If this video helped you, please consider clicking on the THANKS button above to support my channel 🙌 and don’t miss this video on other areas that a carburetor can leak! ruclips.net/video/PsG23Xj1XCY/видео.html
Thank you Tom for another excellent and highly informative video. As always, your explanations are clear and concise and your camera work, sound and editing are second to none. You should be very proud of your work.
Another brilliant video thanks Tom. It’s great that you don’t rush through the explanation of how things can work. I especially appreciate the way that you tell us what not to do and how to avoid rookie errors. Well done 👌🏻
If you always use the rec stihl 2stroke oil you prob wont have these issues for a lon long time if ever they dont rec that oil for just any reason it protects the rubber and brass aluminum parts from wear throughout the entire pice of equipment aka read your owners manual sthil strictly warns and also voids your warranty if you use cheap 2 stroke non approved lube
That’s simply not true, in fact Stihls 2 stroke synthetic oil is actually very low quality - JASO FB rated. In fact it’s one of the worst you can buy! There are far many more better oils that offer cleaner burning and more affordable.
And then you can enjoy the rewards of having to pay silly amounts at your local mechanic because the manufacturer doesn’t allow users access to the software - a stihl 500i sounds right up your street ;)
Thank you for teaching, an old dog new tricks. I am a 73-year-old retired engineer, who has tinkered with engines and all things mechanical & electrical ever since I was eight years old. Very grateful to my Father, who allowed me to fail and learn from failure. I even owned an original McCulloch chainsaw, which was a beast to keep running, but 20 times faster than an ax. I still fix my own carburetors and a lot of carburetors for other people. But like others, I never knew about the accelerator pump on the small engine carbs. Again, many thanks !!
So at 72 years old and a retired small engine mechanic, I’m now just learning of a JIS screw head! Best kept secret in the world! I’ve always just used Phillips.
Japanese are humble stating JIS their industrial standard. Anyone elsewhere their standard IS glue ,pop rivets ,cable tyes and one piece non fixable cast plastics for everything .
Thanks Jim! I hoped it would be new to many, it’s rarely discussed and even less shown how to repair. For 20 cents and a few minutes, it could save a lot of frustration and money!! :)
I love the specialized info that is available here...and the gutsy way that Tom removes tiny parts from a carb on a tree stump! I always use a work bench and a white rag to make things easier to see!
Man, I’ve owned my lawn service 36 years. Prior to the introduction of ethanol fuel I rebuilt more than 50 zama cards on stihl 2 stroke lawn equipment. I started having problems with welch plug sealant loosening up and allowing an internal leak between a couple of the passages. I became disappointed and just started buying Stihl OEM carbs I feel lucky to have lived back when it was a black art to tinker with carburetors. And honestly…..I just threw away at least 100 carburetors that I had replaced after I quit rebuilding them.
So some of the accelerator pump carburetor models have a metal plug pressed into the top of the 3rd bore. Getting that plug out can sometimes be tricky as you have to remove the throttle shaft first and then hold the pump piston down while using an angled pick to drive the cap out. Also it is worth noting that usually if you look at the pump piston you'll see the side of it is scored up badly and that scoring is transferred to the bore which is what tears up the o-ring. The way the piston is operated the force applied to it isn't straight down, it's off center and as such the bore gets ovaled out and even with a new pump piston they usually don't go for very long before developing another vacuum leak in that area. I always recommend replacing an accelerator pump model carb once the pump/metering gaskets are used up.
I am still using the same Husqvarna Rancher 44 and 61 that I bought in the 80s when they made them in Sweden . Thanks for explaining the carbs I have rebuilt them carefully and they still work quite well . I always keep the extra parts included in the rebuilding kits and they can be used for repairs if you punch new holes where they don't match your carburetor . That zip lock bag of extras is a treasure .
You can :) but always best to save the oem one wherever possible. This process is easy, only takes 5 minutes to do and costs just 20 cents for the o-ring (I keep 20 or so of all 3 sizes on hand).
This was the best and most educational video I've seen in a long time!! wow thank you! My Ryobi 4 stroke weed eater is now giving me issues after 4 years and it bogs like crazy, also has lost power so much! Even at full throttle it barely does much....now I know what to do! Thanks again your videos are so helpful! 😀cheers from Canada
Ive rebuilt carbs for 50 years. If the o-ring is shrunk the diaphram is puckered also. Most carbs can be purchased new for $10-$20. I haven't done a carb job in years. Not worth wasting all that time.
I can do a carb kit and acc pump in just a few minutes for a couple of dollars, but of course ymmv and we can’t get carbs that cheap out here. Not to mention aftermarket is very unreliable.
Next level tutorial, Sir, about a subject few of us knew about!! One thing, though! You spell CARBURETTOR with an E, yet pronounce it with an A! Is this aimed at your northern market, or how your Dad taught you?
Hands-down one of the top three best videos I've seen on RUclips in regards to a two-stroke carburetor repair. I honestly can't wait to watch more of the videos that you have and you sir just made a subscriber out of me with just one video. Not that it matters Terribly to you or anybody else in particular but I can count on 2 hands the number of times a channel/content maker on RUclips managed to get a subscription out of me with just one video :) you earned it IMHO and the only thing I'm disappointed about is the fact that my lunch break is over in a couple minutes and I will have to wait until I get home from work to see what other topics you cover and watch some more of your videos!! 🎉
Wow such a lovely comment, thank you! I sent a screen shot to my family 🤣👍 so pleased you enjoyed it that much! It makes the time and effort all worth while when people like yourself get value and enjoyment out of them! Thanks again!!
