Hi Jan, are there springs or O-rings on the needles? I need to check what type carb that uses.
If there are only the threads holding/sealing some type light thread locker would work, like loctite “elastic”.
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looks like springs from the rebuilt kit. I would probably put a carb rebuild kit in it. or a just a new carb, which appears to be like 20 bucks.
Carburetor Carb Repair Rebuild Kit For Husqvarna 440E 135 140 Jonsered CS2240 | eBay?
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I see no O-rings or springs around it other than the threads, but it’s a saw I got from my neighbor, so I don’t know what it looked like originally.
I’ve also looked at a new carburetor, but became a little hesitant this spring, when my neighbor asked if he could borrow the saw back now that it was working
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Well, can’t say how this is set-up, but some saws the needles “rely” on the rubber plug that seals the air-box from the outside where the needles could be adjusted.
If using pump gasoline this rubber shrinks and becomes hard, not holding the needles in place. This also happens to the rubber with time, more plastic mixture in rubber nowadays, bad, bad quality.
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I don’t know Jan, but it seems your neighbor is bordering on what we used to call an “Indian giver” before the days of politically correct language.
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I have loaned out several chainsaws over the years that came back non-functional so no more mister nice guy. Pretty much the same with any tools. Especially to my family members. Been a long time since I cared if anyone liked me or not. The dog and my wife do, I think. That’s good enough.
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They don’t show an o-ring or spring on this parts diagram for the adjustment needles, however, it almost looks like there is one according to the picture or the shaft is rubberized. It possibly means they don’t sell the o-ring separately.
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I bought a new carburetor for the 135an Husqvarna, but it didn’t get any better. It doesn’t seem to be getting fuel, I think there’s something that’s causing it not to draw fuel from the tank, turning the adjustment screws makes almost no difference, if I pump a few times it runs right away, as soon as I touch the gas it dies?
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Hi Jan, pinched fuel lines? Filter in tank? Breather in fuel cap?
Could need more closed needles (!) Less fuel.
Air leaks at inlet, crank seals, cracked crankcase or gasket could also make this happen.
Rests of old two-stroke oil in tank, dryed, dissolves only partly and clogs the jets for a tiny moment.
Oh, and sometimes a chainsaw just needs standing on the “shelf of shame” for a while (6 months-3 years) until the owner has new energy to hit the problem solving, this is good for the mentally health, and minimizes the risk that the chainsaw ends up in a swamp. 
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Haha! Exactly 
That’s what happened to my tiny Steel. It couldn’t get enough fuel to run properly no matter how I adjusted the screws. I looked at the intake for leaks, but it was hard to get to with all the plastic. I put it aside for a few months and used only my trusty old Husky 242 saws in the meantime. Tried the little Steel the other day and it suddenly runs as it should again.
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My weed wacker is my main tool this time of year. I’m running 8 month old treated gas in it which is the cause of some poor performance but it will run out a half a tank of gas and then quit. I’m guessing that there is a split in the gas line and it starts sucking air at half tank of fuel. It’s a Stihl and you have to remove a hundred screws to get to where you can see what’s what. Are engineers forced to design stuff like that or do they just do it out of meanness?
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Things are supposed to be complicated enough people head for the bin and go buy new stuff again. The more complicated the more they sell. It’s called market economy. Creates jobs too - in the other end. Someone has to deal with the scrap.
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Guilty as charged JO. I have the same weed wacker hanging up in the shed. The carb got screwed up so I ordered another non-OEM carb on-line and it was wrong. Couldn’t dick around with it at that time so I bought another same model one. I guess I’ll be taking them both apart sometime today. At least I have the one for parts. I’ve had older tools that were not made to run ethanol and the fuel lines tended to get hard and crack. The current Stihl is about 8 years old and I thought that issue with the fuel lines had been solved by then. I can’t really complain. That weed wacker has maybe a thousand hours on it. If it’s not snowing, it’s wacking something.
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I have a bunch of old Husquarna saws. Most of them from the 80s, some even older. The two I’ve been using the most I bought used for $25 a piece 30+ years ago. Never had a single issue, except chains, bars, ropes and one bar bolt. Seems only newer stuff go bad.
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