A Carburetor Fix Many Mechanics Don’t Know!

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Diagnosing and repairing both 2 stroke and 4 stroke small engine carburetors is something even experienced mechanics can have difficulty with. Here I show a common fault that few people know about and how to repair it!
Engine bogging and stalling, hard starts and even your purge bulb sucking air are all symptoms of the accelerator pump failing! This problem affects both name brand carburetors from Stihl, Husqvarna, Echo as well as after market copy carburetors or clones. This video will save you time, money and frustration by teaching you how to repair carburetors found on your chainsaws, weed eaters, lawn mowers, leaf blowers and many other other small engines at home without any specialist or expensive tools!
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00:00 Small engine carburetor repair.
00:50 What is carburetor bogging and how to overcome it.
01:39 The accelerator pump and how it works.
02:32 Purge bulb won't fill with fuel.
02:52 Diagnosing an accelerator pump failure.
03:25 Replacing a carburetor - it is worth it?
03:34 Disassembling the carburetor.
04:00 Essential tool to service a carburetor.
05:59 Where to buy replacement parts for a carburetor.
06:18 Rebuilding a carburetor with new parts.
#carburetorrebuild #stihlcarburetor #husvarnacarburetor #primerbulb #enginerepair

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2 июл 2024

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Комментарии : 99

@VintageEngineRepairs 8 дней назад

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! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-PsG23Xj1XCY.html

@WECB640 5 дней назад

Extremely useful tutorial, accurate and concise. I wish more presenters were like this. BRAVO!

@VintageEngineRepairs 5 дней назад

Thank you! Much appreciated :)

@RMosher11 5 дней назад

Going to add this to my ever growing knowledge of small engine carbs. Great stuff, thanks man.

@VintageEngineRepairs 5 дней назад

Thanks for the kind words :) glad you enjoyed it!

@justinanderson9280 5 дней назад

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 👌🏻

@VintageEngineRepairs 5 дней назад

Thank you mate :) I really appreciate the concise and kind feedback!!

@tomrogers9467 15 часов назад

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.

@VintageEngineRepairs 14 часов назад

Oh wow! Just goes to show, you are never too old to learn something, that’s great :)

@IndianaDoug 5 дней назад

Always good stuff here👍🏻 I always tell everyone, 90% of the time, it’s the carb giving the issue.

@VintageEngineRepairs 5 дней назад

Thanks mate :) much appreciated!

@brianb5779 5 дней назад

Never had a clue this was a accelerator pump. Awsome stuff.

@VintageEngineRepairs 5 дней назад

Glad you enjoyed the video :) thanks for watching!

@sweber1985 2 дня назад

I didn't know these little carbs had one....knew they were on automotive carbs but not these little guys.

@victorsabatino2185 4 дня назад

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!

@VintageEngineRepairs 4 дня назад

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!

@tinkeringtaylor3053 4 дня назад

What a excellent information video Tom👍, i can see a few small engine repair guys checking through there old carb boxes 😂

@VintageEngineRepairs 4 дня назад

Thanks Nev! Hahaha yes!! Hopefully a new repair they can put to use on the old carbys in a box :)

@sweber1985 2 дня назад

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

@VintageEngineRepairs День назад

Thank you for the kind words!! I really appreciate it :)

@SimonE-et2xg 5 дней назад

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.

@VintageEngineRepairs 5 дней назад

Thank you!! I really appreciate the kind words and feedback :)

@RHRH235 3 дня назад

You are a gifted Teacher!!

@VintageEngineRepairs 3 дня назад

Thank you!

@ChrisR 5 дней назад

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.

@VintageEngineRepairs 5 дней назад

Thanks for watching and sharing 👍👍

@robbyclark7657 2 дня назад

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.

@VintageEngineRepairs День назад

Crazy! Knowing how to is always useful :) thanks for watching!!

@cedhome7945 5 дней назад

Bought a new carb for £6 ..... but good to see you fix this anyway 👍

@VintageEngineRepairs 5 дней назад

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).

@jimbrewer2893 5 дней назад

Excellent info. I would venture to say not many people know about that pump and o-ring.

@VintageEngineRepairs 5 дней назад

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!! :)

@KensSmallEngineRepair 5 дней назад

Great video Tom. Now I have a bag of those tiny o-rings to help out and fix the issue!

@VintageEngineRepairs 5 дней назад

Thanks Ken :) yes mate spot on!

@beingthere597 5 дней назад

Excellent as always. This channel is a truly unique source of important knowledge.

@VintageEngineRepairs 5 дней назад

Thank you! I really appreciate it :)

@Big_Johns 5 дней назад

Now I want to go through my box of dead carbs and see if this was the problem with some of them. Thanks Tom. 🙂

@VintageEngineRepairs 5 дней назад

Awesome mate :) once you’ve done it a couple times it takes just a few minutes - quicker than a carb clean and rebuild!!