Brillliant, I have two of those carbs one on chainsaw the other on hedge trimmer, both with those symptoms. Pulled my hair out on both but as I have alternatives have put off buying new carbs . You have given me an avenue to investigate that I wasn't aware of. Mind you at the price of those carbs maybe I'll just swap them anyway,
Excellent information and explanation. I sure wish I had seen this video a couple of months ago. I had to replace a throttle shaft due to a difference in the cable linkage. I found the pump quite by accident when I removed the shaft. Only thing is I did not see a screen. It all worked in the end though. Also good tip on securing the spring. Secondly I didn’t know that the butterfly’s were slightly oval. I recently fought, and lost, to get one back together. I ended up buying a new carb. Cheers Tom
Nice tutorial Tom, I have been using the oil trick for a few years it works well. I sometimes do the same for finding leaks on two stroke intake, crankcase and barrel base gaskets.
I've worked at a small engine shop for several years. I have read dozens of repair manuals, taken brand certification tests, and spoke to the other techs I work with. Yet, I have never been told about this or showed this before. I cannot wait til my next "problem child" comes along so I can try it. THANK YOU.
Excellent information!! This confirms an issue I've been having!! But just picked up ne carb today believe or not!! Ill strip the other and check it out for curiously if nothing else. Thanks again!!
I couldnt find anyone that could supply a new oring or piston for a C1S Zama so i just plugged the bore with JB weld and drilled the second idle progression hole slightly bigger. Saw runs great now but does use more fuel
I'm wondering if this is the problem I have. I have a leaf blower and a chainsaw that won't run right. I've cleaned the carb out on both, and changed parts too.
Mabe but I also had this problem with my chainsaw I so sent it to the shop and it was fixed for a short time then problems returned. An old mechanic friend of mine then showed me the problem the shop had lazily just adjusted the throttle and idle screws but the problem was the diafram had a hole so small i needed a magnifying glass to see it. Changed it had to reset to throttle and idle screws to factory settings (idiots) then ran like new.
I agree about no alcohol! I use the lowest octane personally as none of my engines have been modified to run higher compression or enough ignition advance to warrant higher octane.
I find that it is the pinhole tube that goes from the fuel float reservoir to the bottom of the venturi air valve is most problematic. If you don't drain the gas or leave it over the winter and try to start up in the spring, residues or varnish plugs up that tube, therefore no gas gets in the venturi.
Ah yes, the check valve in the main and idle drillings. They are normally very reliable, but I don’t have ethanol in my fuel, that may be making things worse for you?
This video popped up at random and there is some great knowledge about how these little carbs work guess I hit the lottery on extra knowledge I didn’t know about.. thank you for sharing your knowledge
When you can buy a BRAND NEW Walbro or one of the 20 different clones of them for under $50, why would anyone bother repairing one? I have pulled many of these apart over the last 40+ years, and they NEVER work the same again after reassembly. 99% of Go Kart drivers have a box full of these, for all different tunings to suit all different tracks in all different weather conditions. The guy's who are consistently on the podium aren't going to waste time pulling a $50 carby apart to make it worse than it was. The rebuid kit is almost as much as a new carby anyway. I have a box full of them for my petrol engines on RC aircraft and petrol powered gardening tools. If your having issue's, the simplest fix is to replace, if you mess up the pop off tension or damage a jet or bend the delicate float arm or whatever, then your carby is stuffed anyway.....all you need to do is lose ONE screw, spring or washer and your carby is garbage aswell.
A box of O-rings is lighter to carry, but rebuilding stuff requires skill and patience. And if you learn how to do it well, you can do tiny mods to increase the gas flow and performance too. But it's harder! That's the difference between a real mechanic, and a fitter IMHO sir.
@@chriswalker4272 Rebuilding one of these is simple enough, as is re-jetting. but 90% of people that own a chainsaw or other petrol powered machine either don't have the knowledge or skills required, the patience to do it or the tools to do it correctly, so my comments are true. I have spent more time in the last 40 years reassembling these carbs than I care to admit, and it is simply a time consuming annoyance that can be fixed much faster and easier by replacement. We live in a disposable world more than ever, somethings are simply NOT WORTH FIXING anymore. A cheap 40" bar chainsaw costs less now than a carton of cigarettes, I'd rather spend $150 on a new item than spend 4 hours repairing one that will fail again sooner rather than later anyway. Nothing is made to last anymore, let alone be worth repairing.
Sick of GOOGLES nasty disgusting commercials with foul language at the beginning of everything I want to watch. This isn't over GOOGLE management. You all live in our communities. Sorry friend, good advice. I love learning new things like this.
Sorry to hear that rubbish is being put over my videos. I have been very careful to go through RUclips ads to ensure nothing rude, vulgar or political gets put on my ads, but it seems I don’t have the final say? Glad you enjoyed the video nonetheless :)
Hi, I would only make one suggestion, perhaps the next time you open up a small carb. or similar item like this, could you zoom in closer for better detail on what your doing.😁😁 Otherwise this was an excellent video and very interesting, I'm sure to many including myself. Any DIYer, I'm sure has at one time or another ventured into the unknown world of a small moter. It;s foreign territory for many and you've helped alot. Thanks much mate!
