If this video helped you, please consider clicking on the THANKS button above to support my channel 🙌 and don’t miss this video on how to tune a carburetor: th-cam.com/video/UyngDl_2km0/w-d-xo.html
Thank you for sharing this with us. I have always hoped that someone who knows about these carburetor's would do an indepth repair video like this one and the other ones also? So thank you again for helping us with these videos of how to do these repairs
I feel videos like these are 10% information, and 90% how it’s delivered to the audience. And you absolutely blew this one out of the park! I’ve never seen this way of testing and yet I was able to follow you and see/understand exactly what you were doing! I can’t wait to try this method out myself, well done Tom 👍🏻
This gentleman is astounding! I have just watched a few of his videos and learned more about carburetors than I have in years. The information is not readily available on the Internet until I found this gentleman. Thank you. Keep up the great work.
@@VintageEngineRepairs Tom, your information is well presented and clear. I can tell you put hours into each video to get it just right. We all appreciate you. Keep up the good work!
Great video, very informative. Most people do not have the luxury to throw away a piece of equipment. Thank you from Puerto Rico for helping many people to repair our stuff. I have one question. In the video you place a small amount of fuel on the carburetor from a brass nozzle that I assume is from a squirt bottle. Are they available on Amazon or where can I get one. Keep up the great work mate.
Your channel is unparalleled, and will be a reference for decades. I'd love to see more of these, with more details of how these actually work. For such a tiny cube, they are amazingly complex.
What I wouldn't give to have a chance to spend a couple of weeks with you training on these units. I'm a 57 yo old disabled vet trying to learn the trade but it's very frustrating when I can't diagnose something immediately. I realize I way overthink things but that's just me. Thank you for a fantastic video sir
Wow man you live in a different place in the world. Ive messed with dozens of small carbs. My parts guys would call me stuipid trying to find that kit. When a small engine has weak compression, a new carb( carbs also physically wear) is less expensive than a new machine for awhile. Ive never seen internal carb leaks, before the engine looses compression. Very good show-thank you
I've rebuilt many of this type of carburetor but have never seen this information before! This is the best information and presentation on a small engine video that I have seen in a very long time. Brilliant! Every small engine mechanic or hobbyist should watch this!
Very nice! Australians are great at TH-cam! There is Garn, Superwog, Ozzie Man Reviews, Vintage Engine Repairs, and so many more. Im 14 and will 100% be using some of these tips once I get all of stuff for my MS 200t build that I will also make some vids about. Cheers!
Yeah I only ever have to use a Phillips screwdriver usually a P2 sometimes a P1 every now and again using a flat head, usually a pair of needle-nose pliers to get maybe the gas line off if it's not coming off easily, and usually a pair of fine tip tweezers and then a small stainless steel bowl to set everything in a stainless steel bowl. normally just take the whole thing apart and then use a can of carburetor cleaner with the red tube the red tube is the most necessary thing with a can of carb cleaner. And then I will just spray everything nice and clean spray through every last thing that looks like a hole and being sure to notice if it's actually spring through the hole or if it's just possibly a screw hole and it's just back spraying on me and then just after spraying it all down making sure that it's spotless putting it back together the same way that it got taken apart and spraying down as I go making sure not one bit of dirt gets into the thing and and so far I've probably done a good two or three hundred Carburetors in my life and I've never had to go through the extremes that you're showing in this video
Yom brillant content for those of us that want to repair their tool.when things go wrong, especially in this throw away world! Out of curiosity the drill bit in the tool kit what size is it! Btw sourced my no spill fuel.can awesome 👍
Can you recommend anywhere other than dealers (so probably online) to order parts from? Im looking for a bulk load (say 20) of float needles for gx160 type engines with mostly Keihin BE65QA carbs or similar. Some Chonda, some original. Excellent videos mate. Really appreciate them. Been working on all types of engines all my life and still learning, thankfully!! There's always room for more knowledge! Cheers dude!!
