Congratulations. I've also been a small engine mechanic for 50 years. So I went through all the service schools of the different companies with a diploma. Stihl, echo, husqvarna, honda, kawasak, yamaha, etc. and I've seen so many so-called good mechanics adjust carburetors so stupidly, but you know how. You must first adjust the low speed and as you did by turning the needle slowly and find the RPM select and enrich a quarter turn then do the same with the high speed needle. Also, as the 2 circuits add up at high rpm, it is essential to adjust the low speed first because if the low speed is comming more lean after adjusting the high speed, the total mixture will be too lean . CONGRATULATIONS you are the first on youtube and even in the shops that I see adjusting a carburetor in the right way!!

You saved me! Ready to take my MS 250 Stihl to the repair shop because it wouldn’t start. But I cleaned the carburetor as you instructed and put the new 91 octane ethanol free gas and dumped out the old gas. Now she’s running great. Thanks man!

Great help video! Cleaned my first carburetor with your help.

great video bro! gave me the confidence to take my saw apart and do a detail! having a problem with the saw just cutting out straight after it fires up, I'm thinking either bad fuel, blocked fuel line / filter or dirty carby. either way i feel more confident tackling the job now i've watched this video! thanks!

I have 2 ms250s, 16 +18. Older 16inch is a bear to start. The other one is a totally different saw. Never fails.

Thanks a lot, that was full of everything I needed and well presented. I owe you one!

Excellent. Very helpful and informative!

Greetings! To dismantle the throttle rod, it is not necessary to remove the upper cover that covers the throttle trigger and throttle block. To easily remove the rod, it is enough to set the choke control lever to the operating position, press the gas and pry the rod with a slotted screwdriver

good vid on the MS250. My 250 is a '10 model was doing the same thing and just last month I had to clean/replace pump and diaphragm. Its a tough little saw for cutting a few ricks a winter and other clearing projects around the place. Note to self when making a vid; place camera where arms/hands don't block...and turn the back ground racket off (radios).

Awesome vid, getting my saw ready right now with all these fires here in Oregon going on. Figured this was needed my STIHL doing same this idles. Bogs when ya hit it. Thanks man liked subscribed ✅

Very good information on this video. Thanks

Great explanation! Thank you.

GREAT Pro Video ! Thanks

Your 250 started a lot easier than any ms 250 I have ever owned. They have a propensity for flooding. Since yours was so lean it started easy but had no acceleration or idle. I would have replaced the fuel filter, first, and richened up the low jet a bit before jumping into the carb. If I have to go into a carb then I clean it and and replace the diaphragms. My carbs stay pretty clean because I use nothing but PNE gas and Stihl Ultra oil or Stihl Moto Mix.

5/16 socket will fit carb stud nuts, handle cover does not have to be removed to release throttle linkage press on throttle to move linkage forward and pluck out of slot, you will have minor resistance but I’m sure you can cope with it😎

Mine is doing this exactly. Then once it does this it wont start again. I got a carb rebuild kit for it but havent gotten to working on it.

I have an ms 250 and it was doing the same thing, It would run for a few seconds then begin starving like yours was doing,.. so I filled it all the way up and then it would run for a lot less time before bogging, I accidentally left the gas cap open, cranked, it and revved it up and and ran great, so I left the cap open and finished what I was doing with gas leaking out,.. brought a new gas cap and it did fix it.

lol, light duty home owner saw that pulls like a bear!!

Impressive!!! you make it look easy and thanks for the adjustment stuff at the end too.

Great video

great video

Thanks. I have an older 032 AV. Thinking it's around about an 84 or 85. Mine is doing what your was doing. Sometimes it would Rev up fine but as soon as I tuch the log would just fall on its face and die. Sometimes I can make two cuts no problem Sometimes can't even start the cut. Took the carb apart had what looked like saw dust under the diaphragm. I cleaned that out. Other side looked good but I didn't know about the two jets. Might still be my problem. Seems strange that sometimes it runs like it should and sometimes nothing! Thanks

Like some mechanics on 4 stroke engines like briggs & startton on snowblowers and others whose up and down revs are jammed to upset the governor and spring settings rather than adjusting or cleaning the carburetor lol

U guys should see how we use the ms250 to cut down Pine trees in South Africa

EXACTLY what i needed! Thank you!

