How to Make a 200m Dive Watch for $25
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- Опубліковано 26 вер 2024
- @JakeSea modifies a Casio F91 into a DIY dive watch and sends it 200m down to the bottom of the ocean to see if it can rival the most expensive scuba watches.
Directed and Edited by: Brett Hoffman
Featuring @JakeSea
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Marine Outfitters Since 1938
I love this video no 20 minute vlog bs just 100% quality content
And informative.
Yes, i thought the same.
Somehow, casio really understated their products, it's a lot more robust than they claimed
It is better to underrate than overrate.
@@betulaobscura Not according to Chinese watch manufacturers. LOL
Typical Japanese company philosophy. Never over promise, but always over deliver.
humble at its finest
pretty sure its to avoid lawsuits
funny thing is, most guys who wear diving watches have never dive :(
true!!!
Very true I wear a g shock and it's never been in deep water 😅
@@michaelpeacock9420 mine doesnt even go in the shower.
@@michaelpeacock9420 i wear the king of g-shocks and i don't even wash my hands!!!lol.
Depends on what kinda diving😂
Casio proving once again they basically made the perfect functional watch.
0:28 "Watches that do more than keep time. They keep you ahead of your time" Popular in the 80s, 90s, 00s, 10s, 20s, 30s. TRUTH.
The oil filled watch will take a lot more pressure than 20 bar. Another benefit with this method is that you should be able to operate the buttons under water, without water finding it's way into the watch, something you are not supposed to do, even with the most expensive dive watches.
I do believe it's a good idea to use silicone based oli instead of mineral oil, though, since mineral oils might have small amounts of corrosive components in them, that might harm the watch over time. I also believe mineral oil will yellow over time faster than silicon oil, but not 100% sure about that.
Thanks for your comment. That answers my question about if the buttons can be pressed while submerged. Good to know about silicone oil, not sure how readily available that is where I live.
@adsagp Silicone oil is a common item. Just google it, and you can find out where to pick some up or order online. It is more expensive than mineral oil, however. Getting a sufficient amount to perform the process in the video will probably negate the benefit. I suppose you could simply remove the caseback and just fill the watch directly from the bottle. That may work.
Also better angle of view on the screen
This mod will get you a very small dive watch, the downside is a messy battery change.
Once you add silicone oil price you could just get a Casio with a 200m rating like a DW291, so mineral oil makes sense given the price of the watch. If 100m/10bar is enough you have a choice of plenty of watches (w800h, AE1500, AE1200) in the low $20 (US) range, which will withstand recreational scuba diving without needing a mod.
Of course, if you really go scuba diving and need to time decompression stops use certified equipment, not a $15 watch filled with baby oil.
Wrong! Use only M3 Fluorent FC40 oil.
Don't yellow and don't eat your components inside the watch
My f91w is my go-to watch for surfing for years now and it has never let me down, even when taking 2m waves right in the face it acts like it ain't nothing
any watch that has a waterproof rating will do what you just said. even a el-cheapo will do it no problem. surfing and diving are 2 very different environments. 1 is extreme depth with lots of pressure the other just splashed on the surface...
Taking a wave to the face what has that got to do with the watch....stupid comment
Great to hear thanks for the helpful comment! I’m thinking of giving my groomsmen a f91 w as wedding gifts and a few of us surf so this is great to know!
@omgwtflmaololrotfl2368 Recreational divers bottom out at 40 meters. Not particularly extreme conditions nor excessive depth. I don't have personal experience with this watch, but numerous cheap $20-$30 Casio watches with slightly more WR have survived significant time at depths beyond 40 meters during technical dives. Depths at which 90% of divers will never see. They survive. They work fine. I would hazard a guess that the stated WR on a given Casio watch is at least ballpark accurate.
I've been snorkeling with my stock F91W multiple times in salt water, and never had a problem with water intrusion or corrosion. Those are shallow depths, but I would say that it's more than just "water resistant". (Also I regularly do things like hose off my arms, take showers with it, dip into buckets of water, etc.) This video is a great idea for deeper depths, and it makes total sense. As long as the mineral oil doesn't eat into the plastic casing or gasket over time.
"As long as the mineral oil doesn't eat into the plastic casing or gasket over time."
Or into the electronics. Silicone based oil is a safer choice than mineral oil. It's a bit more expensive, but you don't need much of it.
How the strap holds up? Mine started to crack after about 2 years.
@@thombaz It's about their lifespan it seems, because I just ordered a replacement NATO strap after mine also started to crack after exactly 2 years.
