Question about Husqvarna Chain Saw 20" Bar

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I can not get a steady idle. the saw idle with go high then low and then shuts off.

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Posted on Jan 02, 2017

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SOURCE: i have a husqvarna YTH150 hydrostatic kohler motor

Sounds like fuel starvation, clean the fuel filter and lines, make sure there's no muck in the fuel tank. It's also possible the choke is sticking, although the exhaust would smoke and smell of petrol (gasoline).

Posted on Sep 10, 2010


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42cc 18 inch craftsman chainsaw model 358-351910-18. Saw runs great at idle or while not cutting wood, when starting to cut wood just after the entire bar gets into the wood engine bogs down and chain...

Generally this is a fuel / air ratio problem. Usually it can be solved by a carb adjustment. On the carb there are usually two screws, one marked low or L , the other marked high or H. Low is your adjustment for idle mixture, high is for mixture at full throttle. The saw should Always be adjusted to run well during the cut. Make adjustments a little at a time, then try The saw. Continue small adjustments untill the saw is performing well at full throttle while Cutting.

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How far does the high and low screw need to be unscrewed or screwed in on the carburetor. of the chair saw

The position of the screws is set while the motor is running, The screw nearest the cylinder is the low speed adjustment and the other is the high speed adjustment. Start the engine and adjust the slow screw till the motor idles smoothly without wanting to cut out. Then open the throttle and adjust the other screw till the engine runs at a good, steady speed without over revving. If the setting of the screws has been totally upset, start with the screws about 2 turns out from the stop and work from there until it starts and runs, then you can set the optimal running settings.

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1 Answer

I have a husqvarna YTH150 hydrostatic kohler motor 1995-1999 upon starting it takes many tries then when started its like its on a steady idle it'll idle high then low in a steady rotation until it cuts...

Sounds like fuel starvation, clean the fuel filter and lines, make sure there's no muck in the fuel tank. It's also possible the choke is sticking, although the exhaust would smoke and smell of petrol (gasoline).

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1635AK will not run in high idle

screw back idle and air clockwise fully let them 1 and3/4 turns out that should sort it check brake isint stuck onn aswell

Aug 02, 2010 | McCulloch 16 Inch Gas Chain Saw MCC1635AK

1 Answer

My saw runs fine for about five minutes then shuts off while its ideling. why does it do that and how can i fix it?

If it is a new chain saw, then what it is, is that they set the carb to run a higher idol until the motor breaks in once this happens you have to change the low idle on the chain saw to help balance everything out. Do it in short 1/4 turns until you get it just right. Your owners manual will show you which one is high and which one is low. Please rate

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Husqvarna chainsaw carburetor adjustment

Find the 2 screws. There will be a (h) high and (L) low. These are for hig rpms and low rpms. First tighten the screws. Then unscrew them about 1-1/4 turns. Then start the saw and let it warm up. Start with the high rpms first pull the trigger all the way then adjust the screw in 1/8 turns either way until it is running good at high rpms. Then work on the L rpms. Get the saw to idle then pull the trigger, there should not be any hesitation when going from L to H rpms. Just adjust the low same as the High. They have to work together so if the high is good and the low is not just right turn the h a small amount. If you have any more questions let me know

Jun 11, 2009 | Husqvarna Forest & Garden No.967012396 345...

1 Answer

Screw adjustments for partent consaw k650 super

older partner saws have a high,low and idle screws.the high and low are side by side.the bigger screw below them is the idle screw.first take the high and low screws and run them in clock ways.don't tighten them,just back them out one 1 turn each.then start saw. let saw come down to idle.if saw does not idle turn the ilde screw in until it throttle saw up to full throttle and turn the high side screw in just a touch 1/8 turn,no more.let saw come back to idle and back the idle screw out until the blade stops. all done now. hope this helps,let me know

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2 Answers

My 345 chainsaw bogs down when it hits wood

There are two idle screws one high, and one low. Your high adjustment idle screw needs to be adjusted.

Jan 18, 2009 | Husqvarna Forest & Garden No.967012396 345...

1 Answer

Idle is off??

hi leobowdy

disassembly the carb and carefully clean it.Check the air filter,the fuel line and fuel filter,check the needle,lever,small spring and the screen filter from the carb.Check the sparkplug.
high speed H=2 turns,low speed L=2 1/2 turns,adjust T
When chain saw starts adjust H,L and T accordingly.

cheers savumihai71.

Nov 22, 2008 | Ryobi Factory Reconditioned 18" 40cc...

1 Answer

I relpaced the fuel lines on my Mccullough Eager ****** leaf blow

ok then these are the low and high speed adjusting screws. first make sure the spark plug is clean of buildup or new . what you need to do is first try to get it to idle with the low adj screw. now im not sure which ones which so try one and if it makes no difference during idle then try the other. start it if it dies turn the screw , repeat this until you get the right sound and steady idle.once you figure out the low screw trun it all the way clockwise then turn it counter about 2 turns. then tune the idle from here. you want it to have a steady sounding idle. now the idle sounds good use the high screw to adjust the throttle. give it about half throttle and turn the high screw until it sounds steady here. then go to full throttle and turn high screw until it sounds steady here. now it should sound steady at idle and throttle. and try not to trun the screws more than 1/8 to 1/4 turn at a time,especially the high, you dont want to blow it up. lemme know how it goes

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