Walbro Carburetor Service

[@unfundedopportunities7278]

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."

[@frankie7508]

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.

[@Krispy1011]

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.

[@KasunFernando1]

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

[@steadyeddie7453]

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.

[@em4703]

Come one man, you got 5+ search engines at your disposal, use the modern resources at your disposal and buy the right thing for you. Its not like walbro invented a pressure gauge and pump.

[@steadyeddie7453]

@@em4703 Funny! The problem these days is where to find a good tester (or any tool) from other sources that isn't a Chinese knockoff. If you have a good tester that isn't $158.00 you would benefit me and others to share that information. I would do the same.

@@steadyeddie7453 I don't see anything wrong with the Chinese tester. I made it myself at home. I had a balloon for about 8 euros, an old pressure gauge for measuring car tire pressure and old hoses

[@larryncfc]

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

[@jamesdoyle9220]

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.

[@jacquesblaque7728]

Second passage is generally indicative of a "strato"-scavenged engine. One passage for mix of fuel/air, other for air-only. Typically the air-only is controlled by a separate throttle-body feeding into two transfer ports, separate from the carb, with linkage between. Then there are AutoTune carbs, with no adjustment screws for H or L mixture or idle throttle position.

[@chrisstokley7687]

there attempt at make carbs more efficent and they have special feature/ drains fuel back to tank after 2 hrs.. so self storage itself! pros and cons ... they do save on fuel and stay running longer without a clean ! cons .. they get dirty and alot more parts and they seem tempermental as they age / like starts harder and irregular ! they all got safety caps on needles and always takes 2 or 3 different screwdrivers to work on them ! seem too say Fu + chit alot when strips my 20 tooth screwdriver! from china! oh yea....

[@fulviocenati9604]

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!

[@fulviocenati9604]

Correggo la frase, "video chiarissimo", chiarissime le immagini

[@bobmccuewithwalbro7349]

@@fulviocenati9604 - Grazie per le parole molto gentili. Sono felice che il video sia chiaro anche con una differenza di lingua.

[@popswrench2]

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

[@yongminhuh146]

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.

[@kittyhawk9886]

Return it and get a refund!

[@peppe.5452]

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

[@momatomic]

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.

[@ciolacrudy5997]

Hello, I'm from the city of Suceava in ROMANIA, I need to buy 4 pieces of WALBRO carburetor - WALBRO WT846/829 carburetor - WT846-829, how can I get or buy

[@Lulanda93]

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 😆

[@tiggywinkle1000]

Very helpful - thank you for taking the time to write this.

[@jamey90]

That annoying. Just learned something though.

[@rabies1113]

Thanks dude that helped me

[@johnnyfixedit6925]

So what you're explaining is. When you push the purge bulb it pushes fuel through the carb to pass any air into tank and introducing fuel,essentially priming it. Lol

[@steve709061]

It's a primer dude

[@e.h.lipton73]

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

[@packrat76]

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.

[@arrowdriver007]

They didn't say what to do if the check valve malfunctioned.

[@andybecker2693]

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.

[@Rein_Ciarfella]

If you look into the throat of the carb while pumping the bulb and you observe fuel squirting inside then that action is priming the carb. All this talk about "purging" is incorrect in my opinion. The primer bulb has valves which are oriented so one pulls or creates a vacuum FROM the carb and other pumps or pushes unused fuel back fuel into the tank (the return line). Once the air in the system is mostly displaced by fuel then the primer is pulling fuel into the carb. The vacuum created pulls fuel from the tank up into the opposite side of the carb, effectively priming the carb. If you think the primer is just purging air then please explain in detail how that differs from what I've just described. In my opinion the ultimate action of the primer bulb is actually priming the carb, NOT purging air, although purging the air is a prerequisite and first action for pulling fuel into the carb. At any rate, I'll continue to refer to this part as a primer bulb.

