Next time when bending or molding HMW plastics, use HEAT! You can basically mold the entire sheet to fit the hull bottom. Boiling water is great for bending and molding it because of heat distribution, but also a rosebud torch, applied sparingly, and other heating methods can be used. Also, consider cyanocrylate/powder welding for joining pieces together. You will come up with a more robust design altogether.

Probably the only time I've ever sat here thinking 'Man... Ethan should PROBABLY have a helmet for that creek..." And I'm not a safety anxious person in the slightest lol

Can you imagine how effective this sort of boat would be for Search and Rescue operations? Specifically for the searching part. It would be so easy to put it in the bed of a pickup or on a tiny off-road trailer and get it to remove streams with ease.

Not sure if Josh is just hangin for a few. But man, that’s one piece of the puzzle I had no idea you needed. Formidable team

For marking black uhmw, silver sharpies, or white paint pens are your best bet. Also for filling seams and gouges, you can take a small scrap, like a 1/4" wide strip, light the end on fire, and drip it like a candle. Definitely not good to breath in, but that at home plastic base welding.

Honestly didn't expect another jet boat video, but I'm here for it!! YEEEWWWWWWW!!!! Happy Friday boys!

Thank you guys for the mini jet content. Its the reason I found and follow your channel. More please

An old fiberglass boat trick. Use the counter sink bit in reverse on the drill so you don’t accidentally counter sink too much.

I love how you put an ATV muffler in the boat and it became an ATB. All terrain boating is crazy lol

Y'all never cease to amaze me on the builds that you do. Not to mention the silly shenanigans. 😂👍

That would be a great sport, almost like rally racing, timed run up a streak of shallow river or creek, jumping over sandbars, hopping out as fast as you can to push your boat off of obstacles. Great event to attend, good spectator sport as well, not too expensive as well so low cost of entry.

As a 3rd shifter thank you guys for making videos longer. Love watching you guys regardless 45 mins of premium content

your channel has grown so fast. this is amazing because it allows yall to keep on building such amazing machines. Thank you for all the great content. Stay blessed.

It’s so good to see someone with impeccable skills in mechanical engineering and over all excellent fabrication skills

Nice! Fun day on the water with gorgeous scenery all around. That first part with you hiking through the brush along the river in your vest, had a solid Burt Reynold 'Deliverance' theme to it. Was waiting for the banjo music to start up. Good content as always.

You guys are an inspiration. The first 30 minutes was great, it showed how you can upgrade your boat without 30k+ of machine tools.

Always a good day when the mini jet boat gets time on the water. 💯

Sick as always! Let's see a full nighttime run!

Always love the build montages ❤

I love that Josh made it out to the property! Sure hope you showed him the treehouse and everything!

Now you guys need to make another similar boat, as it waaaaay more than doubles the fun! ❤❤❤

I can see a need for a little foldable oar mounted on the engine cover :)

You all are living the dream!! Love watching the projects and I hope it never ends😁

Next time use your drone pilot to help you chart the river - with the right contrast and polarizing filter you'll be able to see everything, just cruise 10 feet above the water (make sure to scout your fishing holes this way too, you should be able to see any fish/lost beers).

That plastic welds very well. You can take a thin scrap and use it like a welding fill rod with light torch work.

Love the jet boat videos, always looks like a ton of fun.

The video I've been waiting for since this build started. That looks like so much fun!!

You may have been able to warm the plastic with a rosebud torch and get it to drape over the hull better. Just a thought.

As much as I enjoy watching you guys build something I even more enjoy seeing you have fun playing with your awesome toys and yes, it also makes me a bit jealous. 👍

I could only imagine how much it hurt to hit those rocks in that tiny boat

There needs to be a Cleetus collab with this crew!

I just learned of you guys last night while watching an interview with Derek Bierri from VGG and I have to tell you I am SO glad I did! The projects you guys take on are really impressive and while I'm working my way through your channel I have to say, this jet boat project is TOP NOTCH. The fabricator (Ethan?) is the real deal and I love how creative he is at figuring out problems. I also love that y'all show your errors as well. Keep up the fantastic work as your skill sets will only improve! Thank you for the entertainment!

Nice to see Sam is doing well. That looks like a blast! Much ❤ Love 🌎🌍🌏⚡️☯️

You guys are always doing something insane and I love it 😂😂 1:36

WHOO! That new muffler makes that thing sound PREMIUM.

When you were going up stream over those rocks, I had a grin on my face the whole time. Completely badass! Too bad it ended short but it was probably getting too shallow anyway.

Is there a reason you couldn't heat and bend the plastic to "mold" it to the bottom of the boat rather than cut and bend? I think the size of the piece would make it tricky but not impossible. Either way, looks great!

Not one use of the word premium!!! That makes me so happy!!!

GRIND HARD .... building the best things you never knew you needed!! Just awesome guys! Cant wait to see the new shop up & running!👍 much love from the U.K 🇬🇧👍❤

I love all the mini builds, theyre the whole reason i subscribed ❤

imagine being a fisherman and going all the way up a secluded creek to escape the boats disturbing the fish and this mf just flies by 🤣

Tip for you guys. You can use the counter sink tool on plastic with a power drill but the trick is to put it in reverse and let it melt slowly while it heats up

You guys are very enjoyable to watch. Very respectful bunch of fellas which means you have good percents. Stay safe

Awesome guys! Your channel is never short of any entertainment! Dead battery! Quick to the Jackery! Thanks for sharing.

