Husky 359 cold blooded

ZR900 · February 25, 2015, 06:37:58 PM

I bought a used 359 at a pawn shop yesterday. It's in great shape. Lots of compression. Idles fine. Real cold blooded. I turned the hi speed out to the stop. It's better. I put sea foam in the gas today. Maybe that'll clean it out. I have a 261 I bought off eBay. It wouldn't run at all until I adjusted the jets.

On this 359......is it possible to easily open the hi speed beyond the plastic stop? Is that likely to help?

Thx

ladylake · February 25, 2015, 07:24:35 PM

Try turning out the low adjuster about 1/4 turn. Steve

weimedog · February 25, 2015, 10:45:18 PM

and check the intake boot & impulse line

Al_Smith · February 26, 2015, 05:12:45 AM

Quote from: ZR900 on February 25, 2015, 06:37:58 PM
On this 359......is it possible to easily open the hi speed beyond the plastic stop? Is that likely to help?

Thx

I'm not familiar with the saw but I've never seen an adjustable carb with stops I couldn't defeat .It's kind of an EPA so it can't run too rich and also a warrenty thing so it can't be ran too lean and burn the engine up .

Old trick that works sometime is open up the jets and run it until it clears out the residue of old fuel then lean it back up until it runs correctly .Then too it might just need a new set of diaphragms/gaskets .Next to impossible to trouble shoot over the internet . ;D

ladylake · February 26, 2015, 06:56:32 AM

Most times opening the low adjuster will cure a saw being cold blooded plus it will start better cold, unless the high is real lean or the carb clogged. Steve

ZR900 · February 26, 2015, 07:40:50 AM

It idles fine. It kills when you throttle it to start cutting unless you "catch" it. Once it's up to RPM it'll keep running however if you let it back to idle you have to feather the throttle to get it to go to higher RPM. It acts like it's always cold.

ZR900 · February 26, 2015, 07:41:28 AM

It acts like it needs a touch more gas at higher RPM

ladylake · February 26, 2015, 07:54:27 AM

It needs more gas to get from low RPM to high RPM and that comes from the low adjuster, give it a try. Steve

John Mc · February 26, 2015, 09:53:52 AM

Quote from: ZR900 on February 26, 2015, 07:40:50 AM
It idles fine. It kills when you throttle it to start cutting unless you "catch" it. Once it's up to RPM it'll keep running however if you let it back to idle you have to feather the throttle to get it to go to higher RPM. It acts like it's always cold.

As Steve said, that's a classic symptom of the low speed mixture being set too lean. It has enough to run at idle. The problem is, you need a little extra fuel in there to give it something to accelerate with. Once it's up to speed, you'll be pulling enough through the carb to run it right is the high speed mixture is set correctly. Think of that idle mix as not just running the saw at idle, but also giving it enough extra to start accelerating.

celliott · February 26, 2015, 11:31:16 AM

On the carb limiters, it should be just the plastic tab style ones.
Remove the carb (two bolts, throttle+choke linkage) and take a look at the H and L jets. You'll see the plastic tabs. Either file them off with a flat file or shave them down with an exacto knife. Once you do one you can then remove both jets and smooth them up properly. You can take the plastic part completely off but it's easy enough to trim the tabs down.

Then, enjoy a complete range of adjustablity!

Madsens website has a good sound tutorial on chainsaw tuning BTW.

ZR900 · February 27, 2015, 08:34:31 PM

I increased the idle screw a touch and knocked the little plastic ears off the hi speed jet. I opened the hi speed beyond where it was limited to. The saw runs fine. Not sure which adjustment fixed it or maybe a combination of both.

Towards the end of the day I ran into a frozen clod of black dirt stuck to the bottom of a log I was cutting. That was the end of the fun. Chain was junk anyway. I have a new one for it.

Thx for the help.

ladylake · February 28, 2015, 05:24:31 PM

If you really want to se what the low adjuster does turn it back in 1/2 turn and then see how it runs. Steve

ppxstnr · March 16, 2015, 10:29:08 AM

My 359 did the same thing. Thought I read that the Walbro Accel pump sticks. I put a Zama on mine and it runs fine. Might as well do the intake and pulse and fuel line and filter while you are in there.