[@andybecker2693]

@@Rein_Ciarfella I think we’re talking about 2 different things here. The older Briggs and Stratton engines and some of the Tecumseh 4 cycle engines had a primer. I don’t know of any modern 2 cycles that use a primer bulb. If the machine has a separate choke lever with a bulb it is a purge bulb. If it doesn’t haves a choke system with just a bulb it is a primer.. All a purge bulb does is circulate fuel by pulling it from the tank,through the carb, and back into the tank. You can push it a hundred times and it will not flood the engine. All your doing is circulating fuel. If you have a choke lever with a bulb and it’s squirting fuel your carb is junk.

[@uadcro]

@@andybecker2693 what about the fuel line / primer line they mention? On cheap china rotary carbs the bulb is sometimes separate and you connect one end on the fuel filter and the other to the carb near the H valve (fuel inlet valve?) and the third line comes down in the tank. On this example the fuel filter line is connected under the bulb and the bulb outlet seems to be the fuel return line to the tank. If the two lines are just circulating, one must have a one way only (bulb has a directional valve?) and the other one is used by the vacuum produced by the engine and be the one for the fuel intake. I saw many times fuel filters connected directly to the bulb and here it's the other way around, this and the fact that it seems the bulb is just a recirculation and not a primer got me confused as to where and when connect the fuel/"primer" lines. Maybe you can shed some light on the subject. Thanks.

[@trouts4444]

@@Rein_Ciarfella Thank you for the explination.

[@sunnysacto]

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

[@rayinsouthcarolina8889]

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.

[@langfredag2262]

Great👍

[@mrgrumpy5116]

all this fuss about a strimmer, and the airlines fly 747's day and night all around the world.

[@darthydna9568]

after doing EXTENSIVE research, the only state that law applies in is California; besides that EPA states you just have to adust it in regulation. NO LAW STATING ANYTHING about athorized dealer crap.

[@steadyeddie7453]

And if you want to really fine tune your trimmer/blower/chainsaw engine they need to be tweaked every time you remix a jug of gas/oil. As precise as I try to put exactly 2.6oz of oil in 1 gallon of gas, it's never the same each time. The problem is compounded with carbs with no mixture adjustments. And in the time it took to write this 10 politicians took off in a chartered jet.

[@steadyeddie7453]

@@mrgrumpy5116 I fear the day when they go after NASCAR, the NHRA/IHRA, etc. Or they tax them so heavily that we end up paying $200 for a spectator ticket to a dragrace.

[@franklinkopecky9644]

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...

[@Rein_Ciarfella]

You can easily remove both H and L adjustment screws to cut slots away from the engine. Wrap the threads in painters tape, place in a vice and cut slots much more precisely. :) That said, a splined tool is much easier to use for adjustment as once you've got it on the machine it is aligned with the screw and won't come off or go out of alignment until you remove it.

[@jackagain8346]

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.

[@leosedf]

Benzene in commercial fuel destroys them. Use something like a pre mixed fuel for chainsaws like stihl motomix etc to keep it running forever.

[@tonykimble3848]

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....

[@tiggywinkle1000]

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

[@Donegaldan]

Great tutorial, detailed yet easy to understand.

[@ciolacrudy5997]

Buna ziua sant din orasul Suceava din ROMANIA am nevoie sa cumpar 4 bucati de carburator WALBRO - Carburator WALBRO WT846/829 - WT846-829 cum as putea obtine sau cumpara.

[@abdullaex4119]

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

[@bravestbullfighter]

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

[@arthurmiller8336]

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

[@rumpoh8039]

YOU DONT SAY SUCK ON THE HOSE TO CHECK VALVE OR BLOW ON HOSE OR WHICH DIRECTION IT SHOULD FLOW. AND WE CANNOT OBTAIN CHECK VALVES ANYWAY.

[@johnmott5382]

I have 2 cycle equipment with Walbro and Zama carburetors but the engines either do not start or run erratic. How do I trouble shoot this problem? Do I need to replace the carburetors?

[@willgeorge5644]

I have 4 devices with walbro carbs, and 2 with others. None of them is going properly! I have repaired and overhauled small engine since the 60's when , at school I used to buy scrap lawnmowers , repair and sell them fo pocket money! bought my first motorcycle like that.... I could not get a carb on a MAC brush cutter going, took it to dealers. they took the carb apart and gave it back, saying it needed a new one and also a rubber bug around the fuel pipe entry into the fuel tank, would cost more than a new brush cutter. Crazy! (rubber bung was $90!)

