Succinct and to the point, THANK YOU! So many people drone on and on and on about stupid crap unrelated to the video. THANKS for NOT doing that. GREAT VIDEO!!
I adjusted my fs 90 with no problems after watching this video. Thank you. I noticed I had a missing nut holding on my carb which I replaced and that was probably half my problem with it not running right. I was able to set the high speed adjustment so it spins like it should at full throttle and I was able to adjust the idle so the head doesn’t turn anymore when it is idling. I was just about ready to buy a new weedeater. Thank you
The way you showed how the T screw simply pushes the idle resting stop to hold the throttle butterfly more open is gold. Along that same line, am I correct to say that clockwise rotation of both the L and H screws reduce fuel delivery through their respective passages? I can see how you want to run a little on the rich side, to avoid a lean seize situation. When running a little rich, increasing fuel even more will slow rpm.
Mike, this is a great video bro....your demonstrating with sound and explanation all lends tremendously to the heightemed effectiveness of what you're communicating here. Great job, man.
Great video! I found it because I didn't know what the H and L adjustment pins on my trimmer are. Mine look like pins, not screws, so are those just the caps and the actual screws are underneath? The other issue that brought me here is that the engine is leaking at or near the muffler. I can't tell exactly where but it seems to be spurting out in that area because it splatters on the inside of the housing in the area of the muffler/spark arrester. Not only spurting out, but also enough to where it's dripping. The make/model is Stihl KM56 RC. I'm not sure if it's worth disassembling to look for any glaring damage/breakages to fix that or replace the carburetor. I don't see you responded much to comments, but I'm hoping you could hook me up with a little input from your skill and knowledge base. I really don't want to buy something new if I can fix this and I would always prefer learning how something works so I can fix it, rather than trashing it, and 2-cycle (or any for that matter) engines are definitely a knowledge gap for me. Thanks for your time! 💯
mike, you're the shit. this video is A1, and the cookie cutter cuts and graphics somehow make it even easier to follow. i loved it this is exactly what u need to watch if you want to understand how 2stroke power tool carb adjustment screws work on any powertool. fuck yeah
Yea nice job. A+ for not saying "whatsup guys don't forget to hit that like button and and subscribe." Also an extra plus for not trying to make comedic bits on equipment videos. Subbed. I have to check I have the big 4 (stroke or whatever) Stihl whackers that die intermittently. Will work for half a day perfectly, and then die out, or it will die out at the last 100 foot section of an acre property. 2 stroke trimmer with problems of super high pitch while full throttle. Not good. Hopefully this is the fix after no restults from spark arrest and air filters and carb cleaner. PS sooo many ads on youtube now it's ridiculous.
Generic adjustment is usually 2 turns out from stop on the low side adjustment screw. Readjust when the brush cutter warms up. i.e. if the adjustment is lost for any reason, lightly screw the low end adjustment screw all the way in till its stops then screw it out 2 turns. This is an about or approximate adjustment.
@@bc-mr1siit’s the fuel/air mixture screws. Like on any carburetor. Ever heard of a pilot and main jet? I’m betting not lmao one controls idle, other controls wot. Stick to coloring books.
The screws affect the mixture or the volume? Always thought the mixture screws add more or less gas at a idle or WOT path? Not just rpm going up or down. First setup would be High screw and Low screw at 1.5 turns off the seat?
Mine idles perfect and runs at top end perfect, but what would cause it to bog when I squeeze full throttle? It’s brand new, just bogs going from low rpm to high
Great video. Best! Seems like the idle and low speed need to be adjusted in parallel. My edger blade spins when idling. Not super fast fast enough to be dangerous. Is that a low adjustment or idle adjustment or both? Thanks!
I’ve been working on a fs55rc and when running, the idle speed is through the roof, almost to where it could cut grass without even hitting the throttle. When turning down the idle and practically having the adjustment screws falling out of the weedeater, it still idles the same. Any ideas?
Just for my education, when you are turning the screw out , (e.g turning slow speed CCW) how is the air fuel being affected ? More fuel? More air? I.e are you making it more rich or lean ? TY!
Still doesn't say where a good starting point is. As-in how many turns out for each screw for initial startup. Everybody knows what the screws are for... Locating the “hi” screw, proceed to turn it counterclockwise exactly one turn and a half. You will need to turn the “Lo” screw one complete turn in the counterclockwise direction. Now locate the Weed Eater choke and pull the cable out to start up your engine. The engine, at first, may sound rough when attempting to run, but you need to keep it running. This can easily be worked by using the gas throttle. In order to make a proper carburetor adjustment, the Weed Eater engine needs to be warm.
Is the adjustment of the LA screw affects the L(idle speed) and H(power) of the engine?, i have a stihl fs120 trimmer and no matter i try to adjust it by following your tutorial it's still not working, any other sugestion?tnx!
