looked like a good idea. 👍👍 Towards the end of the video when you started shifting gears👍👍... I am a subscriber now. Don't over load that gantry lift 😁. Great work
good job, the new drive will help a lot, i did not notice a bilge pump? are the waters around you shallow enough for a recovery? if they are deep i would suggest you fit a pump, its to good a project to see it lost.
Nice project. Trim tabs will allow you to keep the bow down at speed. That is a huge out drive for such a small boat. Is this a case of that is what I had so it is fine? Thanks for sharing
From Canada here, awesome that you have made all this work! Most North Americans are not willing to do this amount of work, but I am! I do crazy fun projects as well and think this is awesome. Lazy ppl that dont build their own stuff will criticize for not spending a fortune on everything but i love this! Keep up the adventures! New sub from me
You can also have another gear ratio to play with your plan of straightening the drive shaft. Then you can dial it in for like a 3rd gear take off with the light weight boat. No need to start in first unless ur stern drive gearing is heavy and cant get you on plane quickly. Awesome fun project, i look forward to seeing more. I should share the crazy thing im doing in Ontario Canada.
Wow! You’re a genius, did you figure this out on your own Einstein? You’re quite the detective. You figured out how to steer a boat. I’m just dumb founded at your brilliance.
Bro you should use an aftermarket exhaust it would make it sound really cool hahahaha keep up the good work! I just found ur channel and i just subscribed!!!
That Penta is not really made for RPM but, you can still dial it in using a prop slip calculator. You plug in gear reduction, RPM and Top speed and it will tell you how efficiently your propeller is working.
Make sure that outdrive isn't too low in the water. The top water intake hole should be inline with the lowest part of the hull. I couldn't tell if you had a whale tail on it, but if you don't you might consider it as it improves turning, efficiency, and time to plane. As far as the jackshaft idea goes, I like it, but personally, I'd move the engine back before doing it. Then again, I don't know much about boat weight balance, or that of this particular build, just that most boats have the majority of weight in the rear half.
For the cooling system, get a water to water heat exchanger. You use coolant in the engine, but it is cooled with a radiator in a tank with water flowing through it. They are used in “closed cooling systems” on many boats.
Eerste zin hoor je de nederlander😜goed gedaan man mensen die zoiets maken kunnen we hier meer gebruiken!!! Hoop de blauwe kakkerlakken je beetje met rust laten
Very cool I love boats and to work on them. Have you considered using a CVT transmission like the kind Polaris uses in their quads? I am sure you could fabricate any necessary brackets to get it to work.
That’s crazy bro . At first it looked like it was going to do a wheelie on water, then as it picked up speed it corrected itself and became a beast .😎 you are very talented my friend. The test drive Must’ve given you adrenaline rush lol . Keep up the good work 👌
Some built skis have around 350 to 500 horse. The thing that they lack is a 6 speed manual transmission gear box that a bike engine has. That changes the drive ratio of the turbine in the jet propulsion system that sucks the water from under the boat forcing it out the rear. That's wear the gain would be with a bike engine the only down fall is bending the drive shaft unit to that propeller in the the turbine resulting in catastrophic failure and possibly sinking the boat. If I remember correctly the best way of getting more speed is changing the pitch of the prop killing lowend but gaining topend if the engine has the torque to compensate with any type of boat engine you dont really need the hp your more after the torque because water is denser then rolling a car down the road.
I would build covers for that thing asap. I seen the same size jet boat vid sink cus he didnt have covers on an took on water over the back an it sank in 3 seconds really sucked to watch. But killer vid. I wonder how the props are gonna hold up the speed from the gears. An dang them seals where rubbing on its selfs. Very nice job 👍👍
Great stuff !! IF you straighten that shaft out, much there better. AND with a new prop and a "trim" to facilitate planing, so much the better. Speed is not your problem.
This will sound ridiculous but pay attention to the tempature of your fuel in that tank. It may not become an issue but there is a good possibility that your fuel will get pretty hot fairly quick having the system set up the way you do. Having a fuel pump running all the time like that essentially in a bypass situation creates heat. Even though its a small amount of fiel constantly being pumped your tank is also small so it can get heated very quickly. A Mr Gasket or Edelbrock 12v fuel pump for 3-5psi can be bought off ebay or amazon for $40.
Fantastic series thank you sharing. Having lived in the and on the water a majority of my life.....please consider the addition of three items: 1) Bilge pump.....if you inadvertently take on water the ability to get it out is imperative. 2) Fire suppression.....fire onboard is catastrophic. 3) PDF / life preserver Again..... thanks for sharing.