I’ve had luck soaking the carb in Pine sol overnite and then blowing out the orifices with carb cleaner. A Tillotson HS136E was successfully cleaned and put into service again 😊. One question however , do know of a tool kit for re-cutting the seat in the carb housing (seal between needle and housing) … I used a qtip with polish several times however the seat was so hammered it would not clean up. I was able to use an appropriate size drill bit ground to the angle of the needle and holding the bit in a tap wench slowly “cut” a hair of the seat - THEN polish again and it’s now working. These Tillotson HS 136 b,c,d,e,j series are used on many older saws and are very difficult to source new - just wondering if there is a commercial tool available for this application other than my ghetto tech method 😂 thanks !
@@VintageEngineRepairs I’m having a drill cnc ground to the exact taper of the needle … then we can take a very light cut by hand and use some polish to lap the surface true. Of course the metering arm may not be flush with the housing but as long as it seals….. Another option I found is to retro-fit a 395carb , you’ll have to drill for a fitting for the impulse line either in the cylinder or the intake block. I thought I had found the rainbows end and ordered a HS136C but later recieved and email stating NLA. I make it work somehow thanks for the reply ! 😎
The fuel tank is below the carb or yes gravity could leak through those two pump flaps as gravity draws fuel down . i understand all about the ventura and the diff pressures along the throat (as a pilot training engines, carbs, suctions for instruments and "static port" ) SO why does the 4 stroke make this carb work without pulse but the 2 stroke needs the pulse hole to work those flaps or leak past them if a suction is produced ? Seems both intakes make a vacuum. I have worked on many of diff carbs cleaning rekitting and even trying diff metering springs to get the right "pop off" pressures and right amount of fuel in that little bowl for high power but not too much for idle or it will flood. So assume i understand about the diff sections of the carbs and bleeds and idle lines and main jets and check valves ect.
Because I don’t know what machine it’s off and what that carburetor is I can’t really help, but send some pictures of the machine and carburetor to my email and I’ll explain it to you tomscandian@hotmail.com
@@VintageEngineRepairs Its a yard king 4 stroke 24.5cc with fuel tank under and i just found out as i suspected that the 2 stroke draw with or without the reed is LESS than the heavy 4 stroke suction and thus this will produce enough suction through that main jet tube and down into the body where the pump gasket is and draw fuel through them and all good. I can see when i pull the rope the fuel going up the fuel line but with no pulse hole on the carb or engine manifold. Theres no other holes in the throat of a Var jet Venuri so thats only way it can make suction down into the carb and enough to draw fuel in but the 2 stroke "intake" suction can manage this and needs that pulse port to work those 2 flaps.
Will u tell me stihl 261's carb. It has a hole in the metering pump side cover. What is it for?it's end is blocked. Its start is connect to metering pumpbhole. @@VintageEngineRepairs
Hey Tom got a question for you. Is it possible for a check valve to pass the tests and still fail intermittently when running the unit? If I adjust the carburetor everything runs fine and 20 minutes later when I restart, it sputters and needs to be readjusted. Already pressure and vacuum tested the engine.
I have a question about the Tachometer you link to. My instructions say to hold the set button to toggle to the correct engine mode, but it's not clear what those are. Do you know the Set number for 2 stroke 1 cylinder and 4 stroke 1 cylinder? Thanks, Mike
Hey Tom, I tried testing a stihl fs 280 carburetor with the same steps provided in the video and it leaks in both high and low drillings. I even tried a new one with the same results. These carburetors are probably built different. Much appreciated if you can help me understand its design.
Yes there are a few differences. If you don’t have a purge bulb on the carb, the low speed drillings will always leak unless you close the screw all the way. The high shouldn’t though, as there is a check valve on them. In some rare instances they use a capillary screen, but not on modern machines! Are you using after market carbs - they’re an always an unknown entity!
@VintageEngineRepairs I'm only using original carbs. Tested 3 carbs for the same model so far, and every high drilling is leaking (if i tighten them all the way, there are no leaks). There's something we're missing.
@VintageEngineRepairs Yes sir, wet as instructed. Cleaned the carb, reinstalled it in the unit, and it ran perfectly. If you ever come across any working carburetors like that, please let me know.. maybe I'm just crazy.
