HOW-TO Rebuild A 2 Cycle Chainsaw Carburetor - video

HOW-TO Rebuild A 2 Cycle Chainsaw Carburetor
In this easy to follow video I show you how to rebuild a diaphragm 2 cycle carburetor.
You will find these carburetors on chainsaws, weedeaters and other outdoor power equipment.
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Easy to follow and thorough step by step tutorials do it yourself (DIY) to help you with your broken lawn and garden equipment including snowblowers.
I do my best to teach you how to easily diagnose problems the fastest, quickest and most efficient way with real repairs beyond just replacing a spark plug. These tips are for both the homeowner and shop owner.
Whether it be a handheld, two stroke, two cycle engine like a chainsaw, weed eater, weed wacker, string trimmer, grass trimmer, line trimmer, hedge trimmer, strimmer, brush cutter, leaf blower, or four stroke, four cycle units like a lawnmower, wood splitter, lawn tractor, snowblower, pressure washer, generator or a ride on mower that needs parts installed or replaced, I’m your go-to guy.
My favorite brands of spark plugs are NGK and Champion and are the ones I recommend.
I’ve been a small engine mechanic for many decades and also run my own repair shop so my videos are loaded with tips and tricks that I have learned and want to share with you. You will also find many tool and product reviews from top brands on my channel as well.
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I want "DON THE SMALL ENGINE DOCTOR" on KZbin to save you time, frustration and most importantly, MONEY with my HOW-TO videos!
Due to factors beyond the control of DONYBOY73 “The Small Engine Doctor”, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. DONYBOY73 “The Small Engine Doctor” assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. DONYBOY73 “The Small Engine Doctor” recommends safe practices when working with power tools, hand tools, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of DONYBOY73 “The Small Engine Doctor”, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not DONYBOY73 “The Small Engine Doctor".
#donyboy73 #smallengine #walbro

[@danesoltis6155]

I'm 11 years old and I know a lot about internal combustion you inspired me to try and start my own engine business

[@donyboy73]

+Dane Soltis nice to hear that!

[@billmaxfield7831]

6 years later how are your small engine repair skills?

[@samburd7240]

@@billmaxfield7831 im curious my self

[@Chollanger148-pv8jp]

@danesolits6155 Are you still planning on starting a small engine repair business?

[@frundlemud]

@@Chollanger148-pv8jp probably discovered the fairer sex.

[@SteveRobReviews]

It's so nice to watch a guy that really knows his stuff. 👍👍

[@donyboy73]

+Steve Rob thanks Steve

[@timwilson2920]

A gift that keeps on giving, thank you for your thorough attention to detail.. I almost gave up on figuring out how to install the needle until I found some help. I couldn't see what they were doing on all the other videos that I was watching.

[@love_4_rc180]

Excellent tutorial👌🏽 You gave me so much confidence to rebuild my walbro carb. Keep up the good work.

[@Chollanger148-pv8jp]

I bet much appreciate your calm and concise delivery. This is my go-to channel when I need to fix my small engines

[@gcabinet]

Literally STILL following this video tonight to rebuild a Walbro carb. You are great at what you do

[@haeke69]

Thankyou . I followed your tutorial and just fixed my first small engine carby. I bought a brand new Echo blower and have been constantly having engine flooding problems for the last 2 weeks so I pulled apart this morning and found the lever was barely adjusted. I followed how to lift the lever and make level and now she starts instantly. Problem was driving me crazy not being able to use but now I know how to fix so much appreciated.

[@ianrobinson9565]

Thank you DON.Your video is one of the clearest and best explained out there. I have saved it for future reference when I service my own small engines.

[@carlosdanger2586]

Thanks your video helped me get Husqvarna Model 36 chainsaw running it was sitting in my shed for 10 years I never goof with it

[@3cheese711]

I got a pioneer p50 chainsaw from 1974, it's having carb problems and this video helped a lot. Little diffrent carb but helped me with the basics

[@prehensileman7254]

The best video I've seen to date on Walbro kit installation, quick, easy to understand, all under 7 minutes, a great video!