Everyone knows the f91 will survive nuclear fallout
Hi Everyone! Brett and I are very appreciative of all the support on this video. It has been amazing watching it explode in popularity. And while many of you appear to be watch enthusiasts (myself included), those of you here for the boating can still find us on my channel. Brett and I still make content together and would love to see you over there!
We just might drop a few more watches to the bottom 😉
Ive been using this watch for 3 weeks working 5 -6days washing cars and never had a problem best value for quality!
The "depth" rating is actually of equivalent pressure and does not include any increase of local pressure due to currents.
So you tested it to a higher standard than what a watch pressure tester would, it's more like the "300M" rating.
But hydro-modded watches are known to be practically infinitely waterproof, though with a bubble the caseback might dent in.
What went wrong with the stock F91-W is that the inner air compressed so much, that the crystal pressed on the LCD and shattered it's glass.
I've hydro-modded a B640M and a GBX-100 myself, with the latter the oil broke the screen, which I repaired with a new polariser.
Another benefit is better viewing angles, especially under water, where the crystal doesn't turn in to a mirror beyond a certain angle.
It is tricky to avoid a bubble from forming in the plastic housing of the module, which might get out over time.
And depending on the used oil it might turn yellow or cause the gaskets to swell, the latter also happened to my GBX-100.
Even still, stock F91-W are known to survive being used on actual dives, as Casio greatly understates their water ratings.
Also, you commented on dive-watches being too expensive, but only mentioned Omega in the end.
Perhaps the cheaper Vostok Amphibia divers, or Chinese imported ones would be interesting too.
Just One More Watch recently showed a 1000M rated diver, though it's gaskets were smaller than a Vostok's and the F91-W's.
"But hydro-modded watches are known to be practically infinitely waterproof"
That's not quite true - there are many little devils in the details when you get into the technical nitty-gritties. Even SINN watches, the best known hydro-watches, are only rated at 5,000M for the (Ronda quartz) movement and 12,000M for the case.
For movements such as the F91-W, the display will eventually crack under pressure whereas quartz movements without digital displays might survive deeper, but its hermetically sealed crystal and its thin circuit board might become the weakest links thereby limiting its dive depth. Also keep in mind that ocean depths below 200M is at about 4°C where oil viscosity becomes an important consideration for ticking hands.
Filling an F91W with baby oil might be good enough for rock-n'-roll suiting the needs of most people, but getting down the deepest ocean depths is a whole different technical and scientific challenge that becomes much more involved than a 5 minute UA-cam video.
@@MichaelAChang which is exactly what I meant with *practically*.
As a general user who would wear a watch, even professionally diving, you would not exceed what the hydro-modded watch can take.
Of course, in situations you can not enter yourself, this can be exceeded and cause the watch to break, in the ways you described.
And it speaks for itself that in such a professional setting you should not depend on an uncertified modding project, at most using it as an additional backup to see how long it holds up.
Don’t talk about the Russian “VOSTOK”, this is completely shit, not a watch, and the staff of their factory supports the terror perpetrated by Putler in Ukraine.
@@MichaelAChang No one dives to 5,000 meters, unless inside a mini u-boat. Also, the SINN watches will take a lot more than what they are rated for.
Firstly, there's no such thing as a waterproof watch, only water resistant watches to varying depths, depending on their quality.
An interesting experiment though and I'm not saying filling with oil wouldn't work.
Two points though. As far as I'm aware, ordinary oil CAN be compressed and this is why we use hydraulic oil in machinery and brake fluid in vehicle braking systems.
Brake fluid is chosen over ordinary engine oil 0:04 specifically because it cannot be compressed.
Secondly, when a watch button is pressed for whatever reason, it's inevitable that oil will leak and air will enter the watch, affecting its water resistance.
Thirdly, how does the oil react with the electronics within the watch ?.
Very nice. Bell & Ross used this same science to create the hydro max, which is water resistant to 11,000 meters, but costs around $2500
Love my green F91W, it’s my landscaping watch, and I nicknamed it the Master Chief watch.
That's actually genius
It can be used anyway for diving.
It is mind blowing....
Poor Casio on the left sacrificed for science. 😔
Instant sub. This is the type of watch content I've been waiting for.
My f91w is worn daily in the sea, pool, shower, ecc. after 3 years still perfect…
I think this shows that the buttons are well sealed. If the non-oil watch buttons didnt seal, water would have seeped in to equalize the pressure, and the glass might not have broken. Of course, the electronics might have failed eventually in the salt water but its worth testing a pressure- equalized watch.
If you press the buttons of the modded one, will the mineral oil seep out?
Nope it won't, there is a rubber gasket around the button
@anhtuannguyen16799 but oil can not be compressed. Therefore, the button can not be pressed, or if it can be pressed oil should flow outside.
