Testing the 100HP Mini Jet Boat With a 18v Drill! 

Test drive with the 100 HP engine here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-l8ahwD6wSpk.html

Build a trailer to haul the boat behind one of the power wheels

This is literally my favorite project you guys have ever done it’s awesome to see you guys expanding over the last year from growing your team to tackling bigger and better builds

Just two grown men in a tiny jet boat going powerwheels speed. Just what I needed to see today.

Watching them both in the boat going in circles having a great time was hilarious 🤣

It sure is nice watching your little "plumbing" company grow so much over the years that I have been following your channel. From that first build with the Barbie cart, all the different cars and trucks and other 4 wheeled vehicles and right up to now Grind Hard Plumbing also has become a boatyard as well. Your little group has and most likely will grow much bigger. When are you guys going to start the new shop build? I know that I'm not the only one waiting for that to start. Hopefully, it will get lots of video coverage, just like your other builds. Keep up with the great work, doing what you do has been a pure pleasure to watch and I'm sure that there will be many more wonderful videos for your fans and friends to view. THANKS!!

Finally!! Bring back the shorter but more often videos! I need at least 2 a week! Good job as always guys!

I was grinning like an idiot watching you two move around in that little boat powered by the drill. Simply joyous.

This episode was so satisfying and relaxing. Great soundtrack. I imagined watching it in a classy lounge setting, sipping a hot cappuccino in a hot tub on a patio of a snowy mountain lodge.

This build is going to be so cool when it’s done. I hate to be a downer, but I’ll be shocked if that pump tunnel doesn’t cause the pump to cavitation super bad. Not only is the opening much smaller than the pump itself, but the sharp corners and “arched” space just before the impeller will likely lead to air pockets forming at higher rpm’s. Keep in mind that the drill at full rpm is basically idle speed for that kawasaki 750, so spinning 3-4x the rpm with a pump tunnel that’s not very streamlined will almost certainly yield cavitation. Hopefully that’s not the case and it works exactly how you’re building it, but if it doesn’t, I think moving the engine to the front, building a longer driveline, and smoothing/lengthening the pump tunnel might be your best bet. This would allow the drive to sit a bit farther back and not be so cramped as well!

Seeing that demo with the drill at the end was GLORIOUS!

These guys are innovators beyond their humility. Always impressed. Thanks for your channel, I learn something every time.

So glad you all keep finding new projects, bring on more projects!

Lol built lots of jet boats here in nz. This is going to be awesome. Intake could be an issue but keen to see if it works or causes cavitation at speed. Note the nozzle will work better out of the water as the nozzle velocity is way higher , watch the marthon racing boats for a demo of this. This caught bill hamitlon out when he built the first jet units as he had the nozzle exiting underwater but found the boat went way faster with nozzle above the water line.

Your builds are Awsome. You need to get ahold of Cletus McFarland and do some jet boating.

Both of you in the lil drill powered jet boat was epic! Looking forward to the Full Send!

I love your arc droid table. Nothing better than building the right hardware for your favourite gear, or sometimes even building your favourite hardware into your favourite gear.

(From a naval architect/boat engineer) Can't wait to see it all together! The shape of the jet drive kills be a bit though. If the interior volume of the drive should be more of a wedge shape and less of a mailbox shape. If it is more of a wedge shape (less vertical at the impeller bearing) you will get better flow and more thrust. The present shape will cause a lot of eddy making resistance and possibly cavitation.

Went well with the drill ! Going to be a handful with 100hp!

Loved the whole video. Very impressed with how the tunnel cover made from "17 different steps on the metal brake" turned out. Keep the content coming.

It’s so cool that you build stuff to build stuff! Killer boat and can’t wait to see full send!

I would definitely look into make a scoop intake grate for that. With the reduced flow of water coming into the pump area you may run into so surging. Worx makes a great one to replicate.

I love the property you guys have, absolutely beautiful spot

I love how that jet boat is coming together! That thing is going to scream once it's all done! I love the compact plasma cutter stand! Very clever, as usual for one of your designs.

I just love how you guys make everything out of so little even though you have some great tools , soooo great to watch!!!!