[@jonathanbosco8458]

Thank you I am rebuilding a Walbro Carburetor in small engine repair class

[@99carnot]

Very helpful, especially the pressure test!

[@grape142]

Excellent, as usual. Thanks for your time.

[@donyboy73]

+grape142 thanks

[@KandyLandKing]

Always the best at explaining stuff that really helps. Thank you, sir!

[@AffordBindEquipment]

This is an A-1+++ video. Super clear shots and explanation. Others here on youtube could take some important lessons on how to make a vid from you.

[@anniversary4]

Thanks for yet another great video. Great in both content and technical clarity. Your video quality is the best I've seen; always making sure we see what you are discussing as well as the focus and clarity.

[@donyboy73]

+anniversary4 thanks

[@Slowpoke5055]

Very good. Though when I do the pressure check I take it to where it pops off or opens. Around 15 psi. Then monitor tester to see where it re-seats. Should be around 5 psi. Needle should be wet per Walbro but I usually forget to do it anyhow. Thanks again.

[@Rattletrap2]

Great video Don! I know it is 6 years+ old, but timeless information well presented!

[@jimmymac1957]

Always a great video.Thanks Donyboy.

[@muffchinthe3rd515]

Very well explained, thanks 🙏

[@sirmaxwellvonfleckenstein5376]

Thanks - used this as a guide to rebuild by Echo blower carb. It was previously bogging down on start, taking 5 minutes of running before it worked. Starts and works great now. Just note the order of gasket vs diaphragm on reassembly as they are different on each side.

[@rickjames6948]

That is one great tip, gasket installs and where they go on each side.

[@pauldicus1530]

Thank you great job very easy to follow.

[@chijanngo]

Very good video !! Thanks!

[@tyroneclarke1666]

Beautifully presented and explained video Don👍.

[@johnnorland5177]

Well done!! Excellent video.

[@jamesmullins3219]

thanks for a good video. You edit raw film very well. great close up shots for this "small work". I think this is one of your best videos. keep em coming

[@donyboy73]

+James Mullins thanks

[@geojor]

great info, thanks...

[@gilbertdavies]

Really good videos Donny, not knowing the sequence, & needle setting can make yoi chase around in circles! Very many thanks. Gil

[@ItAintMeBabe99]

Excellent !

[@Arizona-.Native.Joshua]

thanks help me out a lot so much 2 learn

[@carlssmallenginerepair2700]

Great Video Don! I enjoy watching your videos.

[@donyboy73]

+Carl's Small Engine Repair thanks Carl

[@floydrturbo1]

Another well done video.

[@59chevt]

Don that was excellent, always a pleasure to learn from your vids.

[@donyboy73]

+59chevt thanks

[@ronbonick4265]

Thanks Great info

[@big_mike_nyc]

Your videos are all so informative! Thank you! I have a Walbro HDA 116 carb and I cannot find a rebuild kit for it. Can you tell me what other Walbro carb rebuild kit I can use for my Walbro 116?

[@Grandpasrcbarn]

excellent how to

[@scottlafosse4317]

great job thanks

[@donyboy73]

+scott lafosse thanks scott

[@paullarson2178]

Thanks Dony for your comments about those Carb Springs. The only way to retrieve them (once they pop-off) is with a Stealthy magnet over a large amount of territory. I have learned lately, however. Stay warm up there!

[@donyboy73]

+paul larson thanks

[@tyroneclarke1666]

Great video thank you. 🦘

[@639Beaver]

Piece of cake. You make it look so easy.

[@donyboy73]

+Walter B thanks

[@vincef9327]

nice. used to rebuild my 77b

[@bellasol3972]

Great Video, bro.

