Question about Husqvarna , No.455 Rancher, 20" Gas - Powered Chainsaw

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My 455 Rancher Husqvarna 20 inch chainsaw wont stay running while idling. its a brand new saw. don't know if it needed to be adjusted or if its pre adjusted already. Starts and runs fine but just won't stay on when in use. If it needs to be adjusted how do I do that?

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Carb adjustmwnt requires a special tool and a tacho, the saw is set from the factory for the best emmisions, however it may need a small adjustment, this should be done by a qualified dealer, incorrect adjustments can damage the engine.

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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1 Answer

Rancher 455 wont stay running


you need too adjust the high jet ccw (making it richer) do do that takes
a little work cause you need a special tool but I can help you around that if you like. let me know

Jul 09, 2012 | Husqvarna , No.455 Rancher, 20" Gas -...

1 Answer

I have a rancher 455 and it's not suppling enough oil to the bar. Is there an adjustment for this?


The 455 has a 3 position adjustable oil pump, the adjuster screw is up under the crankcase, sprocket side, you need a flat blade screw driver.

Oct 11, 2011 | Husqvarna 455 Rancher 555cc 35 hp 20"...

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455 rancher runs for about 5 min. than stalls and wont start until cold than problem repeats


Sounds like a fuel problem. Something might be expanding as the saw warms up and is cutting off the fuel or introducing an air leak. Carby may require a new kit and check the fuel line

Jan 17, 2011 | Husqvarna , No.455 Rancher, 20" Gas -...

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Reference the Husqvarna 350 chainsaw. Why does the chain continue to turn at idle? I just installed a new clutch. Adjusting the idle down causes the saw to shut off upon trying to accelerate.


Sounds like the clutch is still grabing. Easy solution is to apply the chain brake at idle to stop the chain turning. Try adjusting the L screw for a smoother idle.

Aug 05, 2010 | Husqvarna , No.455 Rancher, 20" Gas -...

1 Answer

I need to set carb on a husqvarna 455 back to factory


Start with "H" and "L" 1 turn CCW from lightly seated. Then tune for performance like this.
Carburetor Adjustment by Madsens.com
http://www.madsens1.com/saw%20carb%20tune.htm
CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly.
Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run.

There are 2 wav (sound - idle & full – may not be highlighted) files that I find most helpful, I think you will too. HTH
Lou

Feb 21, 2010 | Husqvarna , No.455 Rancher, 20" Gas -...

2 Answers

My 455 starts good and idles fine but wont go wide open it boogs down and misses


Here are a few things to consider :
- fresh fuel ratio 40:1
-new spark plug
-choke not sticking
-air fuel mixture correct
-bar and chain oil tank full, oil getting on chain
-bar sprocket in good shape getting lubed.
Please let me know what you find.

Feb 11, 2010 | Husqvarna , No.455 Rancher, 20" Gas -...

1 Answer

I have a Husqvarna 455 rancher I have been trying to adjust the idle and carburetor but it's still running a little rough. Any Suggestions?


husqs are sensitif for dirt in carb and fuelsystem clean everything real good. airfilter, carb, tankfilter. after building together make sure it can not take false air. start with both screws closed and open for 360 degrees. after that start adjusting. compression must be ok. saw must hang on cord and not go down. good luck lot of work.

Jan 27, 2010 | Husqvarna , No.455 Rancher, 20" Gas -...

1 Answer

I have a 455 rancher i have spark (dont know if good spark) and gas new spark plug and air filter and it wont start.


Check to see if your ignition switch ( on& off) switch still have both wires attached. Common problem with that saw, loose or disconnected wire

Aug 16, 2009 | Husqvarna , No.455 Rancher, 20" Gas -...

2 Answers

My 455 rancher won't maintain power. I have


if its over a year old and you used other than 93 octane, you need to rebuild the c arb, i did an runs like new

Jul 31, 2009 | Husqvarna , No.455 Rancher, 20" Gas -...

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