2 Stroke Carburetor - In depth Fault Finding, Testing, Service & Repair
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- Опубліковано 29 чер 2024
- A full in depth tutorial on how to service, repair and fault find a 2 stroke carburetor for all your small engines. These carburetors are found on Honda, Stihl, husqvarna and all other main brand engines you'll have in your garage or workshop
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Any links to products are likely to affiliate links and I may earn a small commission from qualifying purchases with no additional costs to you. Thank you!
00:00 diagnosing a small engine carburetor
00:28 pressure testing a carburetor
02:33 small engine carburetor disassembly
10:03 Testing & replacing the main nozzel check valve
25:05 setting the metering lever height
25:30 2 stroke carburetor adjustment screw installation
#Hondacarburetor #stihlcarburetor #husvarna #honda
If this video helped you, please consider clicking on the THANKS button above to support my channel 🙌
Quick question, I have a 445 husqvarna x-torq that won't start but he sparkplug and exaust end floodsm??
@@jorgehetnandez1696 You may find the needle is leaking in the carburetor? Clean up inside and double check :) either that or you’re not following the correct starting procedure? Could be a stiff metering diaphragm too, they can put more pressure on the lever. Have a look inside the carburetor is my advise :)
This is what I was looking for. You mention that the butterfly valve shaft cannot hang. For my Zama carburetor, it hangs both ways. Is that why I can't adjust the carburetor? Thanks again for the vids!!!
Awesome video! I’ve learned so much more from this video!
Do you have a link to the carb repair kit?
I've just watched up to the 13 minute mark and already learned more about these small carbs than I ever did in 40 years of messing with them. Great information well presented.
Thanks mate :) much appreciated!
10,000 TIMES thank you! !
Absolutely one of the most informative two-stroke carburetor rebuilds I have seen on UA-cam yet and I have seen hundreds of videos on this topic, and have rebuilt hundreds of these carburetors myself only to learn something new in less than 20 minutes after 30 years of doing it! Best damn video around!
Thank you Bob, your kind words are much appreciated!!!
There is a wealth of knowledge out there.
The majority of people do not take the time to listen and learn from others.
Instead many chose ignorance and are proud of it.
Some f what I learned is from experience and making errors
everything else I learned from those who know more than I do.
I don't like sports that much - never did - I much like knowledge and learning
Same here to both of you!
I've learned more from this 30 minute video than I have from 10 other 40 minute videos. Excellent video! Thanks!
Glad you enjoyed it :)
This is the best video I've seen to check 2 stroke carburetors. It has helped me greatly in diagnosing problems. Thanks for posting this!
Eddie's Garage
You’re welcome! :)
Hey, I've watched dozens of videos on carb troubleshooting, and cleaning, and rebuilding. I've taken apart and worked on dozens of carbs myself, and this video was THE most in depth, and informative video on a 2-stroke carb, that I have ever seen. Cheers to you. Thanks so much for putting this together, and posting it.
Awesome thank you! I’m glad you enjoyed it!
don't ever change how you give or do your videos , i been doing this work for over 30 years my own shop for 20 and every time I learn something new, or the proper or better way to explain it to my customers or employees so they understand the problem or understand how to fix the problem. so once again ,Thank You .
Thank you! I really appreciate it :)
Most informative small carb information I've seen! Thank you and keep it up.
Thanks, glad you enjoyed it!
Thanks for clearly showing those tests. Never knew about the vacuum test on the main nozzle. Showing the punch out and re-seating of it was great. I'm often hesitant to take things apart too much (i.e. welch plugs) b/c I think I won't get them as well sealed as from the factory.
I'm always that there is a spring or something behind the Welch plug that I will lose when removing the Welch plug! 😢
Same here. That vacuum test makes great sense. I never thought to try it. Wish I had time and time again though. Thks
Here I am, 8 hours into an old craftsman chainsaw rebuild. Too stubborn to quit. The carb is the last piece of the puzzle. Thanks for the video!
You’re welcome!
Simply a brilliant tutorial, and I thank you much. Only complaint I can't get to sleep with all the valuable information you provide. All the best to you across the pond.
Thank you Stewart!! Save them for the weekend haha :)
Hands down the best, most informative video on these carburetors in existence. Thank you!