[@philfalz01]

thanks for the video very helpfull

[@donyboy73]

+Phil falzone sr thanks for watching

[@GHULAMABBAS-bs4hy]

Very nice

[@thebubbacontinuum2645]

Thanks for this great video.

[@thebubbacontinuum2645]

Finally got my Echo CS590 running.

[@garyjones7219]

Just the exact video I needed thanks. The discount parts co. and another parts store charged $7.95 for the kit, but both places wanted $9.95 shipping. So I checked Amazon, an exact o.e.m. Walbro kit for $7.95 and free shipping.

[@rickjames6948]

Most everything from SCAMAZON is direct from China and not real deal Walbro parts. They are copies of the originals. Doubt you saved anything. To the contrary, probably have to order another kit to make it run right. Stay off of Amazon for mower slash trimmer parts.

[@googleplusisdead]

Great video, thanks. How to you remove/replace the plastic(?) parts? Are they replaceable individually if broken? Thanks.

[@MowerMike]

Excellent video even 7 years later.

[@jbbolts]

thanks! the diaphragm was missing on the carb of an 026 I recently acquired and I couldn't figure out where it went ...the saw was a mess... it was not idling when i got it it was revving really high... I got it to idle perfectly by pure luck.. the gasket was missing on the metering diaphragm side and the diaphragm on the other side was also missing.. it would start on the first pull and i got it to idle and run perfectly this way lol.... then I ran it in winter mode on a super hot day and it started flooding no matter what I did. Took apart the carb and noticed the gasket missing. Then when i got the rebuild kit I noticed the translucent diaphragms for the other side which wasn't on the carb and had no idea where it went.. thanks your video really helped! :)

[@cubbeezx]

Great video Don! Have a good weekend.

[@donyboy73]

+cubbeezx thanks

[@pm270100]

good vid i i just did same thing on a scd on a old homelite

[@MrBucidart]

Nice, very nice

[@cloverleafrepair5635]

excellent video. i suggest you also add a link for carb pop out pressure tester sten 705-020. i have replaced jonsered 70e ignition. has 50 psi. how & where do i check for compression loss ? i have ordered new indian made vec piston & rings. txs

[@lovestihlquality1369]

I'm having difficulty with Stihl MS 311 / 391 carburetor. Not sure how linkage and operaton is supposed to work. Would be awesome if you could explain some time. You're the best.

[@bellavaldez6368]

Dony, do you have a video on removing/replacing the butterfly and shaft of a carburetor?

[@bingo45373]

I got to do that to my snow blower before it gets bad out had troubles with it last yr with starting it

[@daved.4740]

Hey Dony,I have a small similiar Tillitson, the nylon fuel inlet is cracked on both sides. I was told there is no replacement part. What direction do you suggest...maybe an petroleum friendly epoxy from Can Tire?

[@edirckze]

The best video on rebuilding a carb I've seen to this date. Clear, precise, and straight to the point. No beating about the bush as many others do.

[@stevealfred536]

Could you please include a comment about the initial settings on the low and high speed adjustments? Thanks

[@wtbm123]

Cool

[@scottfirman]

I was once rebuilding a chain saw carburetor on our patio table, it was a nice warm day. I had just cleaned everything using my ultrasonic cleaner and had it sitting on a piece of cardboard on the table. I had just opened the package of parts and lay them out on the cardboard to get ready to assemble it. Suddenly a gust of wind blew the sheet of cardboard off the table and I watched as it flipped over the rail into my ferns and other plants below the deck. I almost died! Luckily, all the parts had dropped straight onto the deck, not over the rail. I was able to find all the parts, even that fine spring and the screen! After that, I learned to tape or use a weight on cardboard when working outside. Mabe my wife will let me build a workbench on the deck next summer!

