been playing with these carbs for near 40 yrs . good vid .

Lou and Don - this is a great video - I learned much from it, thanks for presenting it in a very professional and easy to understand format.

Louie and Don, Well done! My boyfriend and I had to get that boggy old Ryobi gas weed trimmer going, and after watching your video, we learned a lot, especially about fuel delivery. It runs fine, as my sore arm will attest, the lawn is done- and now maybe we can figure out the carb problem on the high-wheel weed trimmer.

Excellent vid guys. A ton of information for many 2 cycle carbs. Many thanks!

Great tutorial, detailed yet easy to understand.

This presentation is the best, Repeat best, Explanation and illustration of how a diaphragm carburetor works and is designed. Walbro is a first class company.

From ZAMA carburetor website: Pop-off pressure: "A lot of emphasis has been placed on carburetor pop-off pressures when in reality they are not an important issue to the service professional. In fact checking pop-off pressure can often damage the carburetor by stretching the fuel pump diaphragm and breaking the seal of the fuel pump gasket. Rather than pressurizing the carburetor to pop-off, Zama recommends that the carburetor should be pressurized at the fuel fitting to 10 p.s.i. It should hold this pressure for a minimum of 15 seconds."

Very helpful - thank you for taking the time to make this video - best regards from England!

Thanks very much walbro team very handy step by step showing gasket and Diaphram replacement.

Extremely helpful....thanks for in dept instructions...

This was an excellent video, thank you very much.

Very well done & informative thanks guys!

Great informative lesson...thank you!

awesome . I will watch all your vids. thank you

Great video, I learned a lot from it.

Perfect. Exactly what I'm looking for before buying a Ryobi gas trimmer.

Fantastic information, thank you guys,

Walbro makes excellent small engine Carbs. My 2006 Echo CS 330T has always run perfect, but past few times, it started acting like running out of fuel, Now it will not start. New Walbro carb kit fix is on the way

Congratulations, you've just succeeded in sending me too a foreign manufacturer for anything that runs on gas!

It drives me crazy when people always call the purge bulb a primer on 2 cycle equipment! All it does is confuses people who don’t actually know how these fuel management systems work now days. The (purge bulb/bubble) is not actually a primer bulb as they used to be years ago on equipment. You do still see a lot of 4 cycle equipment with actual primer bulbs that literally squirt fuel into the intake when actuated, however the carburetors in this video and on most of today’s modern 2 cycle equipment is actually a Purge bulb meaning it has 2 lines going to the fuel tank one feeding it, one a return. When you press the bulb it just circulates the fuel though the carburetor ridding any air that might be trapped in the lines or the carb. I used to work on small engines on a mass production level and you would not believe the amount of units I had come in with no start as the complaint and all it would be was the owner operator thought if they actually pushed the bulb more than once or twice they would flood the engine! If you don’t use it the purge bulb the equipment is hard to start. 😂 I wish we could all just stick to calling it a purge bulb and explain the simple fact that it’s not like a carb on a car that you can flood the engine with. You can press the bulb till your pink in the face and it won’t flood anything 😆

wonderful video thank you so much!

I was excited when I saw your 57-11 pressure tester. Then I looked it up and saw the $158.00 price. Wow! But thanks for the informative video. And for everyone out there, as another commenter said- primer bulbs dont prime, they purge. You can press them 100 times and you will not flood the carb. They only purge the carb of air. Cheers.

Great tutorial ❤️❤️ thank you 👍👍👍

Outstanding overview.......

9:14 that metering lever adjustment is a pain in the butt to get it just right. Thanks for posting this video with this info.

Mind the purge bulb cover direction. Note that the sleeve is away from the fuel inlet: 16:23 After disassembling, it is assembled incorrectly: 18:52

Thank you you are both very helpful I wish I this 20 years when I was trying to fix my weed eaters other 2 stroke engines

I've re-built these a few times, it really works. The carbs are damaged by ethanol, even if you use a stabilizer. Note: Only use marine grade Stabil. The red stuff isn't good enough. It's mostly the metering diaphragm that goes bad and causes your engine not to start.

No mention of the purpose of two throats on the WYA carburetor, and the lack of any adjustment screws whatsoever. Excellent video. I attended a training class for Stihl products when I worked for a dealership and your video covers a lot of the same material.

