One possible explanation The pump economy jet could have been an easy modification for engines hooked up to generators. They rarely run at idle, so the accelerator pumps aren't really needed, you only need a few drops of extra fuel while starting it. (You also need to change the heat range on the spark plugs ) So I suspect someone used the parts list for a military generator that used the same carburetor and engine unaware that there are slight differences.

And this is why it's vital to understand HOW things work and not just follow the manuals blindly. I overhauled a batch of Solex jeep carbs ten years ago, just moved the dusty box of left overs last weekend. I remember that some of the rebuild kits had incorrect parts in them and I reused some of the old bit to make the carbs function correctly. I'll have a look and see if there are any clues in the box this weekend....

I'm 0:37 in and I'm wondering if you're going to address all the people that complain that they can't get their flat-head powered jeeps over 35mph. I've heard it countless times and had (jeep is now repowered to 225 Dauntless) no issues hitting 60+ on the flats when my jeep was running original engine. Dude! 11:45 _HUGE_ difference! Well fucking done, mate! I just shared this over on "The CJ2A Page" forums. You're a friggin hero, mate!

Super impressive, your work and in-depth research!!!! I have a 1946 CJ2a and run the modern solex carburetor on it and call them $100 throw aways when they run to rough after about a year and buy a new one. I am restoring a 1941 slat grille and love the research and guidance you provide! Keep up the great work. You just found a jeep gold mine, need to get with a machine shop and contact them to make the one way valve and sell them $$$$

Back in the 1990’s I bought what I thought was a 1940’s CJ2 but when I scraped the paint off things, and examined the whole vehicle, turned out to be mostly a 1945 GPW, with Willy’s engine and etc. all the bolts and other Ford parts had the F script on them. Pretty fun and capable off road vehicle.

It looks like the correct one way valve is available carburatori-italia.it/negozio/solex-carburetors-pump-non-return-valve/ I have been sent the French M201 manual for 1964 and it shows the part incorrectly labeled, that means the error is AT LEAST 60 years old and it was not made by the Indians. I cannot believe the error is that old! Did the French Army really drive them like how they were in the video, I just can't believe its true!

I seriously think your in line for a purple heart.Thank you for broadening my feeble knowledge of the sole carburetor. Typo! Thank you officer Matt!

Outstanding Matt. Well done ! Love your enthusiasm and commitment to getting it right ! ✌

Great research/demonstration. I opted for a Carter when I was restoring my 1942 GPW only because I heard bad stories about the Solex. The question now is: does anyone produce the correct one-way valve so that the economy one can be changed out?

Mate, I love this channel. I have a 45 Willy’s I’m trying to fix. All your videos are excellent and keeps me excited during the hard parts of restoration

Excellent sleuthing there sir! My 49 CJ3a has a repro Carter that works great but very glad the Solex crowd is getting some love.

I have an original 1942 Willys GPW with a Bantam trailer. I have owned this amazing vehicle since 1982. We ditched the original Carter in about 1989.....and replaced it with a Stromberg carburettor from an Australian-made 1955 model Holden FJ......and I have never touched it since!!!!!!!!!!!!!!!!. Starts instantly, loads of power, and even excellent fuel economy...........excellent video. Greetings from Australia. Les Griffiths

Yes my solex had the same, have the right part coming in the mail now.. Thank you for work on this issue..

Excellent Matt. Good work. I can hear your excitement in your voice ! Next project ? How-to get the best from the drum brake set up so the GPW actually stops.........please 😊

I had a 1974 Pontiac LeMans, with a bunch of carburetor problems, I rigged up an old Windshield Washer tank and manual squeeze bulb pump (the stock Windshield Washer pump only lasted a couple days with gasoline in it) as a manual "accelerator pump"

absolutely crazy the work you have done!

I don't have one. I'm not interested in getting one. HOWEVER, I loved this video. Fantastic job making an entertaining, well edited video! I'm subbing for future content!

I can confirm the Solex 32 pbic that came on the 46 Willys I just purchased had this stupid jet in place of the one way valve. I gave up on the Solex because the rebuild kit was on back order and the throttle shaft was quite worn. So I bought a new reproduction Carter W-O. Great work finding that!