Powder coat paint the jet boats than a rap doesn’t come off anymore

30:58 if you want to skip over the building phase and want to see it in action

you need to build another small boat (a 2 seater would be nice) for filming and rescue missions like these

Life has been kicking mine lately. Smiled a mile wide when I saw that you had a new upload. Thanks :)

Granky guy here. If you are not going to wear a helmet, why wear the life vest. Love your chanel. Just want you nummies to stat safe.

First 30 mins ⬇️

Drone footage is just dope guys

Maybe you guys should mount a little flip cage behind the seat? So that it wouldn’t be fatal to flip over some rocks and land on the side/upside down?

Make some for Cleetus and his boats!!! We need the cleetus Grind hard Collab

I absolutely love this project!

Always a good day when Grind Hard posts!

So sick! What a ride it is. Outstanding!

Used to run the rivers in Western WA Steelhead and Salmon fishing when I was younger. My buddy and I built a 20' sled from scratch (built the trailer also). One evening while shooting back up the Snoqualmie River in the dark my buddy made a wrong turn and we ended up in a small portion of the river that cut across a big sweeping bend in the river. I was facing backwards, saw his eyes get big for a second and then he floored it. I looked to my left and right and saw riverbank on both sides, just a few feet from the boat. Turned around to see maybe a 10-12' wide trickle in front of us that was maybe 6-8" deep with a small waterfall over some small rocks at the end where it entered the main channel again. We hit that little waterfall full throttle, jumped the boat back into the main river and kept on trucking! Going 40-60mph up a shallow river in a big boat can be stressful but fun at the same time.

Probably the 1st 360 I've seen, with a BOAT! WELL DONE ETHAN💪

That's the sickest most awesome mini jet boat ever built! But then I wouldn't expect anything less from Grind Hard Plumbing Co.!

Any 18 volt cordless battery can be easily used as a jumper battery, even for small car engines.

Hey I watched this because my boys had it on and wanted to put my 2 cents in. We put polymer on our airboats in south Florida. We lay the sheet on the bottom of the haul when flipped upside down. We leave it there for a couple of really hot days so it takes the shape of haul. Then counter sink our stainless pan head bolts. Hope this helps. Your an excellent fabricator btw. Love that my kids are watching this over cartoons😎

It was great to see Sam back! Great video as always.

Will is my spirit animal.

I am a 15 year old Alaskan kid and watch all your videos and love what you do. I drive 20ft jet boats and drive atvs and 160hp snowmobiles but this little jet boat would be amazing fun and I could take it to so many amazing places in Alaska. It would be so much fun.

Its always an awesome video when Josh randomly pops up 👍👍

Great videos guys and it is always good to see Sam The Mad Man tearing it up !

This dude has some balls of steel!

The new addition to the crew is great!

On the grate, put some kind of separator that is non conductive, otherwise corrosion will be really fast with the different metals contacting. Use to use a clear plastic tape when I built semi trailers

Edwin always expanding the jukebox! I love the Turkish sounding stuff and the 70’s funky vibes

Good old school CAD design heck yeah

i just wanna say i love each n every of yall, im glad 4 yall, the skills and the hard work paying off :)

Awesome job at the add-on. Also, what a great grate. Cheers

Great boat, just a few minor issues! Well it makes a great canoe as well as a boat. Nice to see Sam back on the team.

Can I just say my dog loves watching your videos with me because she hears your dog lol we need more on the dog in an episode lol. Love it

Bottom came out nice man thst is going to be super Slick in the water

make 2 more please of these nice boats, love to see a pack of them running on the lake :D

Love it looks like a hell of a lot of fun you live in such a beautiful area

This brings me so much joy watching large adults jump a tiny boat over a sandbar!!

Great video as always guys

Ah lifetime fun memories, and great content!

Cant wait for yall to somehow convince Cleetus to try n fit in that thing! Haha

Might want to add water tight compartment for booster pack, leads to start it, no leave when battery has issues and build redundancy to bilge pumps etc before leaving for journey like this.. also little more water might be good idea. Rock proof and made to run over rocks are two different things... i'm afraid the damage bottom took from that.

Built yourself a little rock-skipper there bro!

That thing looks like so much damn fun! 👍

Gosh that thing looks like so much fun!!

You guys are so fun to watch.

OUCH!!!!!!!! My back hurts just watching that boulder run, crazy.

That boat is sick! :D

Love the vids guys!!!

Impressive guys, I just love the jet boat, have you thought of tagging along with Cleetus McFarland and his crew when they take thier jet boats out and show them how it is done? Could you imagine seeing a giraffe (Cleetus) in a mini jet boat having fun? Loved the video but for the inclusion of a certain past team member who brings down the tone of the whole video. Keep up the good work guys and looking forward to you finally being in the new shop. Tony from Western Australia 🇦🇺

Imagine just chilling, fly fishing, enjoying the scenery and then this monster rips by ya🤣🤣🤣🤣

Loving the music selections!

Chalk sharpies work great for fabricating dark materials, they mark everything no matter the texture and wipes right off after

Ethan, your engineering always proves itself. From mind to matter. No wasting paper in between. Well, maybe some cut up cereal boxes for templates. You know. 😉

I can't wait to see the Mini Jet Boat lap around the track. :)

Edwin the drone shots are premiummmm!

We use a battery planer to trim the uhmw to size, works really fast and is pretty accurate too! Would be a bit safer than the knife. Love the video, cheers boys

Watching this vid made me realize the utility of a metal hull jetski could be. Your boat but sit on instead of in. What a fun time! Sorry you had to walk it out so far Ethan! Maybe a collapsible paddle? Such a fun toy.

the early 2000's we used rhino liner. It would spray out at over 200 degrees ended up building it quarter inch on jet skis and it was able to put spray it's so thick it came out smooth worked great. Good job. It might have been called Line-X now that I think about it