I messed with the H and L screws before watching this videos. How do I get it to a base setting? I cannot get it to run now unless it’s on partial choke. Soon as I pull the throttle it dies
@Drew Rushlow no it’s turn close wise until both are seated(not tight) then back out 1&1/4 turn on high and low side. That will bring you back to baseline and you can adjust it from there.
@@6atlantis that's making the assumption he's running a stihl, they use a 1 1/4 set point but many do not. I have some that are 2 1/4 +or- and on some the 2 screws have separate settings. Best thing to do if you don't know (and can't find out) is to let the machine set and be cooled. Start with both screws at 1 1/4 turn out. If the machine doesn't start within 2-3 pulls go up in 1/4 increments til it does start. Tune it up and then let it set a while to cool down and try to start again if it doesn't start within 2-3 pulls you need to retune or figure out what the problem is- bad filter, line, dirty carb, or a vacuum leak. 1st thing I always check is for the leak when a machine I tuned doesn't wanna run right after I tuned it.
@@terryhay2029 You may have figured it out by now.. I had this problem today and I cleaned the spark arrestor on the exhaust and my hedge trimmer started right up.
Hi please I need you help the engine stop time ti time when am using it for work what can I do please I need enlightenment on this issue.Thanks from Italy
Hey so i have a brand new sthl weed wacker fs 91 . And for some reason i fucked with the bottom black screw you’re talking about and ever since my trimmer is fucked up. It spins without me pulling the trigger, when i pull the trigger it bogges down and goes super slow, but if i hold it down long enough eventually it will pick up speed and go full throttle, but it’s annoying walking around with the trimmer going 100 % not to mention dangerous. So when i let go of the trigger i have to repeat the process. Mind you it’s a new trimmer. Any ideas ?
i got absolutely nothing from this video,,, you never said anything about what i am listening/looking for ,, you told us turning the screws increases and decreases the speed,,, heck i already knew that !
Does anyone know what factory settings are for the high and low. I started turning like a dumbass before I watched this video and don’t know what to do now
Glad to see some one explaining how to adjust the carburetor without confusion. Thanks!
Succinct and to the point, THANK YOU! So many people drone on and on and on about stupid crap unrelated to the video. THANKS for NOT doing that. GREAT VIDEO!!
I adjusted my fs 90 with no problems after watching this video. Thank you. I noticed I had a missing nut holding on my carb which I replaced and that was probably half my problem with it not running right. I was able to set the high speed adjustment so it spins like it should at full throttle and I was able to adjust the idle so the head doesn’t turn anymore when it is idling. I was just about ready to buy a new weedeater. Thank you
Awesome! Video helped me too!
Thanks for taking the time to explain in detail. You would be surprised how many dummies there are trying to teach!
Everyone on UTube is an expert.
Perfect explanation and demonstration of how to get these adjustments done.
Great video! All my questions were answered. I'm sad he isn't active anymore...😢 Come back and teach us more!
VERY HELPFUL: simple, to the point, covered all adjustment points. Thank you
You helped me a lot on this . I have a 133 and it would start and die . I adjusted the idle and problem solved . Thanks
The way you showed how the T screw simply pushes the idle resting stop to hold the throttle butterfly more open is gold. Along that same line, am I correct to say that clockwise rotation of both the L and H screws reduce fuel delivery through their respective passages? I can see how you want to run a little on the rich side, to avoid a lean seize situation. When running a little rich, increasing fuel even more will slow rpm.
Great video, thank you so much. This changed my effectiveness and pure understanding of what I'm doing with power equipment. 🔥🔥🔥🔥🔥
Finally an explanation that was easy-to-follow and he had my attention 😊
Most helpful straight forward video. Skip the others. Thank you.
Thank you so much. You're so helpful. Watching from Papua New Guinea
Exactly what I was looking for, thanks
My 85 head was spinning fast when I start I will lower it give thanks for your assistance 💯
Mike, this is a great video bro....your demonstrating with sound and explanation all lends tremendously to the heightemed effectiveness of what you're communicating here. Great job, man.
Your video is by far the best, Mike!