[@coma3550]

Hi dony, just wondering which side the fuel enters the cardy from the fuel tank? thanks

[@bronzechicken4437]

Question, when you want to reset the jets on one of these carbs due to them being improperly adjusted by the PO, what's the procedure? Saw is a Huskvarna 375T

[@jbbolts]

all the way in to completely seat them carefully to not over tighten ...then one turn out each is usually a good starting unless you have specifics on your saw than follow that

[@woodbeeturnings]

Hi Dony73, are gaskets needed between carb and air horn and also between carb and cylinder intake boot? Don’t see them in Walbro or Tillotson carb diagrams or kits and don’t see them or part number on chainsaw IPLs. Thank you!

[@anderslindstrom8195]

Such good videos. Thanks so much. What brand of picks are you using? I want to get some but I guess there's a lot of cheap rubbish nowadays?

[@adamdorris4081]

The die grinder is noted suggested and be careful with that air blowing into those check valves. Need to remove each adjustment screws too they are also bottleneck restrictions and can get jelled up after sitting for awhile.

[@trmdito]

Am fixng a Husqvarna 125b Blower for a friend of mine. What is the correct setting for the needles? Someone tampered with it previously and am having problems trying to make it work properly.

[@insertgoodname4809]

On the metering side. What is the brass colored thing with the hole in the middle? Mine looks like there is something behind it. Can that be removed for cleaning?

[@47bettyann]

Hey Don how would you replace the Welch plug on that carb. That part is easy I noticed in most rebuild kits they provide the Welch plug but I've never installed one. How do you do that?

[@christinamoneyhan5688]

You Polk a hole ( carefully ) in the old one and remove it. Clean the passageway and put the new plug ( round Ed side facing out ) in and put a small dimple in the rounded hump to force it against the side of the hole to seal the hole. That’s it.

[@174joedirt]

would like to know more about that pressure tester

[@yrulooknatme]

does the gasket throw off the metering tab adjustment?

[@11bayrat]

I wound er if you already have a video on a Walbro One fuel line intake and installation of a two pipe walbro carb????

[@luke123918]

Do you know if the plastic elbow pieces that are on the walbro carbs you can buy separately? Ive got an old chainsaw where one has a crack on it, causing fuel to run back to the tank

[@donyboy73]

i'm pretty sure you can

[@9474Larry]

After siting for years my engine seemed to run perfectly until all the fuel lines decomposed. I replaced the fuel lines and then it was hard to start and only ran for a few seconds. I rebuilt the carburetor similar to yours after completion the problem persisted. Any ideas? It will run using spray starting fluid.

[@chuck805]

I watched this a couple times, then when I couldn't start my McCulloch Pro Mac 10-10 due to a fuel issue, I removed the carb, took the metering cover and diaphragm off, discovered the metering lever had been adjusted way too low, starving it for fuel. I readjusted it, then checked the High and Low mixture screws, found the High was 1 turn out and the Low was 2 1/4 turns out! Somebody before me probably rebuilt this carb without checking the height of the metering lever! Thanks for this very detailed instruction video, it really saved the day for me. Be safe and have a great day!

[@roadrunner8428]

Dony I wonder If you have ever replaced a non primer bulb carb with a carb that incorporates a primer bulb. I have a Maruyama bc184 trimmer that has not been behaving for the past four years. I have rebuilt the Walbro carb twice using the kits but still gives me fits. Where it used to take a pull or two now takes twenty to start. I wish the carb had a primer bulb, are all of these replacement string trimmer carbs equal bolt ons? I know I would have to add a fuel line for vacuum to the the fuel tank but wondering if it's possible.

[@raymondcampbell2346]

good job Don keep up the good videos. When I get stumped I go to your site, Jeremy Fountain's, Bruce Pender ( the Godfather of small engines -lol) and few others. thanks again

[@donyboy73]

+Raymond Campbell thanks

[@paulfacio2203]

Hi Donny, At the end of the video you checked to see if the HDA120 would hold pressure. If it did not hold pressure where would you look first for the loss of pressure?

