Check out the second testdrive in top gear, i went all out making the video, it turned out amazing! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3jOHCe9cku0.html
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.
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
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
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.
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
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.
Awesome. Thanks RU-vid 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
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.
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
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.
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.
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.
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.
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.
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 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.
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.
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
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!!!
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.
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
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 😉😄😄
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 👌
I love the build, but I would get a jet ski and take the jet power plant off and put it on that little thing ..I would leave motor on boat you have just jet drive it and it would be a rocket ship..👍👍👍🤘
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
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!
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.
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.".
Er bestaan quickshifters voor motoren. Dan hoef je het gas niet dicht te draaien. Het nadeel is dat het alleen perfect werkt wanneer je volgas hebt en boven in de toeren zit.
Like the build one thing the leg is prop and steering is to low and missing a prop it's early due prop volvopenta cool bit of kit I no it will be a pain but with the lift and right right prop it will definitely help with handling and has that leg got power trim leg and prop lift up good luck with the build just subscribed 👍
Hi! That was cool. But I found 1 mistake that makes your boat slower than it could be. Anticavitación plate of engine is much lower, than the bottom of your boat. It should be inline with your boat bottom. Propeller and underwater part of your engine leg must be polished, or you will have hell lost of speed.
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.
Oh no. That motor is more powerful than u think. I use to have the same bike bike. I did 160 no problem in 5th. The displacement makes up for the two missing pistons lol. The problem is it was a heavy bike. It’s a 600 pound bike. But that should move. I would think a little bit bigger prop would help
A Honda atv transfercase would be just about right to move the output over to inline with the outdrives input shaft... Or any industrial transfer case would work..
Just use a marine radiator, basically like a bike radiator but salt water cools the refrigerant can get expensive depending on size wich pretty sure that system you got pumps up water.
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