Awesome build man !! Die i/o sterndrive die zorgt wel voor een hoop weerstand. Zou mooi zijn als je er een surface-drive (arneson) van kan maken.......dan ga je NOG sneller 😉😄😄
Nice build. Id do away with the sterndrive and go I/O or Jet Propulsion. That would help eliminate drag from the outdrive but either way its pretty cool!
I don't know you personally or what you do in real life but having watching all three episodes and seeing your craftsmanship and mechanical capabilities it would be interesting to see what you could in a big boats workshop with professional grade equipment and parts, some people are giving you friendly advice about your drive system and they aren't wrong, you would be losing about 10-15hp maybe even more, something to think about in the future... "Superbike Engine Speedboat's Upgraded Drive System Pt4.".
Just a tip to get speed out of it get a bigger prop with the same amount of pitch and the cavitation plate should be a little higher than the bottom of the boat
Tandwiel/ketting aandrijving is sowieso een stuk beter! Dan kan je straks ook nog gaan fine tunen qua vermogen/rpm op je schroefas. Dan moet dit ding met de juiste propeller echt absurd snel kunnen worden
Great idea to have gears. Ever looked at a jack plate on outboard. Idea is to have prop half way below bottom of transom. Move x dimension up and back. Stainless prop will have less deflection more top speed. 4 blade is hole shot 3 blade for speed. Jet drive you will loose speed.
This does give me an idea - Take an older Yamaha Waverunner (running project boats are readily available for $1500) - it already has a marinized superbike 160 hp R1 engine, remove the upper hull, remove the front flotation block and move the gas tank to the back. Put a seat in front of the engine. The FX HO hulls are almost 13 feet long - Should easily hit 70 mph stock with the weight removed and a slightly repitched impeller.
The gears only slow you down. Water Thrust operates like a snowmobile centrifugal clutch. I would experiment which gear does the best and leave it there.
Hmmm,a superbike is made to switch 7 gears very quickly when accelerating,but a normal outboard has only 2 gears(forward and backward)but if you stick to long in one gear with this superbike engine you might blow up the engine.But this is a very interesting project!
I’d do a overdrive with the chain so you don’t have to shift. Since it’s a jet pump you want it to not be able to rev out all the way and hit limiter you want the pump to load it hard enough where it can’t over rev
Have you thought about sliding the engine over so the driveshaft is straight and putting the gas tank on the opposite side to compensate for the weight
wow that's fun. The outdrive is mounted a bit low though...the general rule of thumb is the cavitation plate should be even with the lowest part of the hull (the point of the "V"), or if it's further back, you can even have it above. If it is too low, it will create too much drag and also "bog" the prop down. It also affects the trim of the hull. Too late now i guess :) but you'd get higher revs and all around better performance if this key element was addressed.
that's also why you have that weird rooster tail happening. the water coming off the hull is hitting the cavitation plate wrong. If you get it up higher that won't happen, and that's how you'd know it was in the right place. If you want a quick fix for this you can change the pitch of the propellor to a lower pitch one.
I know, but it didnt fit higher. It works pretty good like this too as you can see ;) also i think the tail looks prety cool even tough its not efficient. Thanks for caring🤙🏻
@@homemade_madness yeah looks sick, having the gearbox helps, i guess you don't have to adjust the pitch of the prop since you have six gears. Hope the alignment modification works(worked). Seems like a good idea.
Did you use a quickshifter, because as soon as I saw that it said 2nd gear, I thought it would’ve nose dived as soon as you shifted? But that thing is baddass
do you have power tilt and trim ? Google torqe shift propeller ,, it was a prop w 2 different adjustments, got u out of the hole aka start, then shift for top end..
Check out the second testdrive in top gear, i went all out making the video, it turned out amazing!
ruclips.net/video/3jOHCe9cku0/видео.html
Nj
A front spoiler or perhaps some sand bags would go a long way towards keeping the front end down.
"Practical is boring". Me and you think alot alike. Love the video
It might be to your advantage to buy a used personal watercraft as a jet drive donor, I would keep the motorcycle engine setup, but have it run the jet drive instead of the lower unit. The jet drive will weigh less than the lower unit enabling you to achieve smoother acceleration and higher speeds on the water.
Exactly what i was thinking. I assumed it was a jet boat until I saw the goofy huge outdrive
Cleetus McFarland built a jet boat
ruclips.net/video/ZkSnth2irsM/видео.html
You actually lose a lot of power with a jet drive. With outboards a 150hp prop drive will be rated as 115hp jet drive. Same motor.
@@grizoh You're absolutely right. Propellers are substantially more efficient than jet pump impeller drives. They both have their pros and cons though.