Hard to believe...but this might be your most insane project yet! 😁👍

if it's that fast with a drill, then it's going to be insane with the real engine in it. Can't wait.

Ethan, you are an absolute savage of a fabricator! Love watching your creativity come to life!!

what you need is a pipe anvil. find 3'-4' sections of heavy wall, steel tube, 6", 4", 2" in dia. at the scrapyard, weld them horizontally into a strong frame at the ends, parallel to each other, with about a 1/4" of space between them with the largest one in the center, weld some legs that you can bolt to the floor onto the frame holding the tubes, and presto! you can make smooth curves in sheet stock easy peasy, lemon squeezy. just insert the sheet between two of the tubes, and bend it around the dia. tube you desire like a brake. they're really useful for making body panels, drive shaft tunnels and the like. and being d.i.y., you can save a few hundy for project fundage. there are a couple of how to vids here on the youtubes that will give you an idea of what they look like, and just what they are capable of doing. honestly, i can't believe you don't already have one with all of the fab work that you do.

Keep up the amazing work guys!

I have a feeling you are going to have issues with pump cavitation when you have the motor turning it. In my experience that cavity in the top of the pump will hold a pocket of air and the smaller size of the intake might limit the waterfowl into the pump causing the impeller to spin freely in that pocket of air

That is some dandy Aluminum welding, Ethan! I've been welding for over 40 years and you impress me with your skill and technical savvy!

31 is not that old. Love seeing the beautiful woods and love seeing all the little toy and projects makes me wanna start building crazy project like these. Love the content keep it up guys.

There's already mini jet boats. I think calling it the Micro jet would be more suited to its actual size!

Completely impractical, too small and super dangerous.. I've come to expect nothing less from Grind Hard. Love it!

I work up on Schweitzer Mountain. Every day I hope to see you kids up there playing with some awesomely odd contraption that enthralls me so much. So cool to see you grow and prosper. You all deserve it for the hard work put in. (Long time subscriber.)

Yo!!! Your welding and fabrication skills are 10/10! Seriously impressive work

Once again, our "Boy Genius" validates the saying "We have done so much for so long with so little that we can now do practically anything with nothing". Can't wait for the next vid of this watercraft doing a full on send with a combustion engine!!! 🤣🤣🤣 Great stuff GHPC!!!!!!

We put so much love into this video! What do you think? Enter the giveaway here www.grindhardplumbingco.com

A long travel offroad trailer would be sick! Can't wait to see the finished product. Keep up the good work guys!

It’s amazing watching your ideas come to life.

Because it's so small maybe a neoprene seal skirt, like whats used on whitewater kayaks would be good. I have no idea how you would do it, but I just think a lot of water could enter the boat from spray and waves, idk just a thought. Keep it up boys, loving the longer content 🔥👍

I've always joked that any tool when used precisely is a precision tool but Grind Hard makes it less of a joke and more of an ethos

The day I stumbled on this channel watching you guys build the Barbie Jeep never thought the day would come for a mini jet boat you guys really have no limits and I love it.

You guys cant even imagine how much i had fun by watching this. I just imagine that im on the boat with engines on ! SICK!!!

I’m guessing the inside radius part of the intake might cause cavitation. The PWC’s have a gradual slope up to the back of the transom. I could be wrong with the cavitation and would work just fine. 🤷🏼‍♂️

I feel like that water intake might be too restrictive to flow efficiently at 100hp. If it ends up cavitating badly I’d bet that’s the issue.

You guys in the boat with a drill was hilarious! Great stuff! Thanks for sharing!

Thing rips for just a drill. Nice fabrication to, definitely going to be following u guys.

Love the quality in this video! Music was awesome, and that boat is hilarious!

I think your fabrication skills are amazing!

Some seriously impressive fabrication, blown away watching you design and build every portion. Will be paying attention to more of this can't wait, keep up the good work guys.

