Saw started running wide open..filter was a little dirty,now clean..same problem,got owner manuel out keep backing off idle screw..no difference. checked gas cable in handle. has a lot of play.dont know if lose from carb also dont know how to put the gas cable back to the trigger. I think I know where it goes but how it stays
There is a recall on the UT models, all you have to do is call the costumer service center for homelite. they will give you a number for the closest warrenty center that will adjust you throttle cable free of charge. I went through two UT 10520's before i started researching the problem.
I had the same problem 2 weeks ago. I figured out that the way the cable is engineered, it is holding the throttle open. I actually found that if I pushed down with my knee on the hande and wiggled it, While spraying WD-40 in the cable. Eventually it freed up, and started working right. This saw was assembled in China, and is a prime example of why we should not allow stuff to be made there. The quality is very bad. I have an old 16" XL that still starts better than my new UT10520. I bought the new one because I liked the old one so much. That will teach me. Now I am having a problem with starting it at all, and the manual says "Contact an authorized service center for carburetor adjustment." I should have paid more money and bought a Sthil.
I had the same problem. I had to shorten the cable sleeve and it works great. Now all I have to do is find the stock adjustments for the high and low on the carberator. Had to cut slots into the adjusment screws.
Homelite UT10520 Chainsaw runs wide open. It is not in the throttle. The carburetor is clean as a pin and there are no leaks. It must be in the electronic timing module. I just do not know how it is timed.
Same problem-fixed by opening handle and engine cover, getting access to both ends of throttle cable and spraying motorcycle cable-lube into cable body. After some new adjustments to throttle speed screw, it runs like it should from Homelite. Never buy Homelite again.
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As far as the manuals... you might be able to download them at http://www.homelite.com. (you can click on the link) under customer service, you'll find "owner's manuals). To adjust the fuel/air mixture, start the saw and turn the adjustment screws in or out a little at a time until you get the saw running properly. There is no "set" adjustment... as the saw motor ages, those settings will change. If you make adjustments to the fuel/air screws and the saw stops running and starting, turn the adjustment screws all the way in (clockwise) GENTLY... If you force those screws you will damage the needle valve seats! Turn both screws out one and a quarter turns out, and the saw will start. continue adjusting until the saw runs properly. Have patience... it may take a while to get the saw running to your satisfaction.
I input your model number and found 3 possible matches, "42cc/46cc Chain Saw UT-10520; SUPER 2 Chain Saw UT-10520 or SUPER 2 Chain Saw UT-10520-A".
I opened the first "Ref # 3" on "Figure A" I suspect is what you say is leaking. It is very inexpensive and available. I would order one and inspect it once recieved to determine an installation method. It does not appear overly difficult without the part in hand. Good Luck.
Homelite/Ryobi.com (authorized parts supplier) https://www.gardnerinc.com/recons/disclaimer-lg.php - Agree; Choose “Product Line”; “Select OEM” & “Select Catalog” both to “Homelite Consumer Products”. A drop down list appears; self explanatory from here. The numbers Homelite & Ryobi use do not match the numbers everyone posts. A careful inspection of your saw should find something that matches.
If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck. Lou Thank You for using FixYa.
CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly.
Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run.
Clean the spark arrestor and muffler; if the saw cannot exhale it cannot inhale.
There are 2 wav (sound - idle & full - may not be highlighted) files that I find most helpful, I think you will too.
I am going to inject a little philosophy here. Undetected air leaks and defective fuel delivery systems account for most chainsaw failures. Constant adjustment of needle valves can easily camouflage more serious problems that result in burning up your saw. A sudden need for an adjustment may be indicative of a larger problem.
im no pro but id start with the throttle stop adjustment and the low speed jet.
screw low jet in, till its fully seated, do not force it. then back it out 1 and 1 / 8 turns. this should get it running and ideling.
Start 1.5 CCW from lighty seated then do as the link suggests. Carburetor Adjustment by Madsens.com http://www.madsens1.com/saw%20carb%20tune.htm CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly. Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run. There are 2 wav (sound - idle & full – may not be highlighted) files that I find most helpful, I think you will too.
May be oil port on saw clogged. Remove side cover, remove bar and chain. Remove giude plate if equipped. Check to see if small oil hole on saw is open and clean. You can start the saw with side cover removed to see if oil is coming from oil hole or not. If it is coming from oil hole when running the problem is most likely dirty bar .If bar is dirty check to see that groove is clean and the oil hole along the edge of bar is clean also. The hole is at same end of bar that attaches to saw.