Incredible build I must say thats a work of art. Driving a boat like that shift gears must be fun lol
That outdrive is slowing you down. Straight inboard, shaft prop and rudder. Much Better...
V2.0 v drive
@@prtyof4156 Jet drive would be better for shallow water.
Surface drive....
Leave the link to the one that you built??? 🙄
@@justincasey_grabbederpussy6756 he’s not hating he’s giving advice
Really neat little project. That drive is really deep though. Its slowing you down quite a bit. A jet drive would probably work better since it would push more directly on the back of the boat instead of 20" below.
I concur...it’s also providing some scary handling characteristics and in the right situation could cause the boat to porpoise and capsize.
Its an awesome build! Love the idea! And the cv joint takes care of so many engine/sterndrive problems. But I hate to point out your leg is too low, the planing plate of the leg should line up with the bottom of the boat, or even a "c" hair above the bottom on a fast boat
Awesome build MAKE SURE YOU CHECK THAT STEERING BOLT EVERY TIME mine fell out last summer going 35 and the boat went full left and almost flipped and ejected a few people lol
Or just weld it and cut it off if you ever need service
great build, I think when you go to fix the cv joint with the chain idea gear it up so you can get a better top speed
You’ve build a dune buggy,a boat now a air plane? A mini bike would be cool or even something with tracks!! Love the vids
Im planning on building a new buggy🙈🙈 😁
Have a look at the channel rather b welding he makes cool dune buggies
@@homemade_madness ooooh cant wait to see that video!
I vote for airplane.
Awesome. Thanks RUclips for suggesting. Even the title looked like a good idea.
👍👍 Towards the end of the video when you started shifting gears👍👍... I am a subscriber now. Don't over load that gantry lift 😁. Great work
good job, the new drive will help a lot, i did not notice a bilge pump? are the waters around you shallow enough for a recovery? if they are deep i would suggest you fit a pump, its to good a project to see it lost.
Nice project. Trim tabs will allow you to keep the bow down at speed. That is a huge out drive for such a small boat. Is this a case of that is what I had so it is fine? Thanks for sharing
From Canada here, awesome that you have made all this work! Most North Americans are not willing to do this amount of work, but I am! I do crazy fun projects as well and think this is awesome. Lazy ppl that dont build their own stuff will criticize for not spending a fortune on everything but i love this! Keep up the adventures! New sub from me
Thank goodness that boat dolly didn't break while under such a load!! Nice work young man!!
You can also have another gear ratio to play with your plan of straightening the drive shaft. Then you can dial it in for like a 3rd gear take off with the light weight boat. No need to start in first unless ur stern drive gearing is heavy and cant get you on plane quickly. Awesome fun project, i look forward to seeing more. I should share the crazy thing im doing in Ontario Canada.
Wow answers a lot of questions. Don't stop looks good to me.
Yeahh😁😁
The outdrive is hanging way too low. You have to lift it maybe 10 cm or more to get max speed.
Althoug your completely right, you gotta respect the hustle
That alignment is mint 👌🏻
You should turn the engine at an angle, not square on, that will give you much less angle in your propshaft to the stern drive.
@Daniel B
Correct and a guard covering the whole incase one end or the other let's go .
Wow! You’re a genius, did you figure this out on your own Einstein? You’re quite the detective. You figured out how to steer a boat. I’m just dumb founded at your brilliance.
gets on plane quick....good job man.
Bro you should use an aftermarket exhaust it would make it sound really cool hahahaha keep up the good work! I just found ur channel and i just subscribed!!!
Nice build, But I think U missed something 🤔🤔🤔🤔 First testdrive-homemade-on Water 🤯 Life jacket!!!!!
Love it. The drive is 1/3 of the size of the boat!! Great stuff!!!
That Penta is not really made for RPM but, you can still dial it in using a prop slip calculator. You plug in gear reduction, RPM and Top speed and it will tell you how efficiently your propeller is working.
Make sure that outdrive isn't too low in the water. The top water intake hole should be inline with the lowest part of the hull. I couldn't tell if you had a whale tail on it, but if you don't you might consider it as it improves turning, efficiency, and time to plane. As far as the jackshaft idea goes, I like it, but personally, I'd move the engine back before doing it. Then again, I don't know much about boat weight balance, or that of this particular build, just that most boats have the majority of weight in the rear half.
I know its too low. I like to keep the engine forward ad much as possible to keep the weight in the middle👊🏻
I've been waiting for this one!!!
For the cooling system, get a water to water heat exchanger. You use coolant in the engine, but it is cooled with a radiator in a tank with water flowing through it. They are used in “closed cooling systems” on many boats.