Greatest video for adjusting a carb
Great video! I found it because I didn't know what the H and L adjustment pins on my trimmer are. Mine look like pins, not screws, so are those just the caps and the actual screws are underneath? The other issue that brought me here is that the engine is leaking at or near the muffler. I can't tell exactly where but it seems to be spurting out in that area because it splatters on the inside of the housing in the area of the muffler/spark arrester. Not only spurting out, but also enough to where it's dripping. The make/model is Stihl KM56 RC. I'm not sure if it's worth disassembling to look for any glaring damage/breakages to fix that or replace the carburetor. I don't see you responded much to comments, but I'm hoping you could hook me up with a little input from your skill and knowledge base. I really don't want to buy something new if I can fix this and I would always prefer learning how something works so I can fix it, rather than trashing it, and 2-cycle (or any for that matter) engines are definitely a knowledge gap for me. Thanks for your time! 💯
Addressed all of the things that were giving me problems. Well done sir
Thank you for this explanation. Very useful and complete.
mike, you're the shit. this video is A1, and the cookie cutter cuts and graphics somehow make it even easier to follow. i loved it this is exactly what u need to watch if you want to understand how 2stroke power tool carb adjustment screws work on any powertool. fuck yeah
followed your instructions, now works like a charm!!! thank you so much!
Great video, simple and informative, I learnt a lot...thanks very much.
Thankyou Mike, Great explanation, adjustments made to the high speed, much better. Have a great Xmas and new year. Best Wishes from Tim in Australia
bro, you the man. this really helped saved a ton of time and effort figuring this out. thanks
Ok Mike thanks for the quick reply I will have a look
Yea nice job. A+ for not saying "whatsup guys don't forget to hit that like button and and subscribe." Also an extra plus for not trying to make comedic bits on equipment videos. Subbed.
I have to check I have the big 4 (stroke or whatever) Stihl whackers that die intermittently. Will work for half a day perfectly, and then die out, or it will die out at the last 100 foot section of an acre property. 2 stroke trimmer with problems of super high pitch while full throttle. Not good. Hopefully this is the fix after no restults from spark arrest and air filters and carb cleaner.
PS sooo many ads on youtube now it's ridiculous.
Brilliant nice easy to follow guide! what a winner
Perfect info, very concise. Thank you.
Clear, simple explanation, thanks
even tho I have the old 480 series (same carbi) this was just what I needed to retune it after its tare done and clean
Thanks man had my uncles fs160 sitting for while and tuned it!!
best explanation i see so far thanks mate
Thanks for your help Mike! 🙂 Remember that God loves YOU! 🙂
Thanks again for your help Mike 🙂
Generic adjustment is usually 2 turns out from stop on the low side adjustment screw. Readjust when the brush cutter warms up. i.e. if the adjustment is lost for any reason, lightly screw the low end adjustment screw all the way in till its stops then screw it out 2 turns. This is an about or approximate adjustment.
The high and low screws are actually to lean or enrich the fuel mixture, not rpms
incorrect. one is for idle the other for wot 👍
You adjust the mixture, which in return changes torque and rpm. Not a pro, but ya.
@DuFFR32T you are correct. @bc-mr1si 's comment is from a guy that heard a 1st grade explanation at the hardware store....
@cap10moman .what are u smokin 😀.I've tuned many small 2 stroke engines. one screw controls idle the other wot.
@@bc-mr1siit’s the fuel/air mixture screws. Like on any carburetor. Ever heard of a pilot and main jet? I’m betting not lmao one controls idle, other controls wot. Stick to coloring books.
Amazing! Thanks very much!
What size adjustment screw is this and what’s it called? Where can I get one? Thanks
Great detailed video, Thank you
Brill ,well explained
Grasias muy buen video 👍🏽
Thank you for going strait to the point,
The screws affect the mixture or the volume? Always thought the mixture screws add more or less gas at a idle or WOT path? Not just rpm going up or down. First setup would be High screw and Low screw at 1.5 turns off the seat?
VERY informative. thank you
Great video!
Mine idles perfect and runs at top end perfect, but what would cause it to bog when I squeeze full throttle? It’s brand new, just bogs going from low rpm to high
Greta video, thanks!
Hi, Great video, but could I just ask what size screwdriver socket you are using for adjustment? Thanks
4mm hex head. They sell them on Amazon, as well as kits with several others. Just search “stihl carburetor adjustment tool”
Great video. Best! Seems like the idle and low speed need to be adjusted in parallel. My edger blade spins when idling. Not super fast fast enough to be dangerous. Is that a low adjustment or idle adjustment or both? Thanks!
You solved my problem sir😊 thank you.
Thanks it-helped with what I needed
Very well explained. Thank you
Thank you so much!
Tips on getting the restrictive black caps off?
Very good video
Nice job!
Not a mention of rich/lean?
Thank you why does it take 6 videos to get this info!
Thanks bro big help.. Thank you bro 🙏
Great video thanks
Thank you, very good video.
Best video ever 🎉
I subbed, thanks for sharing, awesome video!
THANK YOU!
I’ve been working on a fs55rc and when running, the idle speed is through the roof, almost to where it could cut grass without even hitting the throttle. When turning down the idle and practically having the adjustment screws falling out of the weedeater, it still idles the same. Any ideas?