Well, the rubber can be compressed. Maybe enough to permit the button to work. I do not know for sure.
It wont leak… i did hydromod to all my kids casio. It is really fun, and work fine so far.
@@REVIEW_JUJURbisa bang??
@@REVIEW_JUJUR but does the alarm work ?
Excellent demo. And with the humble F91W too. Great job.
The magical part is that for 10 bucks I’ve been pushing it to the limit with no fear and it’s always responded perfectly. If anything went wrong (for two years it hasn’t) you can learn the lesson and get another one
Had two f-91ws that I would swim laps in a pool in. They never so much as even leaked. I would dive to the bottom, around 10 feet, and I wouldn’t even get any condensation on the display. Later replaced it with a databank and accidentally went swimming in it. Display fogged up bad but still worked.
My issue is what are the long term effects of mineral oil on the internal components, and insulated coating on the pcb.
It's not conductive, people used to build fully submerged PCs
The only downside is that you need to repeat the process once you need to replace the battery.😅
once every 7 years... I dont' mind
@@martin.tanubrata same!
Hey thank you for your video this is awesome I've been working around boats for a little while now and everybody tells me to get a watch that's at least 200 m water resistance but I don't really have the money for it and now I have solution to my problem thank you
casio duro, casio dw291hx are great 200m affordable options for you.
Now the remaining piece of the puzzle that will probably destroy all dive computers is adding a depth gauge to this bad boy ..
You could start with a Casio w59 which is about the same price but has better water resistance by default and mod that.
Thanks mate that’s a great idea! I'd buy one but I need a mineral glass face, not resin glass because of my job the resin will scratch and get chipped in no time, but if I find a watch that has a mineral glass face and no real warer resistance Ill definitely have to try this!
Lowkey clever as hell
man my fw91 can handle 30 meters...without oil and stuff
In theory this should be possible with copies of casio right? I stumbled upon a brand called Skmei and wanna try this out for our next freediving sesh. It doesn't go as deep as the video for sure but it looks fun trying out.
A bit messy and unnecessary when you can usually get the Casio AE-2100W for half its listed price, at about 30 quid (i.e. probably $30 in the more favourable US market). That’s 200m water resistant and has a nice stainless steel front piece, mineral glass, a ten year battery and all the bells and whistles of the Royal, but with nicer looks.
Casio are very reliable watches , my father like the Casio , he have plenty of them from the ealy 80's to today , for every day , they all works.
Part of them , on their original Battery .
🧢🧢🧢
@@dieselgoinhammy casio works for 14 years on the factory battery.. all functions working
Interesting video! Just a note: the unmodified watch IMPLODED, not exploded.
omg, my family only wears casio. no money can give the satisfaction and trust like casio does at a fraction.
Just how cool is that! Thanks for sharing!
"fluids are virtually incompressible, but the inside of our watch is filled with air." Not to be a nerd but air is a fluid
yop, right word is "liquid"
True, but pedantic
@@notreallydaedalus also true
True, he should have said liquids are incompressible, or air isn’t an incompressible fluid.
@@latticepoint5245 He also should have said 'imploded'. But I'll get over it.
when any button was pressed oil will leak out and the space will fill with air or the button will not press back.
its one time modernization, not for conctant use, i think
Interesting the standard one completely exploded at exactly 200m❤
It would be great to do the same with a g shock to see how far past it’s 200M limit
Mineral oil eat plastics, you have to use silicon oil.
from time to time i wore a DB-56W telememo(50m water resistance lol) while in the military .
special forces paratrooper.year 1996
1 day i forgot to put on my G-shock and was stuck with the DB .
that day we had a HALO jump which was followed by a sea landing/diving and then swim 300m to the shore .
when i was in the plane i thought ''that is the end of the watch''
the watch is still in my possession and working 100%
crazy 🤪 🤪
Actually you can surf or even snorkel in it out of the box. But good idea with the mod. :)
Didn't know Matthew Stafford did youtube G Shock vids. Must be a slow NFL off-season
Just buy a Timex Ironman problem solved. I have dove with a Timex for years in water from Michigan to Grand Cayman. Never flooded ! And way easier to set and use than the Casio.
Won't the internal components get spoiled with the oil??
No the oil doesn't react with the metals or plastic
@@RobertQuinn-w3n Not react, but it gets wet
Question #1. If mineral oil is not a conductor, what happens to the contacts from the battery to the contacts to the watch?
Question #2. Oil is more viscous than air. In the case of classic watches. Will the viscosity of the oil affect the rotation of the needles and gears? What about the battery life?
1. There is still a metal-metal connection
2. This will 10000% destroy a mechanical watch. It will have a serious affect on the battery life of a quartz analog watch (ie with hands).
