Hidden Carburetor Adjusting Screws On 2 Stroke Weedeaters and Leaf blowers
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- Опубликовано: 29 сен 2021
- Hidden Carburetor Adjusting Screws On 2 Stroke Weedeaters and Leaf blowers
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Easy to follow and thorough step by step tutorials do it yourself (DIY) videos 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, zero turn mower, snowblower, pressure washer, generator or a ride on mower that needs parts installed or replaced, I’m your go-to guy.
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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 #2stroke #walbro 
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Watch my video on why your weedeater is always flooded here;
ruclips.net/video/Q4nndcPd98o/видео.html
I bought a new carb for my trimmer ran two tanks of gas ran fine then next day or so i wouldn't start can't get it started, got spark even put new plug in still no start even put new gas line on any thoughts please thanks
Thank you my friend
💜💜💜
Just want to thank you.. Watching your videos has allowed me to fix things myself. And be more self sufficient!
Your calm unhurried deliberate approach truly facilitates learning this material to a greater degree than with your peers (that is for me). So thank you!
Awesome video Don! I had heard of hidden screws on the Zamas but I have never seen them in such detail.
Very important information to have when working on small engine carburetors.
best explanation of adjustments on this little carb. when removing the barrel throttle there is a small bushing (1.0-1.5mm) that will fall out. It goes on the small pin in the side of the bore and makes the barrel cam up as the throttle opens. If the barrel doesn't rise in the bore as the throttle opens, check for missing bushing. Thanks for the information.
And ,that was the most informative video on hidden carburetor adjustments I've seen. Nice job
By far the best instructional vid I have viewed regarding these little carbs... very well detailed and shot, dony. I have been watching your work for years and can't thank-you enough for your work! Just a quick note for American viewers regarding those little black plastic plugs. They are apparently required to be in place if you are a 'pro' adjuster or you can be fined...this does not apply to homeowners, just business people. Thank-you, dony! You are first-rate!
Plastic caps on carb adjustment. Thank EPA, in the early 80's when most cars had carbs, EPA mandated restricting access to the adjustments which was in some cases a hardened steel cap over the idle mixture screw. It was a lot more fun to get it out. Be glad these plugs are plastic.
Your the greatest Dony boy ! I really like your penchant for exact detail ! 🌞
You explained the procedure very clear and to the point.
I'm very impressed. 2thumbs up!!! Thank you.
Thanks for posting. I knew about the one hidden screw, I didn't realize there were 2 of them!!
Omg I am working on an echo weed eater identical to the one in the video right now. I cleaned the carb and it did not solve the problem ( bogging when throttling up)so instead of gambling on the kit solving the problem, I just ordered a replacement carb. Wish I would have seen this video before I ordered it. I had no idea that the carb had any adjustments nor did I know about the tiny jet inside the little brass thing on the side.
Thanks for a great tutorial!
One of the best and most detailed videos on small machine on the internet bravo!
Thank You. I’ve been watching for 9 years and you have done a great job 👏
I can’t thank you enough for doing this excellent presentation video!!!!
Such a great channel for info!! Thanks so much for showing us this trick👍
Great training . Thanks
Wow! They are really going to great lengths to make things difficult. Thanks for the info.
Yup they don't want the shop guys fixing peoples stuff. they can't be that greedy to keep making things like that
Love your videos very technical. Just what I needed.
Best description of High and Low adjustment
I have a Homelite VersaTool weed Wacker that I bought for 2.50 bucks at a yard sale about 5 years ago. It was manufactured in 2001 with a walbro carb. Never had an issue in 5 years. ..but now I think the diaphragm bought the farm due to age. Thanks for the tips . I know the walbro differs from Zamas carb, but the theory still applies.
Donnie, "U" are a life saver my brother, I thank you so very much for this Video, this has been driving me crazy, replaced 3 carbs on 3 different pieces of equipment and no of them ever ran right, damn I Thank you for your time and knowledge.
Daren'
This video saved me a trip to the Echo dealer---I installed an after market new carburetor ($14.00) and still would not run up to full speed. Made the adjustment noted in this video on the high speed jet and it works just like new---the aftermarket carb did not have the plastic plugs to prevent adjustment thank goodness.
Very informative. Thanks Don.
John 🇬🇧
Thank you !! I watched so many videos but you was the only one that gave me specific details !
Been watching your videos now for a while and wanted to say thank you for all the info along with tips and tricks that you've learned over the years. I have learned a thing at you watching your videos over the years and it has really helped out with some of my saw and small engine repairs. Just wanted to say thank you very much and keep up the good work along with the videos, God bless and be safe out there. John Halverson
thanks John!
Friend, is it wrong to leave the L-nozzle at full speed? Can the saw be damaged through the L nozzle?
Another great video - nice and concise, great presentation and videoing, thanks 👍👌👏
Excellent demonstration buddy.
Thank You for the Awesome information. I really appreciate you for sharing this video with us.
Always the best straight facts… ALWAYS HELPFUL
Thank you for your help. You and another video are the ones with the best explanation.
Dude! I idolize you! Best Carb video I have seen. Thanks!