[@paolocamilloni8819]

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

[@bobmccuewithwalbro7349]

You may have damaged the check valve in the carburetor if you used too much compressed air. Provide carburetor model number and I'll see what else could be occurring.

[@paolocamilloni8819]

It's a walbro 668. I know that valve can not be fixed.Can I do anything to it other than compressed air? Carb is 9 years old. Is it better not to leave fuel inside the carb after use to prevent this? Many thanks

[@bobmccuewithwalbro7349]

@@paolocamilloni8819 Check valve part number is 84-615-1. You can remove the part and carefully install a new one.

[@paolocamilloni8819]

the valve is the problem..today I noticed that if I close the hole of the check valve fuel comes inside. It seems impossibile to remove without drilling it..how can i do?thanks

[@micheltom2614]

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

[@joeycottontailakajoeschmo3366]

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?

[@rustynuckles3662]

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?

[@Sensei948]

Friend, the revolutions 13200 max for the saw 372xp oe 2003 are okay?

[@martinsmythe3414]

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

[@darrenpickens7147]

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?

[@thrashercharged]

Are you showing 2 different model carbs in your Butterfly Valve discussions? There's one carb (detailed view at 3:00) you take off the weedeater that has 2 fuel lines (inlet & return) where the 2 ports are metal, one on the carb body and one on the pump cover. You then use this carb to explain the pressure testing with your pressure tester 57-11 from 3:00 to 4:00. Then you cut to another model carb at 4:00 which has only a black plastic barbed inlet and no port on the pump cover and you pressure test it, but you don't say anything about this being a completely different model carb. This is the carb you use to explain all the details of rebuilding from 5:13 to 10:00 and from 11:28 to 12:00. Then at 11:20 you go back to the original 2 line carb and re-install it onto the weedeater. This was confusing to me until I realized you were using 2 different model carbs and weren't rebuilding the carb you took off the weedeater. Am I right about this? Or am I thoroughly confused?

[@finallyretired3843]

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?

[@PopaAlexandru.]

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

[@luiscortes8322]

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

[@romeo34889]

Luis Cortes: adjuste los tornillitos alto y bajo...son para aire y gas...

[@fernrjf]

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

[@Tyler_Hodges]

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

[@anjelicawhite108]

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

[@GideonWinter]

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.

[@romeoramos6650]

I know this is 4 years too late, but I don't understand, why is it they have tamper proof adjustment, and yet they sell carb that has open needle adjustment.

[@bobmccuewithwalbro7349]

Romeo - Walbro must conform to the laws for the markets the product is sold into. If the law requires tamper resistant needles, Walbro supplies a carburetor to meet that requirement. If the government does not require tamper resistant, then Walbro can supply a carburetor without.

[@foreverwood1963]

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

[@davidlis6709]

I forgot. The guy on the left is real old school like a lot of us. He puts the rubber to his mouth and blows (8:20)

[@henrygrey346]

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.

[@christopherlindgren1185]

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

[@keith2415]

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

[@billcoley8520]

A FS 66 STHIL WEED WACKER, PURCHASED BACK IN THE MID 1980S I THINK, WHAT IS THE PROPER PROPER CARBURETOR. ACCORDING TO MY LOCAL JOHN DEERE DEALER IN HENDERSONVILLE TN, COST APPROXIMATELY $95.00. I’ve researched google and for some reason I keep getting conflicting information. I know it doesn’t have a primer but that’s about all I can give as additional information. Thanks for responding in advance

[@dennishess1073]

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

[@johnkosheluk1041]

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

[@hedleylint7622]

I followed these instruction closely. My blower still will only run on primed fuel. Starts then stalls. Will not pull fuel in to run. Any help? WYA 32 carb.

[@ShotOut55]

If it won't pull fuel in and it has a MAIN NOZZLE, then probably the check valve in the MAIN NOZZLE is stuck open. Ask me how I know! A very aggravating problem, rendering the carb pretty useless.