You put so much love into this video.. .but I'm willing to bet a large sum of money that I loved this video more !!! Firstly the tiny hull is a buitiful peice of fabrication. But when you add the masterful design and fabrication that I witnessed just now.. this is really going to be the most talked about , watched , And desirable part of the collection. This is really exciting and epic !!! Guys this mini combination is so so very desirable already!!! I know in my mind's eye that this is going to be a viral situation once completed. I'm in oar with your genius and I'm sure you have the same effect on others.. good stuff !!!!! ,🤪👍

Way cool! Surprised how the drill moved the boat with that much weight in it! Great craftsmanship!

That was great and made my day! I laughed, laughed, and laughed when you had it in the water.

From a guy that built his own Jetstream , GOOD JOB on the intake ! I am impressed af!

I wish I had 1/10th of your fabrication skills. Just flat impressive!

I just noticed the Subaru head bolt T-handle wrench for the lathe…..LOVE IT!

This was both inspirational and so much fun to watch at the same time. You've earned a new subscription 👏

just love ur show i learn from u all .even though i am mechanically in klined myself .some people get happy over foid or walking or whatever ,ME happy when i cutting metal or welding something from nothing just love making things come alive ,peace out u all keep the great builds coming .🙃

Just started to watch your channel and I love your ingenuity and just all around shop skills. I hope to keep watching.👍👍

That thing is gonna fly! Keep up the awesome content!!

Dude soo dang talented! I’m blown away by what you guys can do

Promising test with that drill, I have a feeling that thing is going to be a neck breaker! Nice fab work,

That is going to be scary fun. Love it

Just subscribed when I watched you decide to go the extra mile and use the 18 volt drill !!! That's the kind of guys I want to see in videos!

It’s always a good video watching this guy work.

You guys are awesome. Can't wait to see it really go🚣

Kudos guys. Really clean design and execution.

Honestly super pumped for this build. it's going to be wild 😁🚤

I have to say that one of my favorite unspoken mottos of this channel is I.A.O. (improvise. Adapt. Overcome. No metal roller? No problem

Really enjoying the jet boat build!

That one amazing piece of fabrication. That 18v drive cracked me up, so funny!

The life vest only, gave me a "Deliverance" vibe. I'm glad no one said, "squeal like a pig!" That boat is going to be stupid fast with 100 ponies. Am loving the build!

Very nice job guys !! It's an awosome project again !! Congrats 😍😍😍😉

Absolutely super fun machine =) The 18v drilling machine brings great power ✍️👍

such a sick build!!!!! cant wait till its done

this video made me so happy lol. cant wait to seer that thing with 85hp its gonna be nuts

Man you are such a smart young man I wish I would have had a friend like you to show me how to weld and make things

I love this little boat! Going to be so much fun to rip it!

Can’t wait to see this done most anticipated toy of the summer

these guys are just casually expert machinists. so cool to watch👍🏼

I'm so excited to see how well that 18 volt did on that jet.

Wow , amazing out of what you have , out of some amazing tools , love your work mate

I just am smiling the whole time i watch your guys videos, i don't realize it til i'm done and my face hurts.

That table is awesome! I used 1.5" square tube and it's been tested @ 3tons capacity.

Fellas, that is awesome. Keep up the fun work.

Especially with the amount of projects goin on!

You get it running right it's going to be your sickest build

Wow Ethan and crew you guys don't mess around when you start a project. If the wedding torch didn't break you would've finished! Can't wait to see the end product 💪👍

My favourite project of yours hasn't started yet . The awesome new shop in which you will build epic things .

Man that reminds me of my grandpa's boats he used to build! Very cool

I cant wait till this boat is finished

What an awesome channel. Seems like I’ve been watching it for years.. wait, I have been watching it for years! The propulsion that 18V drill was providing was quite impressive. This is going to be so cool. Don’t know why and maybe I’m wrong about this but that window frame worries me when you guys eventually are at speed. Ahh, it’s probably nothing though. OK boys keep up the good work you’re all killing it!

When you're testing in the pond. All I hear is "ruba dub dub. two men in a jet boat". Lol. Awesome build guys!!!

Awesome video. Might require a bit more R&D into that pump housing, but i'm no professional. Super glad you guys started this build.

That's insane nice work guys

I’m so ready to see this unit in action

Fantastic work gentlemen 🤘

Heck get a bigger drill ? Lol good way to see if the boat floats nice touch guys . Keep up the great work