That’s an awesome project. Be even better if you pretty it up. Thanks for sharing. 👍🇦🇺
A very nice boat that you have built. A nice little runabout that's good on fuel and it's fast. Music, not so hot.
You are welcome.
That looks like too much fun can't watch without smiling
Respect, goed bezig
Mooie opmerking ,little play in the steering
Eerste zin hoor je de nederlander😜goed gedaan man mensen die zoiets maken kunnen we hier meer gebruiken!!! Hoop de blauwe kakkerlakken je beetje met rust laten
This is the first boat I’ve seen with a transmission, sweet from Cali, USA 🇺🇸 👍👍👍
What you think big off shore cats run with chopper engines run 2 speads
I love how you left the transmission.😁
That thing looks amazing to drive nice!
Very cool I love boats and to work on them. Have you considered using a CVT transmission like the kind Polaris uses in their quads? I am sure you could fabricate any necessary brackets to get it to work.
That’s crazy bro . At first it looked like it was going to do a wheelie on water, then as it picked up speed it corrected itself and became a beast .😎 you are very talented my friend. The test drive Must’ve given you adrenaline rush lol . Keep up the good work 👌
14:35 "Didn´t sink...well...that´s important"
You´re hilarious xD
Nice work, looking forward to the next video mate!
Hahah thanks!
Pretty sure a lot of jet skis have more hp than that but still really freakin cool
That really depends. A jet ski can have 50 hp but most jet skis are about 100 hp. Crazy expensive 1s with superchargers have like 250 hp.
Some built skis have around 350 to 500 horse. The thing that they lack is a 6 speed manual transmission gear box that a bike engine has. That changes the drive ratio of the turbine in the jet propulsion system that sucks the water from under the boat forcing it out the rear. That's wear the gain would be with a bike engine the only down fall is bending the drive shaft unit to that propeller in the the turbine resulting in catastrophic failure and possibly sinking the boat. If I remember correctly the best way of getting more speed is changing the pitch of the prop killing lowend but gaining topend if the engine has the torque to compensate with any type of boat engine you dont really need the hp your more after the torque because water is denser then rolling a car down the road.
@@uglyfxxx6981 supercharged are 300 these days.
I would build covers for that thing asap. I seen the same size jet boat vid sink cus he didnt have covers on an took on water over the back an it sank in 3 seconds really sucked to watch. But killer vid. I wonder how the props are gonna hold up the speed from the gears. An dang them seals where rubbing on its selfs. Very nice job 👍👍
I will! Thanks!
Great stuff !! IF you straighten that shaft out, much there better.
AND with a new prop and a "trim" to facilitate planing, so much the better.
Speed is not your problem.
Thank you! I love your videos!
This will sound ridiculous but pay attention to the tempature of your fuel in that tank. It may not become an issue but there is a good possibility that your fuel will get pretty hot fairly quick having the system set up the way you do. Having a fuel pump running all the time like that essentially in a bypass situation creates heat. Even though its a small amount of fiel constantly being pumped your tank is also small so it can get heated very quickly. A Mr Gasket or Edelbrock 12v fuel pump for 3-5psi can be bought off ebay or amazon for $40.
Second thought outdrive might be good seems to ride correct
Please put a jet drive in that thing . Looking good 👍 keep it up
Fantastic series thank you sharing. Having lived in the and on the water a majority of my life.....please consider the addition of three items:
1) Bilge pump.....if you inadvertently take on water the ability to get it out is imperative.
2) Fire suppression.....fire onboard is catastrophic.
3) PDF / life preserver
Again..... thanks for sharing.
Yo those dual exhaust look bad ass 👀😎
pretty sick build there!
Excellent build
Awesome build man !! Die i/o sterndrive die zorgt wel voor een hoop weerstand. Zou mooi zijn als je er een surface-drive (arneson) van kan maken.......dan ga je NOG sneller 😉😄😄
Nice build. Id do away with the sterndrive and go I/O or Jet Propulsion. That would help eliminate drag from the outdrive but either way its pretty cool!
Yes spot on
What a cool project 👍
Really cool build but the drag must be insane with the drive that deep in in the water
It looks worse than it is😁
Nice cool having the gears to change through!
very neat great job keep up the good work
If lighten drive shaft and just run straight prop it be a lot faster and move fluid, great build
I don't know you personally or what you do in real life but having watching all three episodes and seeing your craftsmanship and mechanical capabilities it would be interesting to see what you could in a big boats workshop with professional grade equipment and parts, some people are giving you friendly advice about your drive system and they aren't wrong, you would be losing about 10-15hp maybe even more, something to think about in the future... "Superbike Engine Speedboat's Upgraded Drive System Pt4.".