Yesterday I wanted to adjust my carb on my Toro weedeater and I could not figure out where the screws were. Now I know. Thank you for the information. Great video.
Thankyou for this information. I never knew about this tool or plastic cap over the screws. After learning this I got very angry due to two workshops lying to my face....
Back in 2003 I purchased a rather expensive brush cutter that would never run right and needed to be returned often back to the shop I purchased it from. After the third month of ownership and constant breakdowns they started to charge me a service fee. I lost my temper with everything and just put the machine away for years. Years later I went to another workshop to get answers on why this machine was behaving so badly and they said like the original place purchased the device from the carburettor is "self adjusting" and nothing to tune. Ok sure I purchased a brand new carburettor from them and again the same bullshit all over again. So I just gave up with this unit and went 36v electric.
I now find out there were adjustments and never needed to buy a carburettor at all. I felt I'm surrounded by thieving bustards and can't trust my local repair shops. Iv been tuning my own carburettors since I was a teenager and this damn thing had me beat.
Once again thankyou for the information and help me solving this twenty year mystery
Best video I found that explains the high AND low adjustment 🤙🏻
Great video Don I've done all sorts of work to saw carbs, drilling air bleeds, adding H needle to 3120xp, using micro drills to drill jets etc. But I've really learned something here today, the only zamma barrel carbs I have are on 2 Makita 231T (23cc top handles). And I just thought they were fixed jet carbs. I can't wait to now be able to do some tuning. Great video.
Too Touchy compared to ones w Hi and Lo screws.
Thanks Donyboy! Been needing this and you made it happen. Great content. 👍
have a good weekend Tim!
Thank you sir! Very informative and detailed video.
Great information. Thank you for sharing. ❤️🇨🇦
Simply the best Dony, always informative. Great tutorial...
😊
Hi Donny. Thanks to this vid I was able to find the hidden low speed jet on my German made line trimmer from Aldi and tune it properly !! Many thanks bud. Alex, ex pat Canuck in Australia
Excellent and educational video!
Great video, Don. Very helpful and a practical solution to a common problem on equipment that's a few years old from my experience. Would like your view on using a tach (Mini-Tach or other similar device) to set the adjustment screws. Also if you prefer one tach over another.
Hi. I have tachometer/hour meter on both my lawnmowers. It helps keep an eye on RPM and hours the mowers have done. There are lot's to choose from on Amazon. I paid about 16 UK pounds each and I am happy with them.
Excellent video!
Thank you!
Your video saved me lots of time and money and frustration thanks
Those are nice tips and I have jewelers screwdrivers which should be able to adjust most of those screws and I have not had any problems with any of the trimmers I currently use, but now know what to do to adjust the carburetors. Thanks for sharing those tips and I wish you and your family a great week.
thanks Sidney, have a great weekend!
Yes great info
Thanks
Excellent info as always..... Thank you.
Super video I'm watching from Slovakia.
Awesome! Thank you!
Love to watch your videos…..you’re the best…thank u!!!!!
Wow this was a awesome video to come across. I like your tips a lot!
I had a question for ya , you said to let the 2stroke motor warm up some before making your adjustments. And that makes sense to me. Should you let 2 stroke equipment warm up at all before regular use? I do with 4 cycle equipment but not to much with 2 cycle. I’m sure you know better than anyone that the newer 2 stroke equipment these day’s seems to have a lot more issue’s than the older stuff. At least in my experience. I’m assuming that little jet you expanded with the micro drill bit has a lot to do with it?
I never thought of that or realized that was possible to hone out some. This is the best thing I will see all day on RUclips! Thank you so much for sharing this info!
I will definitely be subscribing to this channel. Real quick one more thing if you read these comments or see this. We run Red Max equipment atleast our weed eaters and blower’s. We have newer equipment and it’s usually the stuff that gives us more issues. I have 3 weed eaters that I kept back for my personal use. I like the older one’s. They are from year 2000 and 2001. Hardly ever have any problems with them at all , year after year. On the newer stuff is it because of that carb jet ? The one you drilled out. I’m assuming they try to lean everything out as much as possible for emissions crap so they make them to small and tight from the factory? Am I on the right track there? There are times I might assume someone didn’t mix the oil in the fuel correctly because we might have a few trimmers start running rough around the same time but that same mixture of 2 cycle oil and premium fuel in my older red max trimmers is just fine. Hey thanks again , you are the man!🍻
Bless you for this vid load of education here thank you thank you thank you
I came here for a different problem but your video was so well done and interesting I watched the whole video. Thanks!
Glad to hear it!
Outstanding Don you do great work thank you!😁
Great Video! Thanks for Sharing 👍
Hello Doni.. I am working on that same carburetor which is on a Echo SRM 225 String Trimmer. This is the first time I've seen this style of carburetor with the hidden adjustment screws. Thank you so much for your video. . I'll be referring to this video tomorrow to see if I can get it to run. I also did a compression test and it's right about 88 psi..
Normally I see this with 110 to 118 psi.