@l3git_098 I certainly will!! Send me an email and I’ll forward you the stihl documentation to this procedure for your reference: tomscandian@hotmail.com
First, I grew up in a family of slow- talking mid-westerners, and second, I'm now old and slow on the up-take, with the result that much of that info blew by too fast. The carb in my old Echo line-trimmer has a bad bog, probably from the accelerator pump o-ring (per your other video). As I go through the carb, I'll have my laptop on the bench beside me so I can repeat, repeat, repeat. Not a big deal, and I'm certainly not griping after all of your help! But may I humbly suggest that you take just a little more time on your pictures of each operation, with a background voiceover . . . ?? Regardless, thanks much!!
Hi, Why can you use a 2 stoke carb like a walbro or var jet type WXY? on a 4 stroke with the pump diaphragm installed BUT no impulse input?? It WORKS of course but seems both engines produce suction through their fuel/air ports BUT the 2 stroke wont work if you blank off the pulse port. I can only guess that the 4 stoke produces strong input suction? and this draws up on the main jet producing a vac inside the carb and the little pump valves then draw fuel through? So whats special about inlet valve suction on a 4 stoke compared to the 2 stroke suction? why doesant that do same effect or is it timing or volume and thus needs a extra pulse port? I only seen this on a Var jet so will it only work with this type as it has a long plastic tube and cut to let the fuel out and this provides a strong suction down into the carb but needs the impulse port hole built in for 2 strokes? The Var jet that came with the 4 stoke does NOT have a port hole and of course neither does the inlet port for the 4 stroke inlet either. For a test, I also grabbed another Var jet 2 stroke with a carb pulse hole and put it on the 4 stroke manifold which blanks off that pulse hole and it still worked! so that 4 stroke inlet suction is diff from 2 stroke inlet suction somehow?
Hey, if the 4 stroke carb doesn’t have an impulse and fuel pump then it’s gravity fed, the tank will be above the carburetor :) some 4 strokes have a fuel pump but that requires a small spring in the fuel pump side of the carby to oppose the vacuum pulse (no pressure pulse in a 4t crankcase due to pcv valve. I think you’re getting confused about pumping the fuel and the venturi effect too. The fuel pump doesn’t squirt fuel into the throat of the carb - it’s a pressure differential that is created and fuel is drawn out. If you place a straw in water and you spray your air compressor nozzle right over it at 90 degrees you’ll see exactly how l a carburetor works.
Ugh i thought carborators were just change the diaphragms and clean out. Now wonder why i can ever seem to get any old saw running right. And now wonder they put those little discs in the kit. Haha. Ugh. Im gonna have to watch this video many times.
Hi,I have walbro HDA 154A and i need check valve. But i couldn't find it on google,would you help me with that? I found severals but its nkt the same as mine.Where I can contact you and send you pictures? This carb is from Husqvarna chainsaw 345. 😀
Hi i am in uk i have a stihl fs 56 r strimmer carburetor leaking fuel in to air filter will not run carburetor zama s145a839a may be a cheap carb need strimmer not worth much regards
Hey, sounds like your needle is leaking letting the fuel flow out of the drillings :) pressurise the fuel line (you take the filter off) and pressurise it to 7psi. It should hold, yours likely won’t.
Why doesnt anyone state not to poke anything into these holes and that the stubborn dirt in them may actually be a valve... yep wingin it as usual. Sometimes doing things wrong can accelerate your learning .....
You VASTLY underestimate the value of my time, sir. First time my saw doesn't operate at 100%, the very moment that I need it to, STRAIGHT IN THE BIN!! Absolutely no tolerance for fiddling about with rubbish that fails and let's me down.
Hahahahahahahahahaha. Wow. You seem to think that you're a lot more important than you ever will be. I have no idea who you are or what you do to think that, but your comment says a lot about you. The world needs less people like you and more people like the fella in the video.
If this video helped you, please consider clicking on the THANKS button above to support my channel 🙌 and don’t miss this video on how to tune a carburetor: th-cam.com/video/UyngDl_2km0/w-d-xo.html
Great info Tom. You are the only person on the entire planet who can do a good technical video that is easy to follow... on a stump. 🤣😁👍
Hahaha thanks mate 🤣👍👍
Tom has a stump so that we are not stumped working on the two stroke carburetor.
@@haneyoakie14 I just love the stump. Tom is the only person I know working off the bench that knows what he is talking about. 👍
@@haneyoakie14 You are bringing your 'A' game today! 😁
🤣👍
10,000 TIMES thank you. From West Africa in the bush.