@Big_Johns 5 дней назад

Good deal brother 👍🏼

@EzRay11 3 дня назад

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

@VintageEngineRepairs 3 дня назад

Thanks for the kind words :) sorry to hear of your struggles, but pleased you enjoyed and found the video informative!

@johnashcroft-jones6091 5 дней назад

Excellent clear advice. Bravo Tom.

@VintageEngineRepairs 5 дней назад

Thank you John!!

@TGMForum 5 дней назад

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.

@VintageEngineRepairs 5 дней назад

Awesome mate :) yes I tend to use 2 stroke mix as it’s thinner for seals, but same concept! Thanks for watching!

@riderhard 22 часа назад

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!

@VintageEngineRepairs 22 часа назад

Thank you for the feedback :) much appreciated!! Glad you enjoyed the video!

@markthomas919 День назад

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,

@VintageEngineRepairs День назад

Glad you enjoyed the video!

@johntrainssmith1475 5 дней назад

Great video Tom, well done.

@VintageEngineRepairs 5 дней назад

Thank you Trains! Much appreciated mate :)

@manyhammers5944 9 часов назад

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.

@VintageEngineRepairs 3 часа назад

I love modifications to fix a problem, good job!! :)

@chrischiampo7647 5 дней назад

Nice Tips 😀👍🏼

@VintageEngineRepairs 5 дней назад

Thank you Chris!

@martynhoward4287 10 часов назад

Brilliant video, useful and very well explained

@VintageEngineRepairs 3 часа назад

Thank you! :)

@brianarthur6945 День назад

Great Video ,and yes JIS does exist

@VintageEngineRepairs День назад

Thanks for watching :)

@Jim-ie6uf 5 дней назад

Excellent video

@VintageEngineRepairs 5 дней назад

Thank you Jim!

@gregorytaylor697 5 дней назад

As always, so AWESOME ! 🙏🏻💖🙏🏻

@VintageEngineRepairs 5 дней назад

Thank you!!

@alank616 4 дня назад

Great video thanks for sharing your knowledge . I learnt something new today . 🇦🇺

@VintageEngineRepairs 4 дня назад

You’re very welcome! Thanks for the kind words :)

@plakor6133 День назад

Thanks, Tom.

@VintageEngineRepairs День назад

You’re welcome :)

@jefftheaussie2225 2 дня назад

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.

@VintageEngineRepairs День назад

Thank you :) haha that’s very kind!

@Pete.Ty1 День назад

👍👍👍 Brilliant. Thank you

@VintageEngineRepairs День назад

You’re welcome :)

@justinanderson9280 5 дней назад

Thanks

@VintageEngineRepairs 5 дней назад

Thank you Justin!! :) much appreciated mate 👍

@RussellBooth1977 5 дней назад

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 !

@VintageEngineRepairs 5 дней назад

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 :)

@user-cn3vg3hj2b 5 дней назад

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

@VintageEngineRepairs 5 дней назад

Yes walbro have accelerator pumps too :)

@user-cn3vg3hj2b 5 дней назад

Disculpe si no sería mucho la molestia la presentaría en un video gracias saludos@@VintageEngineRepairs

@mikem5475 5 дней назад

2:55 is the trick

@VintageEngineRepairs 5 дней назад

Absolutely! I hope who ever mentioned it to me will let me know :)

@waynecap5960 3 дня назад

Never use gas for fuel. Use True Fuel.

@VintageEngineRepairs 2 дня назад

We don’t have that here, but motomix is excellent, be it expensive. Were fortunate to have ethanol free in Western Australia :)

@jefftheaussie2225 2 дня назад

@@VintageEngineRepairsI wouldn’t put E10 in anything. Thank goodness we can get unleaded here too although it is crap too.

@tamjarvie6021 5 дней назад

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 !

@VintageEngineRepairs 4 дня назад

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.

@bushratbeachbum 5 дней назад

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.

@VintageEngineRepairs 5 дней назад

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

@bushratbeachbum 5 дней назад

@@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

@VintageEngineRepairs 5 дней назад

No worries :) thanks for the feedback and fully understand! Cheers 👍👍

@shadowopsairman1583 4 дня назад

Proprietary screws should be illegal

@VintageEngineRepairs 4 дня назад

The JIS is actually a superior head, it’s designed not to cam out like Philips. Though I agree, one style for screws and one style for bolts would be nice haha

@jefftheaussie2225 2 дня назад

@@VintageEngineRepairsI didn’t know about JIS and will keep an eye out now for that. Just another tool type to go with the imperial, metric and Whitworth, and all the screw other screw heads.

@user-ni7tg5fg9k 5 дней назад

moooore noooooos😂

@VintageEngineRepairs 5 дней назад

Sorry mate I don’t get it 🤣

@johnbecker5213 3 дня назад

piss poor design diaphram carb, stupid pump/primer bulb. old chain saw carbs had choke plates and much better design

@VintageEngineRepairs 3 дня назад

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.

@jefftheaussie2225 2 дня назад

@@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.