Question about Husqvarna Chain Saw 20" Bar

3 Answers

Husqvarna 359 Low speed running

I have a Husqvarna 359 saw which I purchased online about 3 years ago. As
for use, I am just about through the first chain.

The last two times that I have used the saw I noticed that after about 5
minutes of running the motor would not stay running at a low speed. Say
something less then 50% throttle. To get it started required choking at
about 50%.

Below is what I have done to date.

The last time I used it I checked the jet settings and adjusted the high
speed to its max open, to no avail.

Stopping the saw for 5 to 10 minutes restores it to a normal state. It
will start up and idle.

I started out to remove the carburetor until I figured out it appeared to
be a major effort. I did remove the top cover to the pumping diaphragm
and every thing looked good there. Same for the fuel hose in the tank,
looks good. But still the same problem. Saw runs strong for the first
few minutes.

Having thought this through a bit more it would appear to me that its a
fuel delivery problem. Which for me means a diaphragm, hose or seal on
the crank case. But again I was after a quick fix looking for debris in
the carburetor jets, and still would be if I can figure an easy way to
remove it, just because its easy to do compare to the rest.

Any thoughts?

Posted by on

  • wrvyn Feb 25, 2009

    I have two 359 husquvarna's and after their first year are having the same issue. They are hard to start, and then after mere moments die if not throttled or choked. I rebuilt the carb on one thinking maybe the needle valve was sticking or one of the diaphrams were damaged, also flushed the tank, changed the fuel filter and the fuel line. Now it starts but spits fuel out either the compression release or the muffler???? My brother has one as well that did the same thing. I am running out of ideas!

  • dutchcreek Mar 20, 2009

    I have a Husqvarna 359 that was starting hard, then would not idle. I tried new fuel and air filters and fuel line as it obviously was not getting fuel. Took it to the dealer and he said it has "lean seize" and a ruined piston and cylinder. This on a saw that has ALWAYS run on husqvarna oil and the proper gasoline with less than 100 hours on it. It is 18 months old and he is refusing to do anything warranty wise-even though any of the other causes of "lean sieze" would be crankshaft seals, or other seals making it run lean-and there is no reason these shouyld be bad on this new of a saw.

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A lot of 2 cycle engines do not run very well if they have been put up for a long period, (say for winter) with gas in the engine and carb. I finally learned the hard way that if you empty the gas tank and start the normal way and use up the fuel in the lines and carb, you don't get the residue build up from gas that has deteriorated over time.
Suggestion: empty the fuel out of the tank and run it dry by starting. g\
Get some gas stabilizer and add to fresh gas, fill the tank and run a few times. It will take awhile but you can gradually get rid of any residue build up

Hope this helps. Loringh ps Please leave a rating if appropriate Thanks

Posted on Dec 03, 2008

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Read a number of posts on arborsite that this problem likely stems from the clamp holding on the carburetor. Clamp is plastic and stretches over time causing a air leak, Understand they recalled this part and have replaced with a more traditional metal clamp.

Posted on Jun 03, 2010

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Check your in tank filter. There could be debris in the tank. Running for 5 to 10 min. could draw the debris to the filter and clogging it and letting it sit for a little while could let the debris settle. Just a thought.

Good luck

Posted on Jan 15, 2009

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