Awesome mate! You’re welcome :)
First TH-cam video I have ever seen that goes into detail of how to replace and repair those check valves! Great information!
Thank you! Glad you enjoyed it :)
Thank you for sharing this with us. I have always hoped that someone who knows about these carburetor's would do an indepth repair video like this one and the other ones also? So thank you again for helping us with these videos of how to do these repairs
I’m glad you enjoyed it :)
I feel videos like these are 10% information, and 90% how it’s delivered to the audience. And you absolutely blew this one out of the park! I’ve never seen this way of testing and yet I was able to follow you and see/understand exactly what you were doing! I can’t wait to try this method out myself, well done Tom 👍🏻
Thank you! I really appreciate it!! Glad you enjoyed it :)
This gentleman is astounding! I have just watched a few of his videos and learned more about carburetors than I have in years. The information is not readily available on the Internet until I found this gentleman. Thank you. Keep up the great work.
Thank you for the kind words, I really appreciate it :)
I can’t bring you a cup of coffee, but I will buy you one.
Always top quality content and well worth watching. Repeatedly when necessary.
Ah bless you mate!!! That’s such a cool gesture! Thank you :)
@@VintageEngineRepairs Tom, your information is well presented and clear. I can tell you put hours into each video to get it just right. We all appreciate you. Keep up the good work!
Thank you :) I appreciate it a lot!!
Great video, very informative. Most people do not have the luxury to throw away a piece of equipment. Thank you from Puerto Rico for helping many people to repair our stuff. I have one question. In the video you place a small amount of fuel on the carburetor from a brass nozzle that I assume is from a squirt bottle. Are they available on Amazon or where can I get one. Keep up the great work mate.
Your channel is unparalleled, and will be a reference for decades. I'd love to see more of these, with more details of how these actually work. For such a tiny cube, they are amazingly complex.
Thank you :) that’s great to hear!
What I wouldn't give to have a chance to spend a couple of weeks with you training on these units. I'm a 57 yo old disabled vet trying to learn the trade but it's very frustrating when I can't diagnose something immediately. I realize I way overthink things but that's just me. Thank you for a fantastic video sir
Thank you for the kind words! You can always reach out to ask me questions :) happy to help where I can!!
Wow man you live in a different place in the world. Ive messed with dozens of small carbs. My parts guys would call me stuipid trying to find that kit. When a small engine has weak compression, a new carb( carbs also physically wear) is less expensive than a new machine for awhile. Ive never seen internal carb leaks, before the engine looses compression. Very good show-thank you
Thanks for watching!
Some brilliant advice here. Your videos have proven to be very informative. Thank you.
Thank you!!
Thanks for the video Tom, very informative.
Thanks John!
Amazing! Thanks for supporting repair and reuse Tom.
Thank you Clint!!
Great presentation and great info. A good usebfor the internet has been found
Thank you :)
Great video and channel. I only found this channel a few days ago, oh how i wish i found it a lot sooner 👍🏻👌🏻
Thank you! Glad you enjoyed it!
Amazing video. We need more pioneers like this
Thank you mate I really appreciate it!
You've put together a great video Tom. Doing it on a stump is a nice touch!
Thank you mate :) much appreciated!
Another awesome to the point video! Thank you!
You’re welcome, thank you!
I've rebuilt many of this type of carburetor but have never seen this information before! This is the best information and presentation on a small engine video that I have seen in a very long time. Brilliant! Every small engine mechanic or hobbyist should watch this!
Thank you! I really appreciate it :)
Very very good video Tom .
People with two left hands will not be able to fix a carburateur.
Thank you Steven! They can be tricky little things, not everyone will have the patients or willingness to fix them, but each to their own :)
Great info Tom
Thank you Al!
Very nice! Australians are great at TH-cam! There is Garn, Superwog, Ozzie Man Reviews, Vintage Engine Repairs, and so many more. Im 14 and will 100% be using some of these tips once I get all of stuff for my MS 200t build that I will also make some vids about. Cheers!