Thanks! I have plans for building my own jetski this winter😁
This thing is awesome !
Just a tip to get speed out of it get a bigger prop with the same amount of pitch and the cavitation plate should be a little higher than the bottom of the boat
Step 1: Search for a boat with a bike engine.
Step 2: Find your videos.
Step 3: Watch your videos.
Step 4: Subscribe.
🤟🏼🤟🏼🤟🏼🤝
Tandwiel/ketting aandrijving is sowieso een stuk beter! Dan kan je straks ook nog gaan fine tunen qua vermogen/rpm op je schroefas.
Dan moet dit ding met de juiste propeller echt absurd snel kunnen worden
This was so cool, it worked soooo well!
Great idea to have gears. Ever looked at a jack plate on outboard. Idea is to have prop half way below bottom of transom. Move x dimension up and back. Stainless prop will have less deflection more top speed. 4 blade is hole shot 3 blade for speed. Jet drive you will loose speed.
🤣🤣🤣Travel Lift for that tiny boat ...awesome
Wow! This is my dream project
Great work I thought the leg was to low but she planes very smooth. Nice.
Very Cool!! Great Work!!
Great job man!!!
Super gelukt weer, hij ligt mooi in het water als je op snelheid bent 👍😊
This does give me an idea - Take an older Yamaha Waverunner (running project boats are readily available for $1500) - it already has a marinized superbike 160 hp R1 engine, remove the upper hull, remove the front flotation block and move the gas tank to the back. Put a seat in front of the engine. The FX HO hulls are almost 13 feet long - Should easily hit 70 mph stock with the weight removed and a slightly repitched impeller.
Bloody fantastic
The gears only slow you down. Water Thrust operates like a snowmobile centrifugal clutch. I would experiment which gear does the best and leave it there.
Hmmm,a superbike is made to switch 7 gears very quickly when accelerating,but a normal outboard has only 2 gears(forward and backward)but if you stick to long in one gear with this superbike engine you might blow up the engine.But this is a very interesting project!
Cool!good job 👍
Great job :)
You should put in a massive jet drive!
Goed bezig! Hij is wel echt snel😂
Thats awesome! Honda superhawk engine?
Well done!
Very strong engine ..yes only the drive shaft should be align to have less vibration and not to break the ribbed boot. ..excellent modification ..
lekker bezig
Stellar job mates keep it up ❤️👍🙏💕🌈🇲🇾🤗😎
Nice build👍
I’d do a overdrive with the chain so you don’t have to shift. Since it’s a jet pump you want it to not be able to rev out all the way and hit limiter you want the pump to load it hard enough where it can’t over rev
Have you thought about sliding the engine over so the driveshaft is straight and putting the gas tank on the opposite side to compensate for the weight
Subscribed, very cool man
wow that's fun. The outdrive is mounted a bit low though...the general rule of thumb is the cavitation plate should be even with the lowest part of the hull (the point of the "V"), or if it's further back, you can even have it above. If it is too low, it will create too much drag and also "bog" the prop down. It also affects the trim of the hull. Too late now i guess :) but you'd get higher revs and all around better performance if this key element was addressed.
that's also why you have that weird rooster tail happening. the water coming off the hull is hitting the cavitation plate wrong. If you get it up higher that won't happen, and that's how you'd know it was in the right place. If you want a quick fix for this you can change the pitch of the propellor to a lower pitch one.
I know, but it didnt fit higher. It works pretty good like this too as you can see ;) also i think the tail looks prety cool even tough its not efficient. Thanks for caring🤙🏻
@@homemade_madness yeah looks sick, having the gearbox helps, i guess you don't have to adjust the pitch of the prop since you have six gears. Hope the alignment modification works(worked). Seems like a good idea.
Echt super vet gemaakt man 😎👍
Great 1st try
Just brilliant.
Echt geweldig!😍
UJ's are not really meant to run at acute angles permanently like this, just flexibility. Otherwise good idea.
What in saw were CV joints . Something entirely different ....
Dude you're so awesome!
You can get a low pressure fuel pump that is made for carburetors, 2.5-5 psi. Look into it.
Pretty cool kid ! 👍
Did you use a quickshifter, because as soon as I saw that it said 2nd gear, I thought it would’ve nose dived as soon as you shifted?
But that thing is baddass
do you have power tilt and trim ? Google torqe shift propeller ,, it was a prop w 2 different adjustments, got u out of the hole aka start, then shift for top end..