I have had to replace a carburettor on some lawn equipment because the reed valve was leaking which was causing the engine to bog down &: flood, replacing it with a $16 carburettor from China was the fix since it was cheaper to replace it. I was caught out with a cheap & nasty carburettor which I bought from a Melbourne seller on eBay in Victoria so I ordered a $30 AUD carburettor from a seller which was based on the Central coast of New South Wales because it was an urgent repair. The other carburettors main Reed valve was just held in by Loctite which got eaten away by fuel which caused the hedge trimmer to bog down & flood as well because fuel leaked past the check valve. So just be careful when buying lawnmower parts from a Muscat online !
Hey mate :) Shaun has been excellent to me when I use him, but aftermarket are always hit and miss. Did you reach out to him? The couple of times I had any issues his customer service was impeccable :)
Thank you sir. This is the difference between a true mechanic and a fitter! I have a 50cc petrol post driver suffering just like this. I did buy a replacement carb, but having boxes of multiple neoprene O rings, I will take it apart and replace this O ring doing the tests you recommend. I use it for repairing the 100mm 10 foot deer fencing poles and it only idles with the choke on, I have to place it over the pole which is already 2 foot into an auger drilled hole, then flick the choke off and catch it with the accelerator. Sometimes it stalls out which is a pain because it's pretty heavy to take up the ladder and place over the pole. It would be awesome to get it working as it should, it was never right from new.
Mega I just happened to start your vid accidentally with soapy washing up finger, I had these faults on a long gone machine B4 Utube lol brilliantly explained ❤
IVE BEEN A AUTOMECHANIC AND SMALLENGINE MECHANIC FOR OVER 40YEARS AND I NEVER KNEW ABOUT THIS ACCELARATOR PUMP CIRCUIT PROBLEM ,THANK YOU SO MUCH ,IM 65YEARS OLD BUT ALWAYS LEARNING NEW THINGS THANK YOU SO MUCH FOR SHARING YOUR KNOWLEDGE,NOW I KNOW WHY SOME OF THOSE CARBS HAD THESE PROBLEMS AND I DIDNT KNOW WHAT WAS WRONG
What a really careful and helpful video. As an American, I don't know how he can speak the whole time while showing his teeth. But, it's an excellent video. Thanks.
Funny thing about "phillips" heads,Overhead Garage doors used to use a fastener that looked phillips but was not,I took a number two phillips and ground the tip down enough to where it would seat properly for removal. Torn out and replaced lots of those doors with my modded bit.
Rule number one, Never work outside on a tree stump, if you drop a small part then say goodbye to it, a clean bench and floor inside is a must when working on small parts ! Trust me, I’ve been there !
Great video never thought about that piston before always thought it was the fuel demand diaphragm getting stiff over time that would create the problem.
I always do my best to do all this over as clean and flat cloth/towel, something light colored so any parts that fall or fly out are captured. Otherwise they are lost in the dirt.
@VintageEngineRepairs I got one only a year old echo. I've cleaned and serviced the carburetor but will still only run when full choked and even then it only starts if you hold the throttle at full and runs abt half power. The bulb is good I've been through it completely new spark plug and even cleaned the spark arrester
Walbro and Zama are two popular, carb brands, on 2 - cycle stuff. Stihl, uses the one, in this video, at 3:05 Time. Where both diaghrams, are in the top ; just under the squeeze bulb. Other carbs, have one diaghram, on the bottom. Usually a small plate , with an indentation, and 4 philips screws. Same idea, just on the bottom of the carb. I need to order one, each for a Stihl tiller, (43 cc i thing engine ) and an Echo weed whacker - Walbro carb on it. Thank - you, Mr Vintage for teaching us....
Blah Blah Bah just replace the carb it is cheap!! if you replace that one part then something else goes?? No just replace the carb less headaches more time cutting 🙂
Spoken like a true boy. I'm not sure what brands of machines you own, but the carbs for my stuff are far from cheap unless you're referring to the Chinese junk on Amazon. If you have a commercial machine and toss the OE carb out for one of those, you are screwing yourself. Actual men take time to fix their equipment. $3 and 15 minutes to fix a part is time better spent than $20 and 10 minutes slapping garbage on. You'll be replacing that cheap carb over and over and they never stop working when it's convenient to fix. Blah blah, I'm sorry you didn't have a dad that taught you better, I really actually have pity for you, but you have every resource you could ask for and you obviously don't have any interest in caring to improve, that's also sad because it would be great if you'd produce children that don't act like entitled brats. Society has too many.
@@theamaturepro First of all Boy!! you need to read?? Because I have been through the pain staking fixes just to have to shortly fix it again?? This can be a big waste of time!!! fixing other problems that occur on the carb? getting a replacement carb is a time saver and also you do not have to worry when the next time it will break down!! work smart? This gives you time for more important things like making money or fixing other things. Also now you have 2 carbs and now you can cannibalize from one to another if you need too?? Brands I have owned Husqvarna/Stihl/Homelite/Poulan/Champion I do like the Stihl the best from this list. Spoiler alert what is not made in China? If you look closely all the parts on that carb are made in China LOL Also 2 bolts the new carb is on easy peasy no time wasted 🙂
Bloody hell. Just got a bit of a wake up. I didn't realise you're catering to the American market. Went to order a vac pump, came up as $79. At checkout it was $174. Glad i didn't just hit the button and go for it. I understand the situation you're in, but it's not all about America dude.