Great Video, I saw where you put a drop of oil on the impulse passage to see the oil move. I would like to put a gauge on the impulse tube to measure the actual pressure and vacuum. What would be the minimum measurements to properly operate the fuel pump diaphragm on a HD 12-1 carburetor. Thank You

Video veramente bello, parlo solo in Italiano o un poco in Francese quindi non capisco le spiegazioni, ma le immagini sono chiarissimo. Professionalità, Serietà, Precisione, Qualità. Congratulazioni, Ottimo!

Molte grazie, dopo vari tentativi di ripristino falliti, ho risolto il problema rimuovendo il tappo gallese e pulendo il piccolo pozzetto sottostante.

Excellent video Thank you

great video, thank you

thanks guys.real good info.

Enjoyed - very informative

Great video...thanks.

I should not be able to draw air in sucking on that check valve correct?

great video.

Great video, excellent

Excellent very very good information Ty for that

which fuel pipe did you inspect first ???

How do you take the plastic pieces off . Where the fuel lines go so I can up grade them

Very helpful, thanks.

Im getting confused did they asked to do 2 compression test on the same carburettor?

Thanks for a great video guys. I do have a concern about the tamper resistant section though. If all the carburetors you guys produce operated at the same air temperature and same elevation above the same mean sea level @ a specific barometric pressure you would not have an H/L adjustment on your product. In my real world it simply ain't so. I have had to make adjustments on the fly just to get through the day on mountain side harvesting. I know what we really need to do is keep congress out of the engineering department. If you don’t believe it just look what happened to our gas cans!!! Thanks Ray n S.C.

How do you properly install the brass seats on some of those carbs

Very informative video. A lot of people mistakenly call the air purge bulb a “primer bulb”. Some older lawn mowers and snow blowers did have an actual primer bulb that forced fuel into the throat of the carb.In this application though it just pulls fuel from the tank, circulates it through the carb,then returns it to the tank to eliminate air from the system to ease starting. Generally, if there is also a choke lever it is an air purge not a primer.

Hi there I thought you did a fantastic job rebuilding a carburetor good job. Although after seeing the saw cut through the wood log I could tell right away double chain was was not very sharp he should have cut through that like butter anyway cool video thanks Dennis

I have a wt141 carb that I would like to replace!I have rebuilt it 3 times and it just will not work properly!is there a cab that will work on this that has same ports in the same places,I can’t make house case changes!

Thanks a lot for this information

My carb is not feeding any gas ? It’s a salvado 700 that I put on my goped, I messed with the hi n low needles but still nothing

my quad walbro carb is only 1turn what's the adjustments sane as this

“Tamper resistant” carburetor? If I buy something, I own it and should be able to adjust as I need/please.

Thank you sir

I have an old craftsman chainsaw with a Walbro WT 20 carb. Is there a video that shows how to tune that carburetor. I'm having trouble getting the saw to idle? Thanks

I have an old Walbro carburetor that says WT 2 M1 1202 I have no idea what carburetor that is.

Thank you brother

hi I am a stihl mec how do you check the check valves in the carbs

Hi i have a brushcuter with a fully plastic carb and nobody has herd of that not from usa canada or uk its by walbro from the 90,s how can i buy a new one please

You are the right person to ask about carburetors. What are the differences between 2 cycle and 4 cycle carburetors? Only differences I see is the spring in 4 cycle carburetor fuel pump side which 2 cycle carburetor doesn't have. Why is there a spring? Now a day, there are no adjustments valves, all factory set. It see to me that the spring in fuel pump side diaphragms causes, flooding in carburetors and wet sparkplugs, difficulty in starting. I have a 26.5cc 4 cycle weedwacker(brand new). I can't get it to start no matter what I tried. I have other 4 cycle lawn equipments with fuel pump diaphragms and spring. They all have bigger engines about 200cc. I don't have any problem with them. Please, let me know! Thanx.

take a dremel with a small cutting wheel and with a steady hand cut some slots for a pocket screwdriver... depending on the location of adjustments you can cut into the carb body with no ill effects...

hello walbro friends I have a walbro wj 71 carburetor I would like some help I am having trouble knowing exactly the height of the needle lever, I cannot find the service manual for this carburetor thanks for the help

Master, can you pour 33: 1 husqvarna ls + into the saw 372xp 357xp and scythe 545rx? Will the piston rings get stuck with carbon?

HEARTY THANKS AGAIN

"Draw the nozzle check valve up against the retainer 2 or 3 times to insure it's working properly." I know what you mean but, most haven't got a clue what all that meant.