That’s very high praise, thank you!
@@VintageEngineRepairs I have no formal training, just what I’ve figured out on my own and what I’ve learned from watching videos. I’ve worked on these machines quite a bit over the past 30 years with mostly good results. After watching your video, it made me want to learn more about these little carburetors and it reignited my interest in working on these little machines. Where do you find kits that have the welch plug and brass check valve in them? Every kit I’ve ever seen only has gaskets, diaphragms, and the needle parts. Thanks again!
Brilliant video explaining what took me 40 years to learn by hard lessons. Only bit you missed was the throttle control lever and post attached to the throttle valve. I've seen many carby's worn out and leaking fuel or sucking air due to continuous grit grinding them down.
Absolutely spot on! They can wear / wallow out and cause an air leak. Thanks for the reminder :)
I was given a brush cutter motor and am building a remote control aircraft using it as the engine.
It was not going and was destined for the scrap bin by the last owner. Thanks to the effort and time you spent making this video it is now running like a new one !
Thank you :)
That’s awesome, I’m glad it helped :)
This is the best video I have seen for troubleshooting and repairing this small engine carburetor.
Thank you!!
Great, really great presentation. Thorough visuals and an unmatched understanding and explanation of this once Mystery Device.
Thank you for the kind words :) much appreciated!!
This is the best technical but understandable explanation of these little carbs. Thank you as I learned things to and how to test!
Fantastic! You’re welcome!
repaired engines all my life, bikes, mowers, hedge cutters, strimmers, etc
there is only one word that describes your tutorial,
BRILLIANT.
Thank you for such kind words!! It’s much appreciated :) glad you enjoyed it!
Definitely had to bookmark this video. Best video out there, hands down on two stroke carb testing. Thank You Sir.
You’re welcome!
Thank you, well described. Had difficulties with an ice auger that would not start, followed you tutorial and back up and running. Thank you
Glad it helped :)
Probably the most informative video I've ever watched.Straight forward and to the point,I appreciate the info and thank you .
Thank you! I’m pleased you enjoyed it :)
"the best small engine carburetor video I have seen so far ever on UA-cam" ⭐⭐⭐⭐⭐ thanks 👍
Thank you Mark!
Great showing step by step ,how to clean a 2 stroke carburetor
Thanks :)
Best vid I've seen for these carbs BUT i replace them for $20 and they work appreciate your time.
Thanks for watching :)
I've watched about a dozen small engine/Walbro carb videos in the last week and this one is the best I've seen. Excellent content and no wasted words. Very useful stuff!
Thank you! I’m pleased to hear it :)
Better than the Walbro tech guy videos.
Better than the Walbro tech guy videos.
Thankyou so much for making this video I have watched many over the years but now have the complete version! So many little gremlins playing with carbs while we sleep but I'm confident I'll find them now cheers Dave
You’re most welcome Dave! Thanks for commenting and sharing your kind words!
The standard by which all others shall be judged has been set. Thank You for your generosity.
Amazing video, you demonstrated some very intriguing troubleshooting techniques. Thanks
Thank you :)
BOY,YOU TURN OUT AMAZING AS YOU EXPLAINED IN DETAIL AND NAIL POLISH I DIDNT,T THINK COULD BE USED FOR SEALING .I WISH YOUTHE BEST OF LUCK BECAUZE YOU REALLY DESERVE IT
Thank you very much :)
FANTASTIC VIDEO!!! Hands down UA-cam's best video on this subject! 💯x💯
Thank you :) glad you enjoyed it!
Hey thank you! Now with your lesson help there may well be hope and a cure for my 2stroke carb troubles. Over the years I've had so many issues with carbs on 2stroke engines that I have grown quite an aversion to them...
Excellent :) best of luck!!
I can't stand the bloody things. Replacing them all with 4 strokes.
Best video I ever seen on these carbs. Well done👍
Thank you! :)
Thank you! Looking forward checking out your other videos.
Thank you :)
great camera work. Most people who do this type of display screw up the focus. Very informative!
Thank you!
hands down the best carb video and i seen many. great work,thanks
Thank you!!
Thank you so much! Quick, concise and well explained and detailed such a fantastic creator. Thank you
Thank you!!