It will redirect you as it did. If I did links to every product in every country it would be endless. The mityvac is a professional tool, this may be more in keeping with your budget and if you like, copy and paste the name of it into the country you are using Amazon in and it will come up with an alternative - just make sure it’s does both vacuum and pressure :) amzn.to/3Q6C1ix
@@VintageEngineRepairs all good mate. Just thought that seeing as you're in Perth, Western Australia, i thought the links would be for the Australian Amazon. I like the mityvac, ill hunt one down. Cheers mate. Nice one
@@VintageEngineRepairsI miss the purge on anything that doesn’t have it especially a big saw without a compression release that you have to keep pulling the rope till it pumps the fuel up.
Sí ese problema que está mostrando que se presenta en ese carburador zama lo hace un carburador walbro qué problema revisaré en ese carburador walbro gracias saludos profesor
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If this video helped you, please consider clicking on the THANKS button above to support my channel 🙌 and don’t miss this video on other areas that a carburetor can leak! ruclips.net/video/PsG23Xj1XCY/видео.html
BRILLIANT! Thank you!
Bought a new carburetor and it didn't solve the problem. Gave up and ditched the unit.
Thank you Tom for another excellent and highly informative video. As always, your explanations are clear and concise and your camera work, sound and editing are second to none. You should be very proud of your work.
Thank you!! I really appreciate the kind words and feedback :)
Another brilliant video thanks Tom. It’s great that you don’t rush through the explanation of how things can work. I especially appreciate the way that you tell us what not to do and how to avoid rookie errors. Well done 👌🏻
Thank you mate :) I really appreciate the concise and kind feedback!!
Couldn't have said it better myself. Thanks heaps Tom. Such a helpful video
Nice Tips 😀👍🏼
Thank you Chris!
👍👍👍 Brilliant. Thank you
You’re welcome :)
If you always use the rec stihl 2stroke oil you prob wont have these issues for a lon long time if ever they dont rec that oil for just any reason it protects the rubber and brass aluminum parts from wear throughout the entire pice of equipment aka read your owners manual sthil strictly warns and also voids your warranty if you use cheap 2 stroke non approved lube
That’s simply not true, in fact Stihls 2 stroke synthetic oil is actually very low quality - JASO FB rated. In fact it’s one of the worst you can buy! There are far many more better oils that offer cleaner burning and more affordable.
These carbs are super cheap,I just replace the whole unit.
You can, but Chinese clones aren’t reliable like oem so I save every one I can
“A carburetor fix many mechanics don’t know”…yea, it’s called throw it in the trash and swap it for a throttle body and fuel injectors.
And then you can enjoy the rewards of having to pay silly amounts at your local mechanic because the manufacturer doesn’t allow users access to the software - a stihl 500i sounds right up your street ;)
Thank you for teaching, an old dog new tricks. I am a 73-year-old retired engineer, who has tinkered with engines and all things mechanical & electrical ever since I was eight years old. Very grateful to my Father, who allowed me to fail and learn from failure.
I even owned an original McCulloch chainsaw, which was a beast to keep running, but 20 times faster than an ax. I still fix my own carburetors and a lot of carburetors for other people. But like others, I never knew about the accelerator pump on the small engine carbs. Again, many thanks !!
You’re very welcome! I’m glad you enjoyed it :)
Extremely useful tutorial, accurate and concise. I wish more presenters were like this. BRAVO!
Thank you! Much appreciated :)
Never had a clue this was a accelerator pump. Awsome stuff.
Glad you enjoyed the video :) thanks for watching!
I didn't know these little carbs had one....knew they were on automotive carbs but not these little guys.
Very useful information. I’ve always wrestled with small engine carbs .
Same here, magically nobody bother to mentioned it. Great vid, thanks.
So at 72 years old and a retired small engine mechanic, I’m now just learning of a JIS screw head! Best kept secret in the world! I’ve always just used Phillips.
Oh wow! Just goes to show, you are never too old to learn something, that’s great :)
JIS
Japanese Industrial Standard
I agree, I never heard of that, but alllll them screw head's I've trashed just popped in my head... LMAO
Purchased Vessel JIS screwdrivers about 2 years ago. Now my go to screwdrivers. Nothing comes close to their performance.
Japanese are humble stating JIS their industrial standard. Anyone elsewhere their standard IS glue ,pop rivets ,cable tyes and one piece non fixable cast plastics for everything .
Going to add this to my ever growing knowledge of small engine carbs. Great stuff, thanks man.
Thanks for the kind words :) glad you enjoyed it!
Excellent info. I would venture to say not many people know about that pump and o-ring.
Thanks Jim! I hoped it would be new to many, it’s rarely discussed and even less shown how to repair. For 20 cents and a few minutes, it could save a lot of frustration and money!! :)
I love the specialized info that is available here...and the gutsy way that Tom removes tiny parts from a carb on a tree stump! I always use a work bench and a white rag to make things easier to see!
Thank you for the kind words, I really appreciate it :) You are doing it just right, clean, tidy space on a clear surface!! Well done!
Man, I’ve owned my lawn service 36 years. Prior to the introduction of ethanol fuel I rebuilt more than 50 zama cards on stihl 2 stroke lawn equipment. I started having problems with welch plug sealant loosening up and allowing an internal leak between a couple of the passages. I became disappointed and just started buying Stihl OEM carbs I feel lucky to have lived back when it was a black art to tinker with carburetors. And honestly…..I just threw away at least 100 carburetors that I had replaced after I quit rebuilding them.