Thanks! I’m actually English, I just live out here :) lots of great channels from Aussi’s though!
u are realy good, u go in to the right details, it is clear that u "get it" .......tanks 🙂
Thanks for the kind words :)
Yeah I only ever have to use a Phillips screwdriver usually a P2 sometimes a P1 every now and again using a flat head, usually a pair of needle-nose pliers to get maybe the gas line off if it's not coming off easily, and usually a pair of fine tip tweezers and then a small stainless steel bowl to set everything in a stainless steel bowl. normally just take the whole thing apart and then use a can of carburetor cleaner with the red tube the red tube is the most necessary thing with a can of carb cleaner. And then I will just spray everything nice and clean spray through every last thing that looks like a hole and being sure to notice if it's actually spring through the hole or if it's just possibly a screw hole and it's just back spraying on me and then just after spraying it all down making sure that it's spotless putting it back together the same way that it got taken apart and spraying down as I go making sure not one bit of dirt gets into the thing and and so far I've probably done a good two or three hundred Carburetors in my life and I've never had to go through the extremes that you're showing in this video
They’re service parts, they need to be changed when they fail. Thanks for watching.
Thank you for this info, many out there even seasoned mechanics would have not known these small details.🐞
You’re quite right :) we’re in a throw away society now days!
Also I always find it harder to remember what the repair shops have told me, when I've asked for help?
Yes it can be overwhelming can’t it!
Yom brillant content for those of us that want to repair their tool.when things go wrong, especially in this throw away world! Out of curiosity the drill bit in the tool kit what size is it! Btw sourced my no spill fuel.can awesome 👍
Hey! Glad you enjoyed it!! I’ll have to double check, I’m not even sure they say on them the size!!
Can you recommend anywhere other than dealers (so probably online) to order parts from?
Im looking for a bulk load (say 20) of float needles for gx160 type engines with mostly Keihin BE65QA carbs or similar.
Some Chonda, some original.
Excellent videos mate.
Really appreciate them.
Been working on all types of engines all my life and still learning, thankfully!!
There's always room for more knowledge!
Cheers dude!!
Hey mate :) yes, dealers are your best bet. I have had great success with aftermarket carb kits, but I’d not buy complete aftermarket carbs.
I always repaired my carburetor's with basic tools, an air compressor is a must.
Be careful which hole you spray the air into!
@@VintageEngineRepairs I'm always careful. Never had any problems.
Great video, thanks for the info!
Thank you!
I’ve had luck soaking the carb in Pine sol overnite and then blowing out the orifices with carb cleaner. A Tillotson HS136E was successfully cleaned and put into service again 😊. One question however , do know of a tool kit for re-cutting the seat in the carb housing (seal between needle and housing) … I used a qtip with polish several times however the seat was so hammered it would not clean up. I was able to use an appropriate size drill bit ground to the angle of the needle and holding the bit in a tap wench slowly “cut” a hair of the seat - THEN polish again and it’s now working. These Tillotson HS 136 b,c,d,e,j series are used on many older saws and are very difficult to source new - just wondering if there is a commercial tool available for this application other than my ghetto tech method 😂 thanks !
Hey, I have successfully cut seats using a small end mill, I can’t remember what size it is, but find one that fits :)
@@VintageEngineRepairs I’m having a drill cnc ground to the exact taper of the needle … then we can take a very light cut by hand and use some polish to lap the surface true. Of course the metering arm may not be flush with the housing but as long as it seals….. Another option I found is to retro-fit a 395carb , you’ll have to drill for a fitting for the impulse line either in the cylinder or the intake block. I thought I had found the rainbows end and ordered a HS136C but later recieved and email stating NLA. I make it work somehow thanks for the reply ! 😎
Well done as usual Tom.
Thank you Barry!
Awesome!!! Thank you!!
You’re welcome!
The fuel tank is below the carb or yes gravity could leak through those two pump flaps as gravity draws fuel down . i understand all about the ventura and the diff pressures along the throat (as a pilot training engines, carbs, suctions for instruments and "static port" ) SO why does the 4 stroke make this carb work without pulse but the 2 stroke needs the pulse hole to work those flaps or leak past them if a suction is produced ? Seems both intakes make a vacuum. I have worked on many of diff carbs cleaning rekitting and even trying diff metering springs to get the right "pop off" pressures and right amount of fuel in that little bowl for high power but not too much for idle or it will flood. So assume i understand about the diff sections of the carbs and bleeds and idle lines and main jets and check valves ect.