Got to love this guy’s enthusiasm!

I have a solex on my cj3a and its total junk, soon as I get off work and get home I'm checking this out! Thank you!

Amazing, thank you for your in-depth research, it helped us all

Thanks that was really interesting in Australia you are more likely to see a stromberg carbie if somebody has taken the carter off

I’m jealous of how well your jeep runs and drives. I need to buy a new engine some day

Thanks for being so intelligent and meticulous in finding out the problem. This is a case of Lost In Translation from the French hands to the Indians. The original shop manual of M38 is accurate.

Well done Matt - just shows how things can get muddled - this has happened at odd times with other parts in the old car world, 3.8 E-type brake master cylinder confusion was a modern era problem (people think or thought they were the same cylinder for front and back brakes - nope)

Thank you, Matt. I am going to share this to our local WWII garage guru.

I had a sole 32 p d s I in an older 73 bmw. I cleaned it in carb cleaner overnight. Used a small diaphragm compressor to blow out all the journals. I never could get it to run properly. Thank you officer for your revelation! So it's the claret 2 b valve that should be installed and not a a celebrator. Thank you. Very fastenating! Happy jeering! I think your a genius! Many thanks!

Good video easy to understand and well done!

Very well done. Thanks for the video. This whole problem is why I turned one jeep into a fuel injected engine with electronic ignition running on a 12 volt system. We use that one for WW2 reenacting and need it to be reliable.

Great research truly valuable information, and your jeep really does look amazing, miss mine when I see your videos 😢 keep em coming 👍

Good job and video as always. My Carter yf can have some common problems that drove me nuts but over time I've learned a lot. Your issue here was it was crippled from the start. This probably drove you crazy. Great job to figure it out

My family had an MB in the 60s and 70s. Mom gave a shoe box with some tools told me to go fix something. The only thing around was the jeep. Over the next months i took the W-0 carb apart so many times that when dad went to drive the jeep it leaked from every passage. I whipped the carb off in a minute to dads amazement and he took me to the jeep parts store. He set the carb on the counter and said my son fixed this can we buy another. The counter guys looked at the carb. Then down a 9 year old me. Dad told me that this carb does not need fixing ever. Took me 40 years to realize that he took me with him so he did not get blamed for destroying the carb. Oh the fun i had in that jeep. The city of los angeles used to plow the weeds in vacant lots. The lot next door was so much fun running the jeep over the clods to smooth them out. The jeep got restored to military spec expect for the shovel notch that i had covered with a panel . I still see it in veterans day parades in los angeles. Huge hint. Neodymium magnets with holes in the middle. A piece of copper wire looped thru the hole. Dropped inside the fuel tank. Make sure its away from the float arm. I have stuck the arm to the bottom before. The neodymium magnet attracts all the super fine rust particles to it. Keeps them out of the fuel pump check valves and needle and seat in the carb. This prevents vapor lock where the pump check valves leak and the engine heat causes the reduced pressure fuel to boil. The expanding vapor pushes the liquid fuel all the way back to the tank. I also install 10 micron fuel filters just before the fuel pump inlet. 30 to 70 micron filters won't stop the super fine sediment. Fuel injected cars get magnets too. The copper wire allows you to hook them to clean them off.

Great update, well done for finding the solution!

I have a 43 and I'm an American and I live in New Jersey and I have the original carburetor Carter and it runs great I don't have any drop offs or anything like that at all

You are a genius. Once again it's like the problem hidden in plain sight.

Excellent research/solution and video Matt, thank you very much sir. 😃👍

Great discovery, thanks for sharing (even if I don't own any jeep)!!!👍👍👍

OMG this has described my 1962 M201 to a tee. THANKYOU. when I take up power there's a Lagg. Feels like it wants to stall until I feather the gas. I will now be getting the one way valve

Great detective work, Matt!

Great work Matt....That would make a huge difference....

I have a solex in my stores I will check this out . Great vid Matt

Well done. Thanks for the education!

I love this so much! What a crazy adventure.