Crazy! Knowing how to is always useful :) thanks for watching!!
Stihl carbs aren’t cheap. I have a couple laying around from replacements also.
Sounds like a weekend project.
See if I can get them running again.
So some of the accelerator pump carburetor models have a metal plug pressed into the top of the 3rd bore. Getting that plug out can sometimes be tricky as you have to remove the throttle shaft first and then hold the pump piston down while using an angled pick to drive the cap out.
Also it is worth noting that usually if you look at the pump piston you'll see the side of it is scored up badly and that scoring is transferred to the bore which is what tears up the o-ring. The way the piston is operated the force applied to it isn't straight down, it's off center and as such the bore gets ovaled out and even with a new pump piston they usually don't go for very long before developing another vacuum leak in that area.
I always recommend replacing an accelerator pump model carb once the pump/metering gaskets are used up.
Thanks for watching and sharing 👍👍
What a excellent information video Tom👍, i can see a few small engine repair guys checking through there old carb boxes 😂
Thanks Nev! Hahaha yes!! Hopefully a new repair they can put to use on the old carbys in a box :)
Always good stuff here👍🏻
I always tell everyone, 90% of the time, it’s the carb giving the issue.
Thanks mate :) much appreciated!
Today I learnt the difference between JIS and Phillips head screws and how to identify them.👍
Awesome :)
I am still using the same Husqvarna Rancher 44 and 61 that I bought in the 80s when they made them in Sweden . Thanks for explaining the carbs I have rebuilt them carefully and they still work quite well .
I always keep the extra parts included in the rebuilding kits and they can be used for repairs if you punch new holes where they don't match your carburetor .
That zip lock bag of extras is a treasure .
👍
Bought a new carb for £6 ..... but good to see you fix this anyway 👍
You can :) but always best to save the oem one wherever possible. This process is easy, only takes 5 minutes to do and costs just 20 cents for the o-ring (I keep 20 or so of all 3 sizes on hand).
Wow!!!! Thank you for the deep dive on this exquisite, delicate, intricate clockwork fix. Cheers man!!!
You’re welcome :)
This was the best and most educational video I've seen in a long time!! wow thank you! My Ryobi 4 stroke weed eater is now giving me issues after 4 years and it bogs like crazy, also has lost power so much! Even at full throttle it barely does much....now I know what to do! Thanks again your videos are so helpful! 😀cheers from Canada
Thank you for the kind words!! I really appreciate it :)
Ive rebuilt carbs for 50 years. If the o-ring is shrunk the diaphram is puckered also. Most carbs can be purchased new for $10-$20. I haven't done a carb job in years. Not worth wasting all that time.
I can do a carb kit and acc pump in just a few minutes for a couple of dollars, but of course ymmv and we can’t get carbs that cheap out here. Not to mention aftermarket is very unreliable.
Unless you get that extra hour of pay! 😉
Next level tutorial, Sir, about a subject few of us knew about!! One thing, though! You spell CARBURETTOR with an E, yet pronounce it with an A! Is this aimed at your northern market, or how your Dad taught you?
It’s probably because I spend too much time around my American friends, it’s annoying, even to me 🤣 thanks for the kind words :)
Hands-down one of the top three best videos I've seen on RUclips in regards to a two-stroke carburetor repair. I honestly can't wait to watch more of the videos that you have and you sir just made a subscriber out of me with just one video. Not that it matters Terribly to you or anybody else in particular but I can count on 2 hands the number of times a channel/content maker on RUclips managed to get a subscription out of me with just one video :) you earned it IMHO and the only thing I'm disappointed about is the fact that my lunch break is over in a couple minutes and I will have to wait until I get home from work to see what other topics you cover and watch some more of your videos!! 🎉
Wow such a lovely comment, thank you! I sent a screen shot to my family 🤣👍 so pleased you enjoyed it that much! It makes the time and effort all worth while when people like yourself get value and enjoyment out of them! Thanks again!!
Now I want to go through my box of dead carbs and see if this was the problem with some of them. Thanks Tom. 🙂
Awesome mate :) once you’ve done it a couple times it takes just a few minutes - quicker than a carb clean and rebuild!!
Good deal brother 👍🏼
Great video Tom. Now I have a bag of those tiny o-rings to help out and fix the issue!
Thanks Ken :) yes mate spot on!
Brillliant, I have two of those carbs one on chainsaw the other on hedge trimmer, both with those symptoms. Pulled my hair out on both but as I have alternatives have put off buying new carbs . You have given me an avenue to investigate that I wasn't aware of. Mind you at the price of those carbs maybe I'll just swap them anyway,
Glad you enjoyed the video!
Excellent information and explanation. I sure wish I had seen this video a couple of months ago.
I had to replace a throttle shaft due to a difference in the cable linkage. I found the pump quite by accident when I removed the shaft. Only thing is I did not see a screen. It all worked in the end though. Also good tip on securing the spring.
Secondly I didn’t know that the butterfly’s were slightly oval. I recently fought, and lost, to get one back together. I ended up buying a new carb.
Cheers Tom
Thanks for the kind words :) sorry to hear of your struggles, but pleased you enjoyed and found the video informative!
Nice tutorial Tom, I have been using the oil trick for a few years it works well. I sometimes do the same for finding leaks on two stroke intake, crankcase and barrel base gaskets.
