Question about Husqvarna Chain Saw 20" Bar

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When I start the motor it runs on high idle and the blade starts to spin without hitting the trigger... When I hit the trigger it sputters and turns off...

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I don't know if your saw has adjustable needles on the carb, but if it does, the "low" side needle needs to be turned counterclockwise about 1/8 to 1/4 turn. THis will richen up the idle mixture which will take care of the sputtering, and should also bring down the idle speed.

Posted on Nov 20, 2009

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Hi I have a stihl ts420 it works well and it cuts but the blade won't stop when it's on and it keeps spinning when I'm not holding the gas how can I fix that problem??

I don't know what all these people are talking about. If your saw is used frequently and not new anymore, it's very likely your clutch springs are worn to the point where they no longer hold back the clutch shoes from coming in contact with the clutch drum anymore and at ANY rpm, they contact the drum and cause it to spin. This also happens often when the saw is given throttle when the blade is binding, it wears the shoes and causes heat which weakens the springs. I'm not positive it's this, if you have ever tinkered with the carburetor it's possible it's idling too high yes, but I'm fairly certain that the clutch springs are worn or stretched out or perhaps one may be broken. This is why string trimmers sometimes keep spinning when the motor is at idle. Start the saw and let it get to operating temp, then without giving it any gas, lower the blade to a hard surface and see if it keeps running or if that stops the motor. If it stops immediately, it's a fair bet the clutch needs replacing.

Sep 19, 2014 | Saws


Chainsaw tune-up

When you buy a chainsaw the carburetor is set to run at sealevel basically. The fun thing about chainsaws is you can go to the top of the mountain and cut firewood. There is a lot of difference in elevation so the carburetor settings you use at your house might not run good at the top of the mountain so it is benificial to know how to quick tune your chainsaw.

You need to set the mixtures for the carburetor. There is usually a rubber grommet on the side of the housing near the carburetor. You will find a Low and High adjustment screw. The default setting for the H and L carburetor jet is usually to turn them in all the way till they stop and back them out a turn and a half. You should start the chainsaw and warm it up untill it will run without choking. Make sure that the air filter is cleaned. Start by turning the low adjustment screw out. You will notice that the rpms should start increasing. keep turning it out until the rpms start to drop then turn it back in a quarter of a turn from where it idled at the fastest rpm. At this point you may need to adjust the idle adjustment till the saw idles at a good speed but not fast enough that the chain turns. You may need to readjust the idle speed so the chain doesn't turn during idle. To set the high adjustment screw will require that you run the saw at max RPM. It may be a good idea to get someone to hold the saw so the bar doesn't hit anything while you're doing this. Hold the throttle trigger all the way down and then turn the high adjustment screw in and out until you find maximum rpm. Turn the screw back in a quarter turn. Your saw is now tuned for the elevation you're currently at.

on Dec 05, 2009 | Garden

1 Answer

I have an old remington super 754 chainsaw that i cannot get to run right. it start with starting fluid but then dies. during the summer i had it running and the blade would spin without me even hitting...

Carburetor is probably gummed up with old gas. Try putting carb cleaner through it, let it soak for a few hours and try again with new gas/oil mix. Always drain and run dry when finished using it.

Oct 27, 2013 | Remington Garden

1 Answer

I disconnected my battery in 08 tundra and now it wont idle

disconecting batt resets the computer. now it needs to learn how to set everything to run again. disconnect batt for atleast 60 seconds, re atach, start car it will start and die(dont press gas) do this over and over until it idles (could take up to 10 times). by pressing the gas you make the computer think it is idling to high so it keeps turning down the idle. it will idle fine after reseting computer and starting several times without hitting gas peddle.

Mar 09, 2013 | 2000 Toyota Tundra

1 Answer

Hit fence with blade and now it wont move

Without direct exposure to this model, check the parts catalog, there is more than likely some type of coupler between the engine and blade assembly. Usually they are added for exactly this situation. Worse case senerio, the gearbox for the blades is "toast".

Oct 05, 2012 | Poulan Ght225 25cc Gas Hedge Trimmer

1 Answer

I hit a brick, lawnmower won't move help

check for bent crankshaft at blade connection point. do this by removing spark plug and turn the mower on its side with carburator side up, now spin blade by hand and see if it will spin without a wobble. if it does not want to move, something else inside the engine is damaged and probably not worth fixing. if the blade does not spin true, it is a bent crank and might be able to be straightened by a mechanically inclined person without further damage to the motor. also check to see if the piston is moving while spinning the blade if it will turn at all. R

Sep 02, 2012 | Mtd 22" Yard Machine Push Mower

1 Answer

Jam log in in rottery blade of hp718hv and now the blade will turn after dislodging log motor ran at low idle after turning off now will not start. what do I do next. tried starting few hours later and...

Hard to analyze from your vague description, but I'm guessing this. FIRST OF ALL. NEVER TURN THE BLADE BY HAND WITHOUT DISCONNECTING THE SPARK PLUG. THE MACHINE CAN START AND CUT YOUR HAND OFF!!! That said, I'm guessing you hit something hard that stopped the blade. If your machine is functioning properly, then you probably broke off the timing key, which is under the flywheel on the crank shaft. If so, then you need to pull the flywheel and replace the key, which costs about $2 USD. If you don't have the means to remove the flywheel, then the repair is better left to a professional. If you do, you'll need a wheel/gear puller and get the flywheel off, after removing the top, pullcord assembly and then simply remove the broken key and replace it with the same. Hope this helps and good luck.

Jun 27, 2011 | Husqvarna Garden

2 Answers

Was vacuuming coils/bottom of fridge and my brush hit the fan and now fan is not spinning. Does the fan always spin or only when called for??? HELP HELP

If the compressor...the black can in the running then the fan should be running...
if it is not running when it should be, check the fan baldes, you may have bent one or more of the blades and now the fan is stuck because it cannot turn...
If so, just bend the fan blades back stright so they do not hit anything...


Apr 25, 2010 | Refrigerators

2 Answers

Blade stops going once it hits the metal to be cut.

inside the motor/arbor section of the saw, there is a helical gear and worm drive on the motor. the front of the motor is supported by a bearing in the aluminum arbor section. sounds like most of the bearing balls are disintegrated and the worm disengages when a load is put on it but spins when there is no load. I would check and replace the front bearing.

Oct 24, 2009 | Ryobi Saws

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