Now this is real science!
Anyone mentioning that badass gopro holding on those 200M???
Very impressive demonstrations...can try also with other siblings W59, F84W, and F105W
The complete diving equipment cost a couple of thousands dollar. In case you do not have the 75$ for a G-Shock which you can trust your life under water, then please do not go diving.
Are buttons still functional ar they will leak oil when pressed?
It was just a casual hydro mod video all until the boat scene, then I knew that things are getting serious!
Really great vid, thanks!
Freakin Google i just told my friend about this watch and 1 hr later this video appears on my list
That's insane. I'm guessing you can only do that with digital watches though? Because mineral water would interfere with the movement of any analog quartz or mechanical movements
damm this channel is underrated
Heck why would somebody go 200m deep. That's pressure of 20 atmospheres.
nice 😊 tips! thank you!
200M the watches still workin, but Im die 😅,
wow that was awesome dude :D
This should work with any casio, right?
Any digital watch. Probably not for watches with movement.
What if you pushing the buttons? Where the oil goes?
It would be great to have a follow up on how long the mod watch lasted with the oil in it
Underrated part of this video was that the stock performed up to its specified limit or at least just before it.
Non-professionals will not be going anywhere near deep which just goes to show how much of water resistance fears are just paranoia.
more oil is needed. A 110 liter bath will do.
stupid question but once you've done this mod is there a chance of oil leaks once you start using the buttons?
Ok that was a neat experiment
Yes it was really swell too
I need to try this!!!! Thanks for sharing this
Or just add another 25 bucks and get the 200m resistant model
Liquid moding really helps to many watches and also helps better magnification with diver watches with regular flat glass it creates dome style magnification effects too. Great video with lot of efforts to show test section.Thank you.I watched it even though I knew what the results will be. 😎👍 keep the good work us much as possbile
Genius!!!💡
Loved the video! was looking forward for such a explained mod and the test video itself! superb production quality looking forward to more such videos!!!
"dude, why is your wrist so oily"
That's nonsense about the F91W natural water resistance. I took it on multiple deep dives down to 100ft and it held up fine. I also took it into the jungle with me and the only thing that happened was I melted the strap due to too much DEET. They are tough watches.
Amazing video. The first time i see a oil moded f91
Nice, but not a big fan of this mod. So when the battery goes flat, you dispose it?
Can u do it with a new vintage addition ABL100
They have a crappy light tho. If you want a cheap dive watch, do this same mod to an A168.
Wow thank you ! nice video!
How long will the mov't last after being doused in mineral oil? It may be WR to 200M but a movement full of oil is likely to stop working soon.
mineral oil degrade rubber and plastic after being in a contact for a while.
use silicone oil instead.
А звуковой сигнал в часах работает после залитые масла во внутрь?
Casio mrw 200h testing please
Can you compare Seiko and Rolex diver watches in the same way?
Mineral oil can damage your seals! Use silicon lube oil instead. There is O-ring lube-oil that should work very well.
The truth is that , the American’s make this cheap watch famous & popular more than Japanese 😂
It's important to you?
Talibian special,bet they didnt know about this
Obama special too. He wore an f91 and so did Osama
why did he stopped making videos is he on a different platform?
That was a cool video. Now I want one again
i swam miles with the F91 and it didnt bat an eye, strap needs to be textile though as the resin one disintegrated fairly quickly
I just bought one and was wondering if it will survive in swimming pool with 10 ft depth ??
@@bhavishaypoonia Mine did, but I wouldn't push the buttons under water.
But if you wanna play it safe you know what to do now.
Once I also forgot to take my f-105w out of my pants and it survived a trip in the washing machine at 140°F including a spin cycle as well.
I put a Nato strap on all of my 91w and 105w. So comfy.
I wonder if there are any long term effects on the watch internals from being full of oil.
Bro your content is quality content 👌 ❤
can this be done to cheap analog watches that are not branded and not at all water resistant?
Awesome...well explained ...pressing the buttons on the oil filled watch still possible I'm assuming...not enough of the button entering the case that cannot be displaced forcing oil out?
How is this possible, with the buttons.... They are not sealed, why does the oil does not seep out of the whole were the buttons are?
I assume this can be done with most casio watches, too? (Ae1200, specifically)
Just don' press that button to activate the light down there or you might have a problem ;) Also I've heard that the oil can expand and kinda weep if it gets hot out but YMMV.
Yes, that's why it's better to use high-quality silicone oil.
Ok, you filled it with oil. But can you use the button functions? Or, when you can use the button functions, can it still remain leak-proof, for 200m?
This I'm not sure I want to know as well