Awesome mate :) yes I tend to use 2 stroke mix as it’s thinner for seals, but same concept! Thanks for watching!
I did this to my Ryobi Chainsaw and it completely fixed the bogging issue! Thank you so much for this!
Awesome!!
I've worked at a small engine shop for several years. I have read dozens of repair manuals, taken brand certification tests, and spoke to the other techs I work with. Yet, I have never been told about this or showed this before. I cannot wait til my next "problem child" comes along so I can try it. THANK YOU.
You’re very welcome :) glad it was useful!
Excellent information!! This confirms an issue I've been having!! But just picked up ne carb today believe or not!! Ill strip the other and check it out for curiously if nothing else. Thanks again!!
You’re welcome :)
Hello! I love your videos! They learn me much. Can you show how to service a Walbro WY carb,please? Have problems with one. Thanks!
Hey thanks! The wy is a rotary carb and I have one already :) ruclips.net/video/OXUvTh80_TU/видео.htmlsi=V7MshRyKWPcFZK8i
Excellent as always. This channel is a truly unique source of important knowledge.
Thank you! I really appreciate it :)
What was the rebuild oil you were using? Great videos, very nicely done much appreciated!
From memory it was actually 3 in 1 oil, but anything will work. 2 stroke oil would be better as it’s thicker :)
I couldnt find anyone that could supply a new oring or piston for a C1S Zama so i just plugged the bore with JB weld and drilled the second idle progression hole slightly bigger. Saw runs great now but does use more fuel
Nice fix!
I'm wondering if this is the problem I have. I have a leaf blower and a chainsaw that won't run right. I've cleaned the carb out on both, and changed parts too.
Do the oil test over the 3rd hole :)
Yea I'm buying a new one for less $40 full carb kit replacement
You can do, I prefer to repair OEM than just be a parts swapper.
Mabe but I also had this problem with my chainsaw I so sent it to the shop and it was fixed for a short time then problems returned. An old mechanic friend of mine then showed me the problem the shop had lazily just adjusted the throttle and idle screws but the problem was the diafram had a hole so small i needed a magnifying glass to see it. Changed it had to reset to throttle and idle screws to factory settings (idiots) then ran like new.
Glad you got it sorted :)
Use ONLY high octane no alcohol gas from day one.
I agree about no alcohol! I use the lowest octane personally as none of my engines have been modified to run higher compression or enough ignition advance to warrant higher octane.
I find that it is the pinhole tube that goes from the fuel float reservoir to the bottom of the venturi air valve is most problematic. If you don't drain the gas or leave it over the winter and try to start up in the spring, residues or varnish plugs up that tube, therefore no gas gets in the venturi.
Ah yes, the check valve in the main and idle drillings. They are normally very reliable, but I don’t have ethanol in my fuel, that may be making things worse for you?
Use a "Reed Phillips" craftsman.
Can you still buy them?
you are truely guru of 2 stroke engine, thanks a lot.
You’re welcome! Thanks for the kind words :)
Thats why i only run stihl approved lube
Stihl oil is not a good oil. Look into the JASO FB rating.
And i dont wor on my stihl equipment much!
The oil makes no difference.
great vid . im going to try this little hack right now.
Thanks!
To me, 2024 most useful tutorial. Thanks ever so much! Saves so much energy and frustration too! Hi From Réunion Island.
How kind, thank you! Glad you enjoyed it :)
Excellent clear advice. Bravo Tom.
Thank you John!!
Need fuel injection to bye bye walbro
You can haha, I’ll take a carburetor any day :)
Amazing! Thank you so much.
You’re welcome :)
This video popped up at random and there is some great knowledge about how these little carbs work guess I hit the lottery on extra knowledge I didn’t know about.. thank you for sharing your knowledge
You’re welcome :) glad you enjoyed it!
When you can buy a BRAND NEW Walbro or one of the 20 different clones of them for under $50, why would anyone bother repairing one? I have pulled many of these apart over the last 40+ years, and they NEVER work the same again after reassembly. 99% of Go Kart drivers have a box full of these, for all different tunings to suit all different tracks in all different weather conditions. The guy's who are consistently on the podium aren't going to waste time pulling a $50 carby apart to make it worse than it was. The rebuid kit is almost as much as a new carby anyway. I have a box full of them for my petrol engines on RC aircraft and petrol powered gardening tools. If your having issue's, the simplest fix is to replace, if you mess up the pop off tension or damage a jet or bend the delicate float arm or whatever, then your carby is stuffed anyway.....all you need to do is lose ONE screw, spring or washer and your carby is garbage aswell.
Thanks for watching
A box of O-rings is lighter to carry, but rebuilding stuff requires skill and patience. And if you learn how to do it well, you can do tiny mods to increase the gas flow and performance too. But it's harder!
That's the difference between a real mechanic, and a fitter IMHO sir.
@@chriswalker4272 very well said 👍
@@chriswalker4272 Rebuilding one of these is simple enough, as is re-jetting. but 90% of people that own a chainsaw or other petrol powered machine either don't have the knowledge or skills required, the patience to do it or the tools to do it correctly, so my comments are true. I have spent more time in the last 40 years reassembling these carbs than I care to admit, and it is simply a time consuming annoyance that can be fixed much faster and easier by replacement. We live in a disposable world more than ever, somethings are simply NOT WORTH FIXING anymore. A cheap 40" bar chainsaw costs less now than a carton of cigarettes, I'd rather spend $150 on a new item than spend 4 hours repairing one that will fail again sooner rather than later anyway. Nothing is made to last anymore, let alone be worth repairing.