Because I don’t know what machine it’s off and what that carburetor is I can’t really help, but send some pictures of the machine and carburetor to my email and I’ll explain it to you tomscandian@hotmail.com
@@VintageEngineRepairs Its a yard king 4 stroke 24.5cc with fuel tank under and i just found out as i suspected that the 2 stroke draw with or without the reed is LESS than the heavy 4 stroke suction and thus this will produce enough suction through that main jet tube and down into the body where the pump gasket is and draw fuel through them and all good. I can see when i pull the rope the fuel going up the fuel line but with no pulse hole on the carb or engine manifold. Theres no other holes in the throat of a Var jet Venuri so thats only way it can make suction down into the carb and enough to draw fuel in but the 2 stroke "intake" suction can manage this and needs that pulse port to work those 2 flaps.
Fantastic video brother Tom thanks for sharing buddy 👍
Thanks mate, glad you enjoyed it!!
thanx so much. I'm fall in love with u r info.
Thanks mate, glad you enjoy my content!
Will u tell me stihl 261's carb.
It has a hole in the metering pump side cover. What is it for?it's end is blocked. Its start is connect to metering pumpbhole. @@VintageEngineRepairs
Hey Tom got a question for you. Is it possible for a check valve to pass the tests and still fail intermittently when running the unit?
If I adjust the carburetor everything runs fine and 20 minutes later when I restart, it sputters and needs to be readjusted.
Already pressure and vacuum tested the engine.
Check valves can seal intermittently, yes :)
@VintageEngineRepairs Thank you my good sir!
I have a question about the Tachometer you link to. My instructions say to hold the set button to toggle to the correct engine mode, but it's not clear what those are. Do you know the Set number for 2 stroke 1 cylinder and 4 stroke 1 cylinder?
Thanks,
Mike
Hey Mike! Yes :) you need the 2:1 4:2 setting
@@VintageEngineRepairs Great. Thanks.
Another great video Tom. 👍🏻
Thanks mate 👍👍
Hey Tom, I tried testing a stihl fs 280 carburetor with the same steps provided in the video and it leaks in both high and low drillings. I even tried a new one with the same results.
These carburetors are probably built different.
Much appreciated if you can help me understand its design.
Yes there are a few differences. If you don’t have a purge bulb on the carb, the low speed drillings will always leak unless you close the screw all the way. The high shouldn’t though, as there is a check valve on them. In some rare instances they use a capillary screen, but not on modern machines! Are you using after market carbs - they’re an always an unknown entity!
@VintageEngineRepairs I'm only using original carbs. Tested 3 carbs for the same model so far, and every high drilling is leaking (if i tighten them all the way, there are no leaks).
There's something we're missing.
Yeah that’s not right haha, you’re wetting the drillings with fuel?
@VintageEngineRepairs Yes sir, wet as instructed. Cleaned the carb, reinstalled it in the unit, and it ran perfectly.
If you ever come across any working carburetors like that, please let me know.. maybe I'm just crazy.
@l3git_098 I certainly will!! Send me an email and I’ll forward you the stihl documentation to this procedure for your reference: tomscandian@hotmail.com
Never I mean Never have I seen such in-depth information on these small carburetors..I have a clamp light that but not the foam to seal..humm🤔
Glad you enjoyed it, thank you!
First, I grew up in a family of slow- talking mid-westerners, and second, I'm now old and slow on the up-take, with the result that much of that info blew by too fast. The carb in my old Echo line-trimmer has a bad bog, probably from the accelerator pump o-ring (per your other video). As I go through the carb, I'll have my laptop on the bench beside me so I can repeat, repeat, repeat. Not a big deal, and I'm certainly not griping after all of your help! But may I humbly suggest that you take just a little more time on your pictures of each operation, with a background voiceover . . . ?? Regardless, thanks much!!
Thank you for the feedback :)
Good info Tom.
Thanks Pete!
That's a handy little stump vice. Got a link to that as well?
Hey, sure! amzn.to/3waHuOw
amazing video as always
Thank you :)
What’s the little brass fuel bottle you are using?