[@dlynnheadley1138]

Too much boost pressure. Check your blow off valve and the Sceinheizer coupler.

[@rajasohail8401]

Sir where is carburetor base???

[@darine7462]

My engine hv starting problem. Help me out.

[@bartonhannah8977]

This was an excellent video, thank you very much.

[@hairyoldhippy]

Tamper proof is tantamount to non-repairable. Unblocking wee jets on carbs by air blasting necessitates removal of the screws. As with all equipment, tamper-proof means early consignment to land fill and increased material consumption. Would be nice if legislators had the wisdom and tech savy to think things through. One also finds with 'new' fuels or to compensate for wear, carbs need a tweak to get machines to run cleanly.

[@rickyblack9388]

How do you find out how much the centrifugal clutches

[@joecasual2952]

Another example of corporate-capitalists and pseudo-environmentalists working together in the dumbing-down of America. Throw-away society for sure.

[@steadyeddie7453]

@@joecasual2952 We can thank our politicians for opening up our economy to the Chinese, combined with Americans choosing lower price over quality. Made in America with global parts does not give me any comfort. Would you want an American surgeon replacing your hip/ pacemaker/etc from one made in China?

[@hhoward14]

Never a truer set of words. These people seem to infesting all aspects of life, but we are not suposed to mind. the thousands of basicly good machines scraped off to prevent them burning a litre of petrol a year, and "destroying the planet". Well the people doing that are destroying me..... Same with a few other things as well. None of these things do as good a job as they did ten or twenty years ago. But say nothing......

[@pacman3908]

Weed wacker trimmers saws need a carb adjustment usually after break in or lots of work hours on equipment do to wear these no tamper adjustment screws suck big time

[@MrMartin0815]

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

[@scbuilds2303]

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

[@bobbyk.goforth1266]

repairing homelite hb-100 blower, has walbro carb (up00652) cannot find parts listing for mod #, owner lost a small piece from the pump mounting, need help with new carb or detailed parts listing

[@bobmccuewithwalbro7349]

Hello Bobby - could you please look at the side of the carburetor and advise the Walbro part number? Will have letters "WT" and then a series of numbers. If you can provide this information I will be able to help you.

[@bobbyk.goforth1266]

@@bobmccuewithwalbro7349 found part # but evidently carb no longer in existence, found another old carb with part I needed, leaf blower running fine, thanks for reply

[@bobmccuewithwalbro7349]

@@bobbyk.goforth1266 - glad to hear you blower is running.

[@allenletizia321]

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.

[@bobmccuewithwalbro7349]

Sounds like your idle speed screw is set too high. This is the large screw on the pump cover of the carburetor. Back it off and see if that helps.

[@DodgeNbullits]

The pop-off test passes when I disassemble the carburetor, with the needle valve and spring assembly installed, and seal the fuel screen orifice with my finger. Any clues?

[@bobmccuewithwalbro7349]

DodgeNbullits - send a quick email to [e-mail] with your contact information and we will have a technical service rep. contact you.

[@ralphtamez5492]

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

[@tomalophicon]

They said mineral spirits

[@1pcfred]

@@tomalophicon I have a bunch of rocks and a Ouija board and so far I've had no luck summoning any mineral spirits!

[@tomalophicon]

@@1pcfred you need to sniff the turps before you start.

[@1pcfred]

@@tomalophicon Roger wilco. Over and out!

[@philstat100]

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.

[@gangadharnaicker5643]

phillip staton q

[@Budro4764]

OK it's a WT 538 not a W1 538 Walbro carbs on weed eaters and chainsaws have a WT plus 3 numbers following ....... The screen is easily taken out with a small pick... Like a dental type pick bought at a drug store.......

[@65csx83]

Refers to fuel being delivered to crankcase area. which is below the piston; I thought fuel is delivered to combustion chamber which is above the piston.

[@chrisstokley7687]

??? bet is fuel pump: mechanical pumps turn by inside the motor crank... and if the seal brakes down .. then the fuel its pumping can fill the engine oil with gas !