“C-A-R-B-U-R-A-T-O-R”. You’re welcome.
Such great articulation
Thank you!
Verry detailed and professionel 👍👍
Thank you! I appreciate it :)
Sick of GOOGLES nasty disgusting commercials with foul language at the beginning of everything I want to watch. This isn't over GOOGLE management. You all live in our communities. Sorry friend, good advice. I love learning new things like this.
Sorry to hear that rubbish is being put over my videos. I have been very careful to go through RUclips ads to ensure nothing rude, vulgar or political gets put on my ads, but it seems I don’t have the final say? Glad you enjoyed the video nonetheless :)
You are a gifted Teacher!!
Thank you!
Hi, I would only make one suggestion, perhaps the next time you open up a small carb. or similar item like this, could you zoom in closer for better detail on what your doing.😁😁
Otherwise this was an excellent video and very interesting, I'm sure to many including myself. Any DIYer, I'm sure has at one time or another ventured into the unknown world of a small moter. It;s foreign territory for many and you've helped alot. Thanks much mate!
Thank you for the feedback :) much appreciated!! Glad you enjoyed the video!
I have had to replace a carburettor on some lawn equipment because the reed valve was leaking which was causing the engine to bog down &: flood, replacing it with a $16 carburettor from China was the fix since it was cheaper to replace it.
I was caught out with a cheap & nasty carburettor which I bought from a Melbourne seller on eBay in Victoria so I ordered a $30 AUD carburettor from a seller which was based on the Central coast of New South Wales because it was an urgent repair.
The other carburettors main Reed valve was just held in by Loctite which got eaten away by fuel which caused the hedge trimmer to bog down & flood as well because fuel leaked past the check valve.
So just be careful when buying lawnmower parts from a Muscat online !
Hey mate :) Shaun has been excellent to me when I use him, but aftermarket are always hit and miss. Did you reach out to him? The couple of times I had any issues his customer service was impeccable :)
Thank you sir. This is the difference between a true mechanic and a fitter!
I have a 50cc petrol post driver suffering just like this. I did buy a replacement carb, but having boxes of multiple neoprene O rings, I will take it apart and replace this O ring doing the tests you recommend. I use it for repairing the 100mm 10 foot deer fencing poles and it only idles with the choke on, I have to place it over the pole which is already 2 foot into an auger drilled hole, then flick the choke off and catch it with the accelerator. Sometimes it stalls out which is a pain because it's pretty heavy to take up the ladder and place over the pole.
It would be awesome to get it working as it should, it was never right from new.
Thanks for the kind words, and I agree with you!
Mega I just happened to start your vid accidentally with soapy washing up finger, I had these faults on a long gone machine B4 Utube lol brilliantly explained ❤
Ahaha!! That’s hilarious, I’m glad you did 🤣👍
IVE BEEN A AUTOMECHANIC AND SMALLENGINE MECHANIC FOR OVER 40YEARS AND I NEVER KNEW ABOUT THIS ACCELARATOR PUMP CIRCUIT PROBLEM ,THANK YOU SO MUCH ,IM 65YEARS OLD BUT ALWAYS LEARNING NEW THINGS THANK YOU SO MUCH FOR SHARING YOUR KNOWLEDGE,NOW I KNOW WHY SOME OF THOSE CARBS HAD THESE PROBLEMS AND I DIDNT KNOW WHAT WAS WRONG
Glad you enjoyed it, thanks for the feedback!
What a really careful and helpful video. As an American, I don't know how he can speak the whole time while showing his teeth. But, it's an excellent video. Thanks.
Glad you enjoyed the video!
Funny thing about "phillips" heads,Overhead Garage doors used to use a fastener that looked phillips but was not,I took a number two phillips and ground the tip down enough to where it would seat properly for removal.
Torn out and replaced lots of those doors with my modded bit.
I love modifications to fix a problem, good job!! :)
Another good one Tom. If you don’t teach at TAFE you should, although I spose you already are by doing uTubes without all the other crap.
Thank you :) haha that’s very kind!
Rule number one, Never work outside on a tree stump, if you drop a small part then say goodbye to it, a clean bench and floor inside is a must when working on small parts ! Trust me, I’ve been there !
I have lost a few bits, but I’m pretty handy with a magnet LOL. Ideally I’d be in my workshop, but no space to film, lighting is bad etc.
Great video, now I think I found the root cause my fathers' old stihl trimmer bugs and won't take gas.
Awesome!
Such a smooth, detailed and to the point video: Very good. Subscribed, and thank you.
Thank you :) I really appreciate the feedback!
Great video never thought about that piston before always thought it was the fuel demand diaphragm getting stiff over time that would create the problem.
Both :) lots of issues you can have in different parts of the carb can give you similar symptoms, but you build up an idea of which to go for first!
I always do my best to do all this over as clean and flat cloth/towel, something light colored so any parts that fall or fly out are captured. Otherwise they are lost in the dirt.
Very well said, I couldn’t agree more! Outside on grass and a stump is the worst, but it allows good lighting and space for filming 🤣
Great video thanks for sharing your knowledge . I learnt something new today . 🇦🇺
You’re very welcome! Thanks for the kind words :)
It’s great to see you again. I used to watch your spoon videos and bought your sharpening system. 😊
That’s awesome!! Glad to have you here :)
👍👍
👍
Good information. I added you to my subscribed list. Thanks Tom
Awesome, thank you!