I just got a sweet deal on a 1954 jeep willys m138a1 that is bone stock with all the 24 volt water tight components. The man who owned it bought it from a government auction back in the 80's, but never titled it for the road. He passed away, and his daughter sold it to me. I live in Michigan USA, and the guy used this on his summer property in northern Michigan. The body needs some small patches that i will get from sheet metal off of a 1953 m38 that i traded 800$ worth of stuff i wasn't using in my shop. I bought the parts jeep first, and then a week later i found the m138a1 on the kaiser willys for sale site for 3000, but i got it for much less because no one wanted to drive to mid Michigan to buy it, and she would not sell it without it being seen by the buyer. I was lucky she didn't know what she had. The only thing the guy did, which isn't a problem for me, is he painted the exterior a dark maroon color. The jeep hasn't been run since 2017, but the motor turns freely, and it was stored inside. He stopped driving it when he was in his mid 80's because he could no longer get in and out of it. I paid to have it taken to my house by a flat bed tow service, and the guy said he wished he'd have known about it because he would have bought it. I guess it got a lot of thumbs up on the two hour drive to my house. The tow truck driver asked me to send picture's of it when it's done. It won't be done overnight, because i want it to be right, and that's not cheep as you know. These old military jeeps were built heavy, not like today's vehicle's. I have extra drive train parts from the 53, and those parts are good. I am 53, and have restored a couple classics in the past, but i have always wanted one of these jeeps, but never could find one good enough in my area. I just subbed to your channel, the tube suggested one of your video's. I have watched several of your video's, and like the content. I am probably one of the two woman who watch lol. As a kid i was older than my brother, so i was the free child labor for my dad and grandparents, who taught me how to wrench, and build stuff. I like being busy, and love working on car's. Both my grandpa's were in wwll, one was a medic for 4 year's and was at d-day, and the other was a anti tank artillery sergeant and also did demolitions with the engineer's. My grandpa had a 53 military jeep when i was a kid, but sold it to my uncle before he died, loved going for rides in it. We used to drive a1967 mule around his farm, wasn't real fast, but it went through the woods well enough. Sorry to type so much, but most of my family are gone, and i don't really have anyone to tell about it. Nice jeeps you have, glad these old rigs are being restored. G-d bless.

Your sir are a legend. Somebody buy this man a beer, that’s actually solved another issue not related to the solex.

Not had any issues with my Solex fitted MB , however very interesting video , Thanks muchly

Brilliant mate. Well done. I did think it was going to be click bate, but no not at all. Brilliant work. Well done 👍

Outstanding work!

Similar to the 32PICT on my 68 Beatle. As you say, no pump, no go.

Awesome. Well researched and well done 👏

You are an amazing researcher and problem solver. I appreciate your desire to achieve authentic, not perfect. There is a difference and I doubt any jeep was perfect off the assembly line. I can't find the valve on eBay using the number you gave. Any other clues to obtaining the correct valve?

Solex carburettors were made in India for cars like Ambassador (Morris Oxford) , Premier (Fiat), Mahindra (Jeeps) etc. It was the advent of the Japanese Suzuki cars under the Joint Venture Maruti Suzuki that brought in the Mikuni Carburettors for the first time to India.

Thanks. I now know why the carb on my wife’s Yamaha VSTAR 250 was bogging down it’s accelerator pump was stuffed. I ended up replacing the entire carb with a Chinese carb and it now runs great.

Great video and investigation!!! Sherlock Holmes himself couldn’t do better. Well done !

Love your presentation!!

In the mid '70s you could buy Willys or Ford jeeps army surplus brand new in the parts crates for $100.00. My neighbor had a tidy little business putting them together and selling them for $500.00. He converted all of them to 12V by adding a GM alternator, battery, starter and the needed bulbs. He bought Rochester carbs from the local boneyards for pennies on the dollar and used those. They ran great but eveyone back then wanted the bigger Broncos, Blazers/Jimmys and Ramchargers so they were still a hard sell to the average person. If all that inventory were only around today.........

With your roads and with all those blind intersections, you REALLY NEED a carb that is working properly.