Cool video, I learned stuff that will help me on my tiny engines. Thank you
Fantastic :)
⚠⚠Thank You for an outstanding and infotmative video. Absolutely the best how to video that I've ever watched. Simple, to the point and done in a manner that is easy to follow. I will remember this information forever.
Glad you enjoyed it! Thanks for watching :)
Awesome. Detailed and nicely explained. Thanks
Thank you!,
Superb! I'll have another go on mine armed with this help. Many thanks!
You’re welcome!
This is very helpful I enjoyed watching you and explain everything like you do
Thank you :)
I agree with all the positive comments - great video - very clear camera work so you can see everything and very helpful commentary - now off to finally get my Stihl SH85 leaf blower working after 4 failed attempts!!
Wooo! Good luck :) keep me updated!
@@VintageEngineRepairs - well I have succeeded - it has a v cheap brand new OEM C1Q-S68G carb that I got from eBay for £13. I have stripped it down a couple of times before I watched your video, but not all the way. So took everything off and re-cleaned with carb cleaner and compressed air.
The only think I spotted that might have been a problem was that the inlet control lever was hardly moving the inlet needle at all - much less than on another old carb I compared it to. So I bent the needle end of the lever (with the fork) up by about 0.5mm so that it was clearly moving up. Put it all back together and....nothing. Guess why? I forgot to reset the H & L needles. Once I did that it started easily and is running v well - just got to adjust the tickover as that's not quite right at the moment.
So my top tip is - don't forget to reset the H & L needles after a carb teardown!!
The only other problem I had was working out which way to put the metering diaphram back in - in addition to the screw holes it has 2 other holes at one end and I really couldn't see if it mattered which way to put ot back - so I guessed!
Thanks again.
Thorough, detailed, well done.
Thank you :)
Excellent video. Very comprehensive.
Thank you!
Great video nice clear picture and sound..
Thanks! Glad you enjoyed it
Awesome tutorial I have learnt so much in 10 minutes than in my 62 years of life. 😊😊😊
That’s wonderful to hear, thank you! Glad you enjoyed the video :)
Great video! Bookmarking this one...
Im from the states and I enjoy your vids. I have a small engine shop and ive been working on small engines along time! I work on stihl mainly. But i do understand the need to clean and rebuild carbs vs new amazon or oem. Ive had so many come back after putting on an Amazon carb i just stopped ordering them and just buy oem. I go thru the process of cleaning each like you. 4 stroke carburetors are somewhat easy, but the stihl 2 stroke carbs are some of the worst ive worked on. Check valves and the high speed actuators on most are my problem. Fs90 carbs can be brought back to life and Some you just cant save. Carb spray in any carb but stihl seems to work fine. I remember the first stihl carb i cleaned with carb spray and after all that work it was worse than it originally was. I use a lot of little squeeze bottles too! Make my own solvents and lubes. Work better than most store bought. Its nice that there are some people who actually try to get something to work rather than be a part swapper, which i hate and hate 90% of these videos online. Anyone can change a part, but it takes a real mechanic to go into something and diagnose, clean, repair and rebuild what they are working on and it works correctly!
Couldn’t agree more :) well said!
@VintageEngineRepairs hey your videos on when your cleaning and rebuilding carbs is quite calming. 😆 is there anyway you could do one on a rebuild and clean on a fs90 carb? If not I understand! Hey keep up the good work! I love your videos! Cheer!
Salutations! Please allow me to bend your ear a moment? I have come into a couple motorized skateboards recently and the engines are typical Chinese crap without any numbers or identifying marks anywhere. My question is, do u have a decent source for spare parts online? Rebuild kits? Diaphrams etc? I'm at my wits end with these cheap Chinese pos and just want these mfs to run. Any advice or sources for parts would be greatly appreciated. Thanks in advance!
I thought that was an excellent video. Great job ! When I install a new screen that comes in the kit, I use the eraser on the end of a pencil , it is super close to the size of the hole and the eraser material will hold the screen from sliding around so you can precisely push it in the hole squarely. Once again Great job !
Awesome tip thanks for sharing :) glad you enjoyed the video!
Nice presentation with dexterity and skills.
Thank you Janet!
It's really satisfying to completely strip a carb then boil it out on the stovetop in dish soap, suspended on a wire then seeing what is in the bottom of the pan when you're done.