A teaspoon of Lucas fuel injection cleaner in the gas can helps reduce the jets clogging between jobs .
👍
Excellent 👍 thank you.
Cheers 🥂
You’re welcome :)
Learned about the jis screwdriver, Thank you
You’re welcome 👍
I got one you just may help me with
Sure, what’s up?
@VintageEngineRepairs I got one only a year old echo. I've cleaned and serviced the carburetor but will still only run when full choked and even then it only starts if you hold the throttle at full and runs abt half power. The bulb is good I've been through it completely new spark plug and even cleaned the spark arrester
Have you tuned the carburetor?
@@VintageEngineRepairs yes
Walbro and Zama are two popular, carb brands, on 2 - cycle stuff. Stihl, uses the one, in this video, at 3:05 Time. Where both diaghrams, are in the top ; just under the squeeze bulb. Other carbs, have one diaghram, on the bottom. Usually a small plate , with an indentation, and 4 philips screws. Same idea, just on the bottom of the carb. I need to order one, each for a Stihl tiller, (43 cc i thing engine ) and an Echo weed whacker - Walbro carb on it. Thank - you, Mr Vintage for teaching us....
i think, engine....
Glad you enjoyed it!
Damn … you are a great at explaining things. Thank you.
Thank you!
Very helpful now I can save a few carbs rather than replacing
Absolutely :)
Brilliant video, useful and very well explained
Thank you! :)
Blah Blah Bah just replace the carb it is cheap!! if you replace that one part then something else goes?? No just replace the carb less headaches more time cutting 🙂
Spoken like a true boy. I'm not sure what brands of machines you own, but the carbs for my stuff are far from cheap unless you're referring to the Chinese junk on Amazon. If you have a commercial machine and toss the OE carb out for one of those, you are screwing yourself. Actual men take time to fix their equipment. $3 and 15 minutes to fix a part is time better spent than $20 and 10 minutes slapping garbage on. You'll be replacing that cheap carb over and over and they never stop working when it's convenient to fix. Blah blah, I'm sorry you didn't have a dad that taught you better, I really actually have pity for you, but you have every resource you could ask for and you obviously don't have any interest in caring to improve, that's also sad because it would be great if you'd produce children that don't act like entitled brats. Society has too many.
@@theamaturepro First of all Boy!! you need to read?? Because I have been through the pain staking fixes just to have to shortly fix it again?? This can be a big waste of time!!! fixing other problems that occur on the carb? getting a replacement carb is a time saver and also you do not have to worry when the next time it will break down!! work smart? This gives you time for more important things like making money or fixing other things. Also now you have 2 carbs and now you can cannibalize from one to another if you need too?? Brands I have owned Husqvarna/Stihl/Homelite/Poulan/Champion I do like the Stihl the best from this list. Spoiler alert what is not made in China? If you look closely all the parts on that carb are made in China LOL Also 2 bolts the new carb is on easy peasy no time wasted 🙂
I prefer to repair oem rather than replace with AM.
@@VintageEngineRepairs All parts made in China FYI
@@thegrantdanielsband I know this, but there is a big difference between oem and am made in china…
Bloody hell.
Just got a bit of a wake up.
I didn't realise you're catering to the American market.
Went to order a vac pump, came up as $79.
At checkout it was $174.
Glad i didn't just hit the button and go for it.
I understand the situation you're in, but it's not all about America dude.
It will redirect you as it did. If I did links to every product in every country it would be endless. The mityvac is a professional tool, this may be more in keeping with your budget and if you like, copy and paste the name of it into the country you are using Amazon in and it will come up with an alternative - just make sure it’s does both vacuum and pressure :) amzn.to/3Q6C1ix
@@VintageEngineRepairs all good mate.
Just thought that seeing as you're in Perth, Western Australia, i thought the links would be for the Australian Amazon.
I like the mityvac, ill hunt one down.
Cheers mate.
Nice one
No worries :) thanks for the feedback and fully understand! Cheers 👍👍
piss poor design diaphram carb, stupid pump/primer bulb. old chain saw carbs had choke plates and much better design
These use chokes too, the purge is to remove the air from the system. I don’t like the purge much, but they function well, especially using oem parts.
@@VintageEngineRepairsI miss the purge on anything that doesn’t have it especially a big saw without a compression release that you have to keep pulling the rope till it pumps the fuel up.
what every real machinic does know
Thanks for watching
As always, so AWESOME !
🙏🏻💖🙏🏻
Thank you!!
Great Video ,and yes JIS does exist
Thanks for watching :)
BRILLIANT! Thank you!
You’re welcome!
Sí ese problema que está mostrando que se presenta en ese carburador zama lo hace un carburador walbro qué problema revisaré en ese carburador walbro gracias saludos profesor
Yes walbro have accelerator pumps too :)
Disculpe si no sería mucho la molestia la presentaría en un video gracias saludos@@VintageEngineRepairs
Great video Tom, well done.
Thank you Trains! Much appreciated mate :)
Very good. Thank you.
Thank you :)
This man knows his stuff!
Thank you :)
Excellent video
Thank you Jim!
Thanks, Tom.
You’re welcome :)
2:55 is the trick
Absolutely! I hope who ever mentioned it to me will let me know :)
Excellent.
Thank you :)
Thanks!!!😊❤
You’re welcome!!