It’s a pressol oil bottle, they’ve become stupidly expensive now, not worth it. The zoom oil bottles are what I’d suggest getting… amzn.to/3TWZV2t
Ah yah. They have. Thanks for reply.
Hi, Why can you use a 2 stoke carb like a walbro or var jet type WXY? on a 4 stroke with the pump diaphragm installed BUT no impulse input?? It WORKS of course but seems both engines produce suction through their fuel/air ports BUT the 2 stroke wont work if you blank off the pulse port. I can only guess that the 4 stoke produces strong input suction? and this draws up on the main jet producing a vac inside the carb and the little pump valves then draw fuel through? So whats special about inlet valve suction on a 4 stoke compared to the 2 stroke suction? why doesant that do same effect or is it timing or volume and thus needs a extra pulse port? I only seen this on a Var jet so will it only work with this type as it has a long plastic tube and cut to let the fuel out and this provides a strong suction down into the carb but needs the impulse port hole built in for 2 strokes? The Var jet that came with the 4 stoke does NOT have a port hole and of course neither does the inlet port for the 4 stroke inlet either. For a test, I also grabbed another Var jet 2 stroke with a carb pulse hole and put it on the 4 stroke manifold which blanks off that pulse hole and it still worked! so that 4 stroke inlet suction is diff from 2 stroke inlet suction somehow?
Hey, if the 4 stroke carb doesn’t have an impulse and fuel pump then it’s gravity fed, the tank will be above the carburetor :) some 4 strokes have a fuel pump but that requires a small spring in the fuel pump side of the carby to oppose the vacuum pulse (no pressure pulse in a 4t crankcase due to pcv
valve. I think you’re getting confused about pumping the fuel and the venturi effect too. The fuel pump doesn’t squirt fuel into the throat of the carb - it’s a pressure differential that is created and fuel is drawn out. If you place a straw in water and you spray your air compressor nozzle right over it at 90 degrees you’ll see exactly how l a carburetor works.
Ugh i thought carborators were just change the diaphragms and clean out. Now wonder why i can ever seem to get any old saw running right. And now wonder they put those little discs in the kit. Haha. Ugh. Im gonna have to watch this video many times.
Haha there is a lot to them isn’t there 🤣
Hi,I have walbro HDA 154A and i need check valve. But i couldn't find it on google,would you help me with that? I found severals but its nkt the same as mine.Where I can contact you and send you pictures? This carb is from Husqvarna chainsaw 345. 😀
Hey mate, if it’s the main nozzle you’re after here you go - Nozzle Assembly Check Valve 86-578-1
Hi i am in uk i have a stihl fs 56 r strimmer carburetor leaking fuel in to air filter will not run carburetor zama s145a839a may be a cheap carb need strimmer not worth much regards
Hey, sounds like your needle is leaking letting the fuel flow out of the drillings :) pressurise the fuel line (you take the filter off) and pressurise it to 7psi. It should hold, yours likely won’t.
cuándo mibonba dé purga se llena qué problema está ocasionando eso en el carburador por qué mi bomba de cebado se llena cada vez que bombeo
Hey! That’s good that it fills up haha :)
Se llena bien llena no es ningún problema no tiene que estar nada más a la mitad eso es normal maestro@@VintageEngineRepairs
Why doesnt anyone state not to poke anything into these holes and that the stubborn dirt in them may actually be a valve... yep wingin it as usual. Sometimes doing things wrong can accelerate your learning .....
Yep it can be! Soft nylon won’t damage anything, but steel will
💯☝🤝👍
Thank you!
Think I'd rather just buy a new carb 😅😅
Nooo lol don’t be a parts swapper :)
Defeatist
dizzying
Thanks for watching
No
Tiny toilet!
Sorry mate I don’t get it
You VASTLY underestimate the value of my time, sir. First time my saw doesn't operate at 100%, the very moment that I need it to, STRAIGHT IN THE BIN!! Absolutely no tolerance for fiddling about with rubbish that fails and let's me down.
Thanks for watching
Hahahahahahahahahaha.
Wow.
You seem to think that you're a lot more important than you ever will be.
I have no idea who you are or what you do to think that, but your comment says a lot about you.
The world needs less people like you and more people like the fella in the video.