You Rock Tom. Can you believe I am still struggling with 2 strokes. The check valves are one. ? Crank seals are my new nemesis. You have a new handle on your brass hammer like I do.
Thanks Bruce! Glad you enjoyed it :)
@@VintageEngineRepairs Wow I think i edited while you were talking. you are a social media Guru.
Check ball? Didn’t know about that. Sounds like my problem, going to check it. Thanks! Problem was kicking my butt for sure!
Yeah check valve or ball :) carbs come with either one! Best of luck!
Extremely helpful. Thank you.
You’re welcome 👍
Brilliant demo
Thank you!
Congratulations : you really understood howcit works a carburetor!
Thank you, you do too now :) I appreciate you!
Awesome video I'm out in the bush 40kms from the nearest settlement and my saws running like Forest Gump then it just stopped running , lucky I have reception on me phone and got to watch this ,I pulled the carb off and gave it a birthday and now it's clean as a whistle and running like Forrest again I have no nail polish or vacuum pump so I just sucked on the fuel tube no leaks ,salurbrious thank you for the pointers ,the fuel filter in the tank had a crack on where the fuel line pushed on so it was sucking up all sorts of crap that was under the mesh , all good now after sorting them coupla issues out cheers lots of handy tips
That’s awesome :) thanks for taking the time to share your adventures haha
excellent tutorial - so helpful - thanks for all your effort .
Thank you for watching!
Very in-depth and informative!!👍👍👍
Thanks :)
Very good video, I learned a ton of info from this. Thanks for sharing.
Pleasure, thanks for watching!
your channel is a gem
Thank you :) I really appreciate it!
Great video! Thanks for all the details.
God bless you!
You’re welcome, may God bless you too mate 👍
Thank you for the quality of troubleshooting.
You’re welcome!!
That was a great vid! Thank you so much!
You’re very welcome!
glad i found your channel great info 👍🏼
Thank you :)
Very interesting and very informative. I have a bit of knowledge re 4 stroke carbs on motorcycles and older cars 0f the 50's 60's and so on. but have never had to or been fortunate (?) enough to own and have to repair any 2 stroke equipment. Thanks for the video.
You’re welcome, I’m glad you enjoyed it :)
very very informative! good job making this
Thank you :)
Amazing video to educate me, thank you very much.
You’re welcome :)
Very nice detailed explanation..i learned a lot watching ur video..thanks❤
You’re welcome, thanks for watching!
Great video man!
Thanks!
Thanx you are a awsome teacher!!just repair my carbu looking at you!
Awesome, you’re welcome :)
Wow! This is so helpful. Rich, genuine information covering what's been a "black box" for many of us. Thank you! Before: problems were poorly handled using the "shotgun" parts replacement technique. NOW: Test and understand root cause, target the actual problems, repair/replace bare minimum & maintain OEM integrity - resulting in faster, better, more reliable repairs. I've got old carbs that don't work - turns out I have been blowing out main nozzle check valves! Anybody know where to get replacement main nozzles?
Glad you enjoyed it! Yep, your local small engine repair shop can order nozzles.
If I can add one bit of advice: be gentle with the needle valves. Driving them down hard can damage them or the carburetor. Just screw them in gently. I learned this as a kid when running model airplane engines; I ruined a few needle valves until an older guy explained I was being too heavy handed. Great video! Cheers from Canada
Thanks mate :) yep, spot on! Gently seated is fully sealed!
Wow thank you for the video you just gave me some nice tips
You’re welcome :)
Excellent video thank you for sharing 👍🏻
You’re welcome! Thanks for the kind words :)
EXCELLENT 100-100 perfect ty great video
Thank you! Glad you enjoyed it :)
Best and complete demonstration I’ve ever seen thank you
My pleasure thanks for watching!
Better off getting a couple of $10 carbs off Amazon and keeping them on hand, but if you're in a bind and need it working NOW this is great knowledge. Thanks!
Thanks for watching!
Excellent video. Need to save this.
Glad it was helpful!
Great Video, Thanks !!!!
You’re welcome :)
Very informative, this will be so much help to anyone with a 2 stroke .