[@1pcfred]

2 stroke engines are different than 4 cycle engines.

[@65csx83]

@@1pcfred Yes. I was unaware of cross flow savaging. Thanks for pointing that out.

[@brandonwebb2100]

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

[@LLuE88]

8:07 is this screen check valve in the rebuild kit or separately available? how to remove and or clean? regards

[@davidlis6709]

Excellent video Thank you

[@rofilhobr]

Hello! What would be the models of carburetors used in gasoline engines used in RC Airplanes?

[@David-hm9ic]

There are several model airplane forum websites that are very helpful. The model number is stamped near the fuel inlet. About half of my carbs on gasoline engines are discontinued. Walbro has removed their specs and substitutions pages from their website so selecting a new carburetor is a big guessing game.

[@chrisstokley7687]

those are Alcahol based fueled carbs...

[@animalcorvair]

i fix them to i can adjust them ...epa does not have a clue that fuel changes from winter an summer ..

[@hedleylint7622]

Hard to get help from Walbro or repair clinic or get any response from any one. Were can I get the tool to adjust the deedle vealve (float) level and is a main jet available any were

[@ShotOut55]

Just use a straight edge...or go on ebay. They are there.

[@chrisstokley7687]

probly late but.... Alliexpress ..com... poke in your model # and wow .. they got it all.. china multi companies on 1 site.. kinda like ebay for usa.. ...long wait time .. 45- 60 days .. but over 200 times.. im like.. alot stuff 10x cheeper.. like carb average $10 they throw in free .. spark plug + air filter + gas filter + hoses + crazy good !

[@chrisstokley7687]

ooh 1 more- the W key tool = dont need it ! REAL talk : streight edge over it.. make sure it touches it ... ( supposed to be 15 thousands). human hair is 10 thousands. bend it till it barely hits the streight edge! other tool he used for screen- use a #2 pencil erasser :>) works great ! be aware : alot carb kits dont include the cap(all parts) dont remove till sure if it does ! GL2U

[@franzefrancis5512]

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

[@markparee99]

Hey Grey, I think many Stihl small 2 cycle engines use Zama carbs check out the Zama carburetor channel. They've got a vid of a complete rebuild. Cheers.

[@Sensei948]

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

[@mattswartz1841]

I need a new walbro carburetor for my old homelite xl 21 146 any idea if i can get one.

[@chrisstokley7687]

Dude: this place got them all.. just pop in model and wow... alliexpress.com.... $10 or so... get alot xtras.. like plug/ hoses /fuel filter/air filter.. try em out!

[@johnh9507]

I want to know what is the difference on the fuel pump side, when you get a brown color diaphragm , a blue color diaphragm and the most common one the black color. who out there can tell my what is the difference.

[@ShotOut55]

Brownj diaphragm is made of teflon. Blue diaphragm is made of mylar. Black diaphragm is made of butyl rubber. They all have the same function.

[@johnh9507]

thank you, but their has to be some difference or they would not put the extra ones in the kit, most carburetors especially WT carburetors come originally with the rubber diaphragm.

[@dave1135]

John H the blue diaphragm is supposed to be more ethanol resistant than the black butyl rubber. I always install the blue one when rebuilding.

[@un-_-known688]

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

[@maurizioavanti6869]

salve: io ho uno scooter aprilia atlantic 200c, che non si avvia regolarmente, a freddo parte ma a bassi giri, e come apro il gas il motore si spegne.vorrei sapere quale' il problema?

[@bobmccuewithwalbro7349]

Potresti consigliare il modello a carburatore Walbro del tuo scooter Aprilla?

[@LLuE88]

check valve nozzel feed hole , is there a mechanical way to check if it is loose?, regards

[@LLuE88]

never mind the "screen" was totally and vent tunnel was totally plugged, had to soak plus blow out in both directions, regards

[@karlnjackshomebrew1648]

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

[@Nudnik1]

nozzle metering check valve clogs alot hard to clear it. Not removable? Ultrasonic cleaner s can clear it. I soak in Techtron overnite first.

[@robertclauss9579]

mitzvah golem

[@Nudnik1]

@@robertclauss9579 yes Laquer thinner works also.