Did you ever figure this out? I’m fighting the exact same problem right now
No never, still looking for a fix
Very clear Thanks a lot
Just for my education, when you are turning the screw out , (e.g turning slow speed CCW) how is the air fuel being affected ? More fuel? More air? I.e are you making it more rich or lean ? TY!
Excelente vídeo verry infomative A+++++
스틸 55T 모델로 고민 중 이었습니다.
감사합니다
What I was looking for
Still doesn't say where a good starting point is. As-in how many turns out for each screw for initial startup. Everybody knows what the screws are for...
Locating the “hi” screw, proceed to turn it counterclockwise exactly one turn and a half. You will need to turn the “Lo” screw one complete turn in the counterclockwise direction. Now locate the Weed Eater choke and pull the cable out to start up your engine. The engine, at first, may sound rough when attempting to run, but you need to keep it running. This can easily be worked by using the gas throttle. In order to make a proper carburetor adjustment, the Weed Eater engine needs to be warm.
When adjusting counter clock wise, does the low end screw decrease or increase the mixture?
Would this being out cause the air-filter to get wet with fuel? Or, would it be the fuel-tank vent? 👍
Often caused by the vent, but could be carb.
This was helpful
Is the adjustment of the LA screw affects the L(idle speed) and H(power) of the engine?, i have a stihl fs120 trimmer and no matter i try to adjust it by following your tutorial it's still not working, any other sugestion?tnx!
Starts. Runs. Dies after 10-20 secs idle. I'll try this first, then I'll assume my fuel filter may need replacing.
Thanks.
If the high screw is open only half circle , will the engine burn?
Forgive my english
U da man
Perfect! TY!
I adjust all three and still won't idle. Cuts off as soon as I let off the gas trigger. New plug just installed. Any ideas?
I messed with the H and L screws before watching this videos. How do I get it to a base setting? I cannot get it to run now unless it’s on partial choke. Soon as I pull the throttle it dies
@Drew Rushlow no it’s turn close wise until both are seated(not tight) then back out 1&1/4 turn on high and low side. That will bring you back to baseline and you can adjust it from there.
@@6atlantis that's making the assumption he's running a stihl, they use a 1 1/4 set point but many do not. I have some that are 2 1/4 +or- and on some the 2 screws have separate settings.
Best thing to do if you don't know (and can't find out) is to let the machine set and be cooled. Start with both screws at 1 1/4 turn out. If the machine doesn't start within 2-3 pulls go up in 1/4 increments til it does start. Tune it up and then let it set a while to cool down and try to start again if it doesn't start within 2-3 pulls you need to retune or figure out what the problem is- bad filter, line, dirty carb, or a vacuum leak. 1st thing I always check is for the leak when a machine I tuned doesn't wanna run right after I tuned it.
@@latestplague3762 He is running a Stihl in this video, and 1&1/4 turns is baseline for 99% of 2 stroke trimmers.
@@6atlantis Excellent. I'll try this because I cant get my Stihl trimmer to even start let alone enjoy the luxury of tuning it!
@@terryhay2029 You may have figured it out by now.. I had this problem today and I cleaned the spark arrestor on the exhaust and my hedge trimmer started right up.
I have same and I trun that alway up and wen I used they seems like lose power so I might Ned to adjust that
Cool! Thank's dude!
How do I stop my string trimmer from running too lean?
Hi please I need you help the engine stop time ti time when am using it for work what can I do please I need enlightenment on this issue.Thanks from Italy
For some reason my trimmer idles at full throttle with the LA screw almost falling off cant figure out why
Thanks!
Thanks bro
What is the size of that spanner?
What is the diameter of the carburetor adjustment screw?
28
4 mm hex for H & L
.
Small straight screw
driver for IDLE
Hey so i have a brand new sthl weed wacker fs 91 . And for some reason i fucked with the bottom black screw you’re talking about and ever since my trimmer is fucked up. It spins without me pulling the trigger, when i pull the trigger it bogges down and goes super slow, but if i hold it down long enough eventually it will pick up speed and go full throttle, but it’s annoying walking around with the trimmer going 100 % not to mention dangerous. So when i let go of the trigger i have to repeat the process. Mind you it’s a new trimmer. Any ideas ?
How about high and low adjustments.?? Special tool? A 10 yr old could figure out the idle
Just bought a new fs300 an it won't stay on idle
My wheel keeps spinning ( not in idle) please help
Weird I only have 1 screw. ??
i got absolutely nothing from this video,,, you never said anything about what i am listening/looking for ,, you told us turning the screws increases and decreases the speed,,, heck i already knew that !
Good for you! Obviously this video wasn’t meant for you if you already knew everything in it.
Does anyone know what factory settings are for the high and low. I started turning like a dumbass before I watched this video and don’t know what to do now
I’m at the same point pal lol that’s why I’m here
Trimmer need valve check
But this should help