Concludes my theory that why are they still putting carbs on when a basic injection system would be far more reliable and simple to manufacture??? This goes for lawn mowers, stone saws , chainsaws etc . I’m aware that certain manufacturers have started using injection and from what I’ve seen they still can’t get it right , which suggests to me lack of talent in the design department or the dreaded ‘account says no ‘ . Saving pennies to inevitability ruin a feasible concept!!
Thanks for the content, I will now attempt to rectify running issues with some of our engines
👍😇🇬🇧.
Thanks for the kind words :) glad you enjoyed it! I’ll take a carb over FI on small engines any day :)
Most impressive!
Thank you!
Great Video & excellent camera work, especially the close-ups. I did watch a video from the Walbro company and they mentioned that ethanol fuels can eat away the polish around Welsh plugs and check valves so I am not sure what the answer is here if they are leaking. I look forward to seeing other videos now that I have subscribed and hit the bell for notifications.😁
Thanks for sharing! Yes it can remove it over time. Welch plugs don’t really need sealant on them, the manuals don’t recommend anything now days because of alcohol. The aluminium seals very well :) I use it because we don’t have ethanol, but I’d happily use no sealer!
Excellent presentation. I may actually try to rebuild a few. I've been tossing them to side and buying another; lil carbs are getting pricey these days. Thanks for this information
Pleasure! Glad it helps :)
Excellent instruction👌
Thanks!
Very Informative
Glad you enjoyed it
Great information and so very well shared. I just happen to have a Walbro wt717 from an Echo cs 501sx I have been sourcing a kit for today. Any content you may have done or might do in future on that minefield would be most welcome and helpful I am sure.
Thanks for the kind words! I tend to make content on what comes through the workshop so possibly one day!! :)
Very helpful
Awesome!
Brilliant! Thanks so much for your time and expertise. ❤
You’re welcome!
Great video well done
Thank you!
good teacher🙂
Thank you :)
Finally found useful vids
Haha, it can feel like that sometimes can’t it! Glad you enjoyed it :)
this is the best cube carby rebuild video on UA-cam, so in depth. thanks
Pleasure :) thanks for watching!
A clear and explanatory video with very detailed information. Definitely worth checking out.
If I may give a tip: Speak a little slower and in particular, try to make the video recording seem a little calmer. So move back and forth less and more quietly with the objects shown in the video.
Thanks for watching and the feedback!
Noice, scarlet red nail polish is my favorite too.
Nice haha
excellent video, it is very helpful, thank you very much
You’re welcome :)
Excellent!
Thank you :)
I will simply agree with all the accolades given. I am fighting to understand the carb circuits and operation on a zama but now have a much better knowledge of what to examine.
Wonderful, I’m pleased to hear it! :)
@@VintageEngineRepairs apparently it's got a bad check valve. I can't even get it to deliver any fuel. I'm gonna tell the customer to go buy another.
Okay...so this has got to be the most thorough check list for 2 stroke carbs out there...here...anywhere?
...ehh, anywhere may be a smidgen exaggerated. Definitely the best I have come across...which was actually through Roku...but I had to step over to the PC to comment.
The only thing you may had missed, the primer bulb? Which holes/channels it is suppose to affect.
I didn't realize the idle had 3 jets.
...Oh, look over there... "All Episodes - 2 Stroke Carburetor Learning"
Did I make someone look?
Any ways, I also wanted to capture this for later reference and say this info will surely cause me to spend more time being thorough...but less time over all by not having to disassemble what I had just assembled for the third time.
Glad you enjoyed it! I have other videos on carburetors that have a purge bulb :) hope you enjoy them as much!
I'm slowly going through your video set, and like others this one raises the bar for all that's out there on UA-cam before. Brilliant lighting, excellent focus, and thoughtful dialogue. Can I ask you what camera you are using for close focus?
Thank you! Just my mobile :)
@@VintageEngineRepairs Wow. You're right, my phone is far better than my dying camcorder. I've been experimenting with other options, lately a GoPro, but even at 4K the near focus is poor. It would be so nice to use my old Canon lenses for posting UA-cam videos, but a close look at the R5C shows the cost is too high! We're at a glorious time, to find that simple phones can eclipse what the big boys want to charge thousands for. In the end, content trumps everything, and your channel is outstanding.
@@spelunkerd thanks again for the kind words :) yes the iPhone gives good closes ups!