[@D4x4Bronc]

visit our walbro website where none of the carb or manufacture part numbers work.

[@GNX157]

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

[@watcherwatchmen7785]

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.

[@barbbusch2983]

hi there, why would the engine start and run for about 10 15 mns. then shut off?it dose not run well in hot weather. Please advise, Thank you, Barb

[@katanamd]

+Barb Busch Unscrew the High end needle. It's most likely too lean and overheating.

[@barbbusch2983]

+Weese THank You Excellent video ;0)

[@DaveCole-daveainthere]

@@katanamd Prison!

[@georgianet]

Your coil is bad.

[@obfuscated3090]

How about a DETAILED TESTING and troubleshooting video? That would benefit your OEM customers by reducing complaints. Covering the similar but somewhat different HDA series would be nice too. It's not as if production costs for this style KZbin video are high and it would also improve the customer experience.

[@lafayettedurham3257]

T

[@supermario9332]

So I have a 2 cycle craftsman weed weaker with a walbro carburetor ok. But all of a sudden am not getting any power out of it an when I give it gas it seems to stifle so what could be the reason for that?.

[@chrisstokley7687]

more than likely.. its the screen over the muffler: its plugged up carbon! cant breath engine! alot peeps drill xtra holes in it... yes louder.. but breaths better and is tunable to higher speed from carb ! also check plug!

[@jeffball1875]

I found this video quite informative. I have two fairly new weed eaters that hard start and kill when I give it throttle. Any advice?

[@chrisstokley7687]

sounds like mufler screen clogged/ engine cant breath... /sometimes new gas isnt new ! clogs ... also too much mix 2 cycle.. usually 1 screw and screen can be taken off to clean !

[@clydestamp1198]

awesome . I will watch all your vids. thank you

[@Sertao2013]

My fuel hose connection broke about 1mm above the carb itself . I pulled out the piece that was left inside the carb . So I'm ready to put a new piece in . The carb has WA with 99 under the WA and a F1 in the lower corner on the same side as the WA 99 same side as the broke fuel connection hose piece . I can see a number 28 on the top around the big hole opening . The word walbro is on one side of the carb . I don't see a part number for the metal fuel line connection piece . How do I go about getting this piece ?

[@chrisstokley7687]

try alliexpress.com my fav store.. they got all.. and just poke in your type equipment.. pow ! alot times get xtras with your new carb.. cheep like $10.. + gets like plug/ hoses /filter ..ect

[@cleric022684]

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

[@kenneth6731]

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

[@bobbg9041]

How do you adjust the carb on an electric weed eater?

[@ShotOut55]

Just by faking it.

[@gregmccarter3640]

bobbg you must smoke pot first

[@DaveCole-daveainthere]

@@gregmccarter3640 I told my customer that my weed eater runs on coal.

[@brucel.6078]

Its behind the flux capacitor

[@curtrager9503]

I have a Poulan Timbermaster 3800 chainsaw with a Walbro 21-245 carb. Wher can I get a new carb?

[@chrisstokley7687]

absolutely got all models ..china /10x the price too .. : alliexpress.com ..45- 65 days .. and walla. all for like $10.. and get like xtra stuff.. plug/ fuel filter/ air filter/ hoses.. :>)

[@clydestamp1198]

which fuel pipe did you inspect first ???

[@mansournamvar419]

Excellent very very good information Ty for that

[@TheRepairGuru]

Very well done & informative thanks guys!

[@raultorres3437]

where can I find or pick up a carburetor kit for a homelite backpack blower ut08017L

[@chrisstokley7687]

all carbs are 3x the price usa= go: Alliexpress....com...poke in your type and walla.. alot times is like $10 + get xtras.. like gaskets /hoses/plug/airfilter./primer bulb... only dowside is 45-to 60 days wait! this yr i ordered over 200 seperate times and only 1 time.. i had to gripe to get my $ returned!

[@roblord7610]

What does he say at 7.10 - 11?, - idle something holes

[@bobmccuewithwalbro7349]

Idle progression holes.

[@eduardomaxros738]

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