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Husqvarna 340 will not idle

I have a Husqvarna 340 that I can't get to idle. It was drained before it was put up, and I have fresh fuel (straight gas - not ethanol) and using Husq. oil for the mix. It starts up OK, but won't idle when the choke disengages. I can work the choke manually to keep it running for about 15 - 30 seconds, but then it cuts out. Not sure if the needle valve adjustment screws need to be adjusted, since the weather is quite a bit colder now than when I used it last? I've played around with them without being able to get it right. Any tips on checking setting the H and L jet adjustment screws and the T Idling adjustment screw might be a big help!

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To set the H and L adjustments, screw them in until they lightly seat. Then back both out 1 1/2 turns. This will get you in the ballpark. They will still need to be fine tuned for proper settings.

Posted on Apr 07, 2017


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Posted on Jan 02, 2017

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SOURCE: Cant get clutch cover off new Husqvarna 235e chain saw

Mine did this when nearly brand new. You likely have a nasty jam of oil and sawdust stuck between the chain brake and the flywheel. It can be loosened by either careful prying of the case or precise shots of carb cleaner up in the housing. While you are in there look for a buildup of oil around the chain brake connection to the kickback paddle.

Posted on Dec 31, 2008

  • 58 Answers

SOURCE: Husqvarna 350 wont stay running?

ok,  The choke is used to change the air/fuel mixture by "choking" off the air that goes to the carburator.  The choke is only used to get the motor running in cold temperatures.  Once the motor is started, the choke must be opened or the motor will flood and stall when you open the throttle.    I hope this solves your problem.  Best wishes, Michael Mittelsdorf 

Posted on Jan 10, 2009

  • 87 Answers

SOURCE: can i ajust chain oil flow rate, to lubricate bar,

No. It is an automatic oiler.

Posted on Apr 10, 2009

  • 41 Answers

SOURCE: I have a husqvarna 340 chainsaw and it will not

Turn the screw labled T in a little. This will raise the idle setting. Heres a link to the manual. Look on page 29 of the .pdf

Posted on Aug 02, 2009

  • 2220 Answers

SOURCE: 25 yr old Husqvarna 266. starts fine, lots power, but won't idle.

I think you have exceded our level of help. Please try here. Chainsaw thread (free to join)

You might read this thread
I searched for "Husky 266" and got many positive hits. She is a respected machine.

Posted on Oct 16, 2009

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Husqvarna 340 chainsaw will only run for a few seconds on choke, tried cleaning carb, carb adjustments do not help. will not run at all with choke off.

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