[@donyboy73]

+Paul Facio around the covers and needle valve

[@micanopykracker902]

Donny what side of the carburetor did you put that pressure gauge on the purge bulb line side or the out of the tank side my guess is Purge bulb side

[@davidaldrich3488]

Bingo……. Took awhile to find you but well done

[@drmikeyb1]

Fantastic video sir, on the metering valve is it a standard practice on other carbs as well to be flush along the sides of the carb. I hope i explained that correctly. Thank you

[@donyboy73]

Usually is

[@drmikeyb1]

Thank you

[@brucedonnelly6567]

How can I find a replacement walbro wt141 ?i look but there all different

[@PeterAgostiniJdcap26]

An what does one say when the spring pops an flys across the room ?opps LOL nice to have a magnet pad over an near by . :-) Good Job Don. cheers

[@bartfart2123]

brilliant!

[@danboisclair893]

Where did you purchase that pressure tester you used? Very informative and I really like the close up shots!

[@donyboy73]

you might find it on ebay or amazon

[@siobhangagliardo3229]

Great video quality all around. I'm rebuilding this exact carburetor. What about all of the other items that come in the kit? I don't think you made any comment about them. Thank you-

[@jbbolts]

if they dont match anything in your carb they are most likely meant for a different carb... not sure if its always the case but the kit covers several models

[@jonb6903]

what is the kind of compression tool you are using?

[@glenngressley3345]

should i not be blowing compressed air thru all the passages?

[@ChueyMr11]

My Walbro wyl carb passes the presure hold test. But fails pop off. You didn't do a pop off test, several techs and Zama advise not to do a pop off test. Carb did not pop off at 35psi, i did not want to exceed that. Will my carb work?

[@DesertDigger1]

Hi Don, thanks for posting your how to videos. I got stumped today. I've hot a Ryobi cultivator with a Walbro WYA-72-1 carb, (the most expensive one, just my luck) Today I installed a brand new carb along with new fuel lines, filter, and cleaned the gas tank, the whole fuel system is new, still won't start unless I spritz gas in the carb, and onle runs on that and quits. I'm at a loss Don, any ideas? Thanks!

[@jesseramos1561]

Sparkplug arrester screen is cllogged..what is sparkplug gapped at.increase to.030.then try cranking. Im Just a Shadetree mech. Be well my friend..when one tinkers he learns.

[@davidruiz5383]

I noticed cover with 4 screw has a small hole,does it matter which direction that is place. I have walbro 416 carburetor on chainsaw. Thanks.

[@johntech75]

Is that metering gage good for all Walbro Carbs?

[@ablelock]

I've never seen it as a pressure gauge. I have seen vacuum type gauge is that the same as what you're talking about what is the brand and the part number that you have.

[@donyboy73]

+Able Lock this one is only pressure, I use a vacuum and pressure on leak down test, this one is rotary part# 32-11321

[@simonflores3410]

i have a craftman model#31679191 try to start it an it backfire an pull back when trying to start it, is it timing or what do I check is a trimmer

[@acme855]

Well I have to be honest when involving Jesus. I must have taken that carburetor off and apart at least 5 times. I spoke to a old timmer and he said it doesn't get gas it won't fire. YOU the man was sent to me in adjusting the needle valve. Thanks so much Brother.

[@fransisco95396]

If the gasket and diafragm ia confused position up down ora else, is that can make mechine cannot idle? Or is ok tha teh diafragment and gasket is confused

[@paulg444]

no loctite on those backplate screws on the metering side ?

[@danoakley6538]

People say not to blast the ports out with carb cleaner and air. So how do you clean them out? Or is it not because dry to do it? I've been using carb spray and compressed air. Sometimes it works and sometimes it doesn't.

[@slobodandonkorleonetodorov6376]

I did the same thing like you did on my carb,but my chainsaw is stil flooding,what i shuld due next? I have Stihl 029.Thanks