Now i undestand more:)!

Most troublefree devices that I've ever come across. Keep your air filter element clean and you're ok. If theres need, you can easily adjust for ideal engine speeds.

Good tips guys thanks

Sir where is carburetor base???

Any updates on using ethanol fuel with a walbro carb (WB37)?

i got a brand new Al-ko 154 with Walbro WT688 and it wont start right out of box. Plug keeps getting wet. Has spark and compression.WTH??? Fuel is good and keeping decompression pushed in while starting. What is going on?

I have a 2cycle generator from Harbor freight with 800 to 900W. Would you have information on setting the timing of the generator I have had a problem on mine, which I believe is the timing. It jerks the starter cable out of my hand when starting. It may be trying to fire be it is supposed to. Thanks! Regards, Robert Fern

I don't have the walbro pressure tester. I do have a mityvac 8500 vacuum/pressure tool. I have pressure tested many walbro carbs and I can NEVER get the results you do. Most of the time the pop off pressure is almost 30 with the reseat pressure is around 15, even when I rebuild and adjust the carburetor. When I reinstall the carb the unit works just fine. Why? am I doing something wrong? Should I do this test dry or with fuel in the carb?

In the video you show a blow-up parts diagram of a walbro carb. Can I get access to a parts diagram for my walbro carb?

mi maquina es OLEO-MAC y cuando la acelero,hace como si quisiera apagarse,y solo en algunos momentos acelera bien,sera esto problema de carburacion,?? y gracias por su tutorial

I know this is old, but most of us here are very apt backyard guys. an actual measure # would greatly help as we can build our own gauge....

Very good information ty

I have a wyj 113a 448. Any videos on it?

Excellent tutorial. You really did a good job. What can i do to help you?

Very well said . How do I find the number of the repair kit for the Walbro butterfly carburetor? (WT-1139 w)

Thank You for the great video and information. I have the problem of a leaf blower from the 90s, The carburetor has large numbers 041, Smaller numbers that looks like w 1538. I cannot find a rebuild kit number for this part number. Can You help me with this problem? Yes, It is a WALBRO. Also it looks like I can't remove the screen without destroying it. Again Thank You.

where's your school

Great video!thank you! Hope you can help me. If i pump my primer bulb air goes out but no fuel comes inside . I already changed all gaskets and diaphrams and screen with walbro rebuild kit and used air compressor in every hole. Should i try to remove the welch plug?? Thank you

good info thank

I have a Walbro WT 471 (non adjustable high speed jet) This Homelite Yard Broom (blower) does not have a throttle trigger but only levers on the choke and throttle butterfly-for two speeds. Question...the high speed jet has a fixed plug in it, sticks out about 1/2" and I cannot turn or seem to do anything with it...what are my options? The engine seems to load up with gas, I did install a new primer bulb, needle, and metering diaphragm. It initially ran excellent but then started to load up with fuel, lose power and bog...spark plug is soaked with gas.

jaki gaznik posiada stilh 011avt symbol

When start my chain saw up. Races up will not go to IDL even if making adjustments on side of carb. Would crankshaft seals have anything to do with it? Thank you and great job.

WT-309-1? Hard to find that one these days.

Good job men I don't see sthil company doing videos like this

I just rebuilt a WT318 that has a plastic plate under the primer bulb that is the return to the tankand now It will not prime. I used kit # K10-WAT, I tried the stiff blue and the flimsy black rubber pump diaphragms, made sure the one way valve under the primer bulb was closing and opening, set the metering needle flush with the body replaced the screen, poked and blew out all of the holes so what am I missing? Is there supposed to be a rubber grommet in the needle seat?

mi carburador le cambié su repuesto y se le hizo limpieza se descalibra q falla es

My engine hv starting problem. Help me out.

gostaria de obter vídeo do wb 32

I like it how they call the high and low idle screws "tamper resistant" like the owner is "tampering" with something they aren't supposed to. If I buy something, it's mine and I can "tamper" with it all I want. It's my property.

like this thanks

I have a Walbro carb in my Comer K80 go kart engine.

This is terrific, what do I use to clean the parts, carb-cleaner, gas, what is recommended ?

The inlet needle, metering lever, pin, and spring. You didn't show how to reassemble these and that's what I need to see. The spring keeps bouncing out.

I can share this video for my channel, More with a Portuguese edition for my clients.