Brilliant video mate. Thanks
Great video will give this a go in the morning 🌄 Thank you
Great video, Don! Thanks. I´ve had a hidden L-screw on a cheep chinese trimmer... After (finding and) removing the black plug it was easy to adjust the carburetor 😉
Greetings from germany, Stefan
greetings from Canada!
Good information to know 👍.
Thanks for the vid Dony, good to know. I replaced the carb on my Echo GT-225, ran fine right out of the box so I assume these carbs are pre-adjusted. Nice to know where those screws are located. 👍👍
They are probably close but every operating environment is different so the carbs should be tweaked.
Very well done, thanks!!
Excellent information!!
Handy to know this. Thanks for sharing.
Great knowledge. You know that my two cycle equipment is old when I think all of them except my chainsaw have not-hidden adjustment screws...
My Echo SRM 225 runs like a BEAST for about 15 minutes and then boggs right out as if "choked"
... if I let it sit for about 20min I can repeat the process however it always seems to "choke" out. She'll usually restart immediately but the moment I hit anywhere near half throttle it starts to choke even though it ran perfectly normal up till then... lower mid-range seem to function but the moment you get anywhere near the high end of the throttle... it just chokes out once it's good and hot despite the fact that it ran normally up till then.
I've replaced the fuel lines, filters, carb, changed the spark plug, checked the spark arrestor screen, same fuel i use in my chainsaw yet nothing works
I build gas RC cars, ride Motor Cross Bikes and have Decades of experience maintaining chainsaws, lawn mowers and all types of gas powered equipment yet I've never seen anything quite like this.
I bought her new and never had a problem for about 7 years of residential use🤔
I bought a echo weed wacker new this spring, it runs well but is pretty laggy, takes a bit to come to life and just seems like it should have better throttle response.
I believe this video gave me all I need to remedy that.
check the muffler spark arrester screen, it may be plugged
It doesn't have a ton of hours on it but I will do that. Thank you
thank you my echo weed eater is realy acting up in the past couple of days its been runing ruff and back firers one,s in a blue moon i will clean carb and ajusted these sqrews
Awesome Donny! Thanks
Thanks again Donyboy
Now that my good sir is some valuable information thanks for sharing 👍
Awesome video thank you
My Zama had a brass plug on both low and high speed adjustments on my echo SRM230. I used a T-10 star drive to get it out. It bites into the brass plug and I just wiggled it out of the throttle shaft. The other high speed was the same.
great vid/info. esp the hi speed hiding spot
Good Info Thanks.
Hey great tips 👍
thanks for the tips
excellent video thank you
Excellent. Thankyou as had similar issue just other day, Great timing :-)
Thank you very much.
Полезное видео! Спасибо!
Thank you!
Awesome. video thank you .
Very detailed vid Don! Great job, thanks for this! Cheers and Happy Thanksgiving!
Thanks, you too!
Good info , thanks
Very good info. 😃🤙
I didn't know this, great video as always. Thank you
Thanks for watching!
Thanks again Sir!
thanks for the info
Hi Don . Been watching and learning from your videos for a few years . Thankyou. On my Echo gt2000, trimmer it seems like Im changing the carb every two to three years. At present the engine runs for about a minute and then dies. Once I prime it again it starts. Ive checked the lines and filter.Why isn't the fuel going into the carb?? Thankyou.
thanks donyboy! you always do the best in explaing a solution.
Very ironic because my neighbor was using his Echo and it was bogging hard every time he pulled the trigger. Great timing and awesome content!
Mine does it at about 20 minutes, boggs under load more and more.
Its a new carb...it still sucks.
Thanks you very much
I recognize the C1Q-S76 carburetor whenever I see it 🤣. I've been into a 250 so many times.
Not all zama rotarys use a slotted screwdriver for the idle adjustment. I have found some require a small single D, as well as a small star or a small pac man.
It would be nice to stick with one style of screw!!! Have to go a buy these little screwdrivers. Ugh!!
One of my straight shaft weed eaters carburetor uses a D splined tool then all my other stuff uses the regular splined tool
Those little micro drill bits are handy to have around
Good video. I needed that information
Glad to hear it
A small drill bit removes the plugs fairly easily also.
The Honda 4 stroke adjustment screw is hidden like the Zama carburetor but makes all the difference in a fully functional trimmer.
Somebody must’ve watched My
Video 👍
That’s what I first done and both ways work
I also watch every video mower mec 1 makes
hy Dony, i tried a little drill to remove the seat of gas arrival and it work verry well, maybe it`s good to for plastic cap on hidden screw ? thank for those good vidéos .
Nice that it's easy to adjust those zama carbs with it on the blower. Unfortunately, I have the Echo PB-250 with the Walbro carb where one can't do that. Pain in the arse that one is!
When i do a tune on a carb " first i make sure no clogged fuel filter , right mix, plug gap, clean spark arrestor , possible carbon on exhaust port , older equipment" some are gummy bears" run slow allow for heat expansion rev warm " dial in the carb" lastly, weed eaters line at proper length so" under load, braaap braaat" max tune with 91" octane & 3 oz per gal especially being smokeless & ashless , remember when Castrol pre mix smelled almost as good as BBQ