Excellent explanation on setting the H and L screws. How do you set the idle speed (LA) screw, and does adjusting the LA screw effect/require further adjustments to the H and/or L screws? Thank you!!!

So was everyone like hey I can clean my carburetor now with this video until he mentioned the carburetor cleaner machine that not everyone has ... like great I guess I’ll be taking it to a shop

Informative! The solution in the ultra sonic cleaner, it that something special, or just e.g. water and some soap?

I have an ms250 that hasn’t been started for nearly a year. Can’t get it to start so I figured it was a fuel / carb issue . Disassembled and saw that the diaphragm at 8:00 has no “bounce” like yours does - it’s very thin and flimsy. This won’t work like it should right ? I figured it could be replaced but I’ve just ordered a new carby anyway, since I don’t have an ultrasonic cleaner.

My chain continues to spin at idle, I have turned the idle down and it will either still move the chain or it will stall from low idle

Great video, but what do I do if I don't have an ultrasonic carburetor cleaner?

What about the spring that belongs in the carb thats sitting next to your utility knife?

I just picked up a MS251 and it runs exactly the same. The carb limiters were removed and exhaust was ported... because these mods were done does the fuel mix differ also? Thanks!

Hey machinenmetal, great video, thank you. I am having similar issues on my Ms250. What liquid you use in you ultrasonic cleaner? Just water or something like simplegreen?

No need to take handle apart just give it full throttle and pop it off.

Good vid. Since I, nor most don't have an ultrasonic cleaner in their shop, is there an alternative way of cleaning out the carb? Thank you.

Mine has some kinda plastic sleeves over the top mixture screws. I can't figure out how to get my adjustment screws out.

Lol my 250 Has an 18 inch bar on it starts every time and eats there anything I go at trees that are 24 inches around with no problem just Gotta know what you’re doing the word bosses are right but love the 311

Anyone know what the metering lever setting is for the Walbro car on these MS2590s? (The spring lever hightnthat the fuel metering diaphagm sits against.) Just rebuilt mine and discovered on the Walbro website that part number 500-13 is needed to set it properly. No actual measurement/setting done during this video.

Mines wasn’t starting if it did it wouldn’t idle of long so I thought it was the cab when i sprayed gas in the cab it starts ,do you think its the cab ?

It’s pretty damn heavy duty for a homeowner saw!!

Bit of a pickle here... I took the needle screws out of the carb to clean them but they look different and I'm not sure which one is which!

Please make this video again.

What year is the saw ?

Less than 3 hrs on mine from new. And here I am And that is exactly what mine sounds like, but worse..

Let my just but out my ultrasonic carb cleaner that everyone has lol😂

I don't know how to turn exact h an l

How about cleaning that puppy up. It may not run any better but it will last a lot longer

Yeah, but how do you clean it without an ultrasonic carb cleaner? Not everybody has one of those. Lol

That is not a Stihl carb unless someone had removed the limiters from it before you got it. All Stihl carbs have limiters.

Dude thanks for the vid and realistic setting good info completely. Fk the rest about dangerous setting and the cleaner -_- you may not get everything without the cleaner but some air or carb cleaner can is fine. If you can't figure out what to do with this vid, take it to a shop you might damage your saw......

Nga bisa baha ingris

No need to remove the throttle cover.

will somebody let me borrow their supersonic carb cleaner?

That is a loud ultrasonic cleaner

Yeah, that saw does have “a bit of a problem”! It’s filthy!!! Lol.

Sound Garden AAAAAHHHHH

I would assume that is someone owns a “ultrasonic carb cleaner” they wouldn’t need this video would they.

Or new carburetors only ten bucks

Thanks for the help, you need better shot views your hands don't let us see what you're doing

Sir you have a propane heater next to you and you are using carburetor cleaner and gasoline blowing right next to you that's so dangerous and showing a video I think you should be a little bit more careful. It's only my opinion no offense.

It’s pretty damn heavy duty for a homeowner saw!!