I wonder if this is a similar problem I experienced with the simple Rochester carburetors for my 6 cylinder Chevy Belair. Even after replacing the carburetor with overhauled ones twice I experienced a very similar problem with the accelaretor pump. After replacing it again the problem is now hardly existing.

Similar has happened with the replacement carbs for the Farmall cub tractor

Wonderful content!

Man, that wasn't clickbait at all ! super cool story, you should have put an quick online store selling the one way valve, bam instant super rich ahah !

Thank you for the Vid, maybe this is exactly the issue of the jeep from a buddy

Good catch. I run a Carter but if I encounter a Solex that's a handy bit of info to have.

I like your jeep. I have a two door JL. I Love My Jeep!

I know it is not a sports car paint job, but I would be using fender covers on such a beautiful classic.

6:44 the lady at the back thinks the allied have landed again.....

Thank you sir. My 1944 Willys MB thanks you as well.

Thank you for this great information. Were in the uk could i get one of the correct type to fit, Have you got any good suppliers or website to go too . so we all can have a jeep running as they show be . Thank you and keep this great information coming 👍

Yaahh … same here. Not the correct valve so I have ordered the correct from the Italian carb-site. My Solex is a brand new bought from Jeep Sudest.

Just swap it out for a Stromberg 97. That terminology was changed for a specific reason & the physical part was changed also (economy jet). Why is the ? & who's behind it? Great video.

Nice catch !

Zip that jacket up , soldier.

Hi yes I have a economy jet on my French army jeep and a solex Indian made carburettor with solex cast in the top cover where to get the one way valve thanks colin

Excellent sleuthing on your part!

Great video

The massive issue with jeeps is everyone says theirs is a barn find found in France and was at d day 😂

they charge just a few pounds , Pa Blanchard& co , ask for a non return pump jet for solex 32 pbi - 2 lb56 carburettor , replace your economy jet with the non return valve , you can do it in seconds no need to take off the carburettor , its located directly under the eccelerator diaphram, 12mm ring spanner fits it

The Solex for the early land rover has the correct valve.

I rebuilt my 32 PBIC a few years ago, pretty sure it has the economy jet. I’ll have to check. Where do we get a one way valve if we need one?

😊 Great video 🙂

Volvo boat engines used solex carbs hp rating change by how many carbs the engine had sometimes synchronizing the carbs could be a pain if you didn't know what you was dodoing

There old style on a old style side valve with modern type fuel .I went turbo diesel for using everyday no worries

My dad had a dodge aspen and he got the carb rebuilt twice before i took it apart the third time it failed and found the accelerator pump piston seal had flipped over bucause of swelling from the alcohol in the gas. It was a long time ago and i think i found a piston with a leather seal which aolved the problem.

Nice!! Very interesting But to be onnest, i keep it to my Carter carb 😉

Super interesting!

I say we blame the French! :)

I took 12 carbs apart and out of 12 found one with the non return valve, I have photographed it and sent the pictures to the carb kit suppliers , I cant send a picture on this feed sadly

Nice channel! When are you uploading new videos?

Thanks mate!!!

Amazing work…

OK Matt, just took mine apart . It's an old one BUT I guess was rebuilt with the. economy jet . it ran ok , but never like the Carter . I also have a Solex for the F head and same thing (economy jet) NOW that we know the problem , where do we get the right part ? Does it list a Solex number for the one way valve in any of the early paperwork ? Thanks

Good info.....

I'm happy sir! :)

I have the 110 purchased it in 2016 went back to a carter

brilliant video

Does anyone know the exact length of a jeep, without the bumpers and spare wheel attachment? basically the tub + the hood

Do you think that since there are many Solex carburetors you could get a check valve from another model and it'd work? I found one for a Porsche, but have no clue if it'd fit, be the right size orifice or if it'd have the same thread. Great video thank you for sharing!

I think it was a simple translation issue. A German word says: "Viele Köche verderben den Brei"

So Matt, where can we buy the correct ball valve jet? I need to replace the 110 in my French Army Willys Jeep.

Had a new solex on my m38 i hated it, rebuilt a wo and problem gone, this might be what was wrong with it, maybe I'll try it on the gpw...