Husky question

[Typhoon]

Greetings! I have a husky 350. Its only about 2 months old. I cut an average of about 3 hours per day with it. Well, it has been running great!! But yesterday I noticed it doing something new. At wide open throttle, normally it sounds as smooth as silk. Barely any vibration and just a perfectly smooth hum if you will. But yesterday I was cutting through a large maple and it started doing something different. I will try my best to describe the sound by typing it.. this should be good!!! haha...
Normally it sounds like this at WOT...
weeeeeeeeeeeeeeeeeeeeeeeeee
smooth steady sound like that....
but yesterday it started doing this...
weeeeeeedeeeedeeededededeeeeeee

know what im saying?? some slight, very slight hesitations...and maybe a slight decrease in power, cycling I think they call it. Anyways, the only thing that has changed much around here is temperature. Do you think this is simply an adjustment of one of the two carb screws? I havent tried that yet, wanted to ask about it first before I went jacking with the adjustments. Any input appreciated. And I know you enjoyed the sounds I typed!
-Brad

 

[rborist1]

:Eye:

 

[Weatherby]

The slight hesitation you describe is called 4-stroking, and is what you want your saw to do at full throttle out of the wood. If you dont hear this at full throttle under no load, your saw is set too lean, and you may damage your saw.

 

[Typhoon]

Ok, yes, 4-stroking is what its doing. And yes it does it out of the wood. But is it supposed to do it "in" the wood? It was doing at as I was cutting.. that is what bothered me. Thanks..

 

[Jacob J.]

Sounds like the saw is really getting broken in and needs to be tuned a bit.

 

[TonyM]

The weather is getting cooler, and that would have the opposite effect. After 3 hours use per day for 2 months, you may need an air filter cleaning.

 

[Stumper]

First clean the air filter. Put in fresh gas. If it is still doing it then it's time to learn carb adjustments.

 

[HUSKYMAN]

http://www.madsens1.com/sawtune.htm

 

[IndyIan]

Also it could be that your chain needs sharpening. Or you need adjust the rakers if you haven't done it in a while. My saw would do the same thing in hardwoods until I set the rakers at 25 thousandths again.

 

[Tony Snyder]

I would recommends that you first switch to a new chain and see if the condition persist even with a good chip load in the cut.

If the condition still persist, I would follow the Madsen's carb adjusting procedure. The adjustment may not be as straight forward as some, as you may have to remove the limiter caps and then replace then in a mid adjust range orientation. If you do not replace the limiters your needles may my not stay put (move around from vibration).

After breakin, your saw will now run properly on less fuel (less friction) so you may have a slightly over rich condition. This is better than too lean.

Look at the color of your plug. It should be tan. If black, replace it.

 

[Typhoon]

Well, it has fresh, 93 octane gas in it, 50:1 mix, just put a brand new chain on it, throwing nice big chips so thats not the problem. I think I will try the high speed screw and see what happens. It was cooler for a while but strangely it warmed up for a few days and thats when it started. Oh and I just cleaned the air filter so it should be fine.
Ill try carb adjustments.

 

[HUSKYMAN]

Warmer temps will make the saw run richer

 

[jsikkema1]

Hey Brad

A little no load 4-stroking is OK

Just weard that it happened all of a sudden... Might be a tempurature change and/or related.

don't lean it out too much or you'll squeak it

Jeff