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

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Rancher 455 starts and runs for a minute then immediately stalls out. What's going on?

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  • Husqvarna Master
  • 7,482 Answers

Hi David
Sounds like you have dirt/debris in your carburetor jets, fuel passages or a diaphragm that is becoming non-flexible.
Check/Clean/Replace your Air Filter, a dirty air filter can make your engine run to rich with fuel.
Also be sure to check and clean your spark arrestor in the exaust,if you have one installed on your engine.
Note: ALWAYS USE COMPRESSED AIR TO CLEAN YOUR JETS AND PASSAGES, VERY IMPORTANT.
Note:Before you disassemble the carburetor:
Write down on a piece of paper or take a picture of how the linkage attaches to your carburetor for later reference when you go to reinstall your carburetor.
Mark each piece with a awl, or some kind of instrument that will make an alignment scratch before you disassemble the carburetor into separate pieces.
That way you will know which way it goes back together when you reassemble it.
Sometimes you can get by with priming the carburetor or by using a very small shot of starting fluid and letting it run a few times like that, and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.
Check you fuel line condition after a while they will degrade and need replacement.
Check/Clean/Replace your fuel filter if you have one, normally they are located in the fuel tank of chainsaws and weedeaters.
When you remove your fuel lines from the carburetor be sure to make a drawing to how the lines are connected to the carburetor or take a picture for later reference.
Normally the big line will be the line the fuel filter is connected to inside of the tank. The smaller of the two lines is the return to the fuel tank from the carburetor after it is pumped thru the carburetor by the primer bulb.
Make sure you are using fresh fuel...and oil if your using a two cycle chainsaw or weedeater with the oil to the right mixture...too much oil as it can cause hard starting and excessive smoking.
If the chainsaw/trimmer is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
The diaphragm may look good and flexible, but it can be deceiving and not act as a fuel pump as it should because it has become too hard and will cause hard starting, start and run and shut off, etc.
When you clean your carburetor, I recommend that you use a lacquer thinner type cleaner to clean and dissolve the lacquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the lacquer thinner because it can dissolve the plastic parts and render them unusable.
Be sure to use COMPRESSED AIR to blow out all the fuel and air passages. The higher air pressure is needed to blow some of the trash/debris from the fuel or air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit, or you could also ask the parts man that you get your kit from.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.
Note:
The little spring inside of the carburetor goes under the float arm.
That is where your fuel inlet needle/float valve is located...on the arm at the end.
Normally there is a small indention in the carburetor base and a small protrusion on the underneath of the float arm where the spring will be in the right position for installation.
The spring will set in the indention and you will install the float arm with the needle/float valve and float rod into position over top of the spring, you will push down until it is in position and then you can tighten the screw that holds the float arm assembly in position.
Once you have your carburetor cleaned/rebuilt that should solve your problem.
Bud

Posted on Oct 18, 2013

  • 1 more comment 
  • David Seagraves
    David Seagraves Oct 19, 2013

    Thanks for your detailed guidance Bud. You have obviously dealt with similar circumstances yourself. I will not be able to tackle this project for about a week due to other obligations. I'll give you and update after I have had time to work on the saw. Thanks so much for your help Sir!

  • Curtis Sewell
    Curtis Sewell Oct 20, 2013

    Your welcome David...hope to hear how you turn out...just take your time, and all will be fine

  • David Seagraves
    David Seagraves Mar 12, 2014

    Curtis - the problem with my 455 Rancher seems to have resolved itself without further work on my part. I have used it a couple of times over the past couple of months and it is no longer stopping after a few minutes of operation. No idea what may have been causing this "temporary" problem! Thanks again for your instructions regarding a resolution to the earlier problem. I'll retain those for later use!

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: my 455 rancher won't maintain power. I have

If you have been running ethnol mix in your saw there is a good chance that your fuel vent line is plugged. Loosen your fuel cap and start saw on its side and see if it runs. If it does you will have to clean your fuel vent.

Posted on Aug 03, 2009

spekgt
  • 60 Answers

SOURCE: 455 rancher chainsaw does not pump oil to the chain

If you look under the machine by the chain you'll see a flat head screw (next to the sprocket) which controls the bar and chain oil flow . Try to turn the screw and check if there's any oil flow to the chain . If not you will need to replace the oil pump (part # 537 10 55-02 which will cost you about $35.00) Hope this help

Posted on Aug 29, 2009

dontbother10
  • 2220 Answers

SOURCE: I have a husqvarna 455 rancher. It was working

Why would you pay for something and then not force them to make good? I have a large bridge for sale, CHEAP. Make you a heck of a deal.
Take it back!!!
Lou

Posted on Sep 17, 2009

dontbother10
  • 2220 Answers

SOURCE: , No.455 Rancher, 20" Gas - Powered Chainsaw: What is the oil mixture ratio for the Rancher 455...

50: 1; You can download an OM here:
HusqvarnaUSA.com
http://www.husqvarna.com/us/homeowner/support/download-manuals/
Enter the 3 digit model number (no XPs, Es, just the numbers)
Serial number decode – useful when downloading IPLs and Manuals
06 1500198
06 = year produced – 2006 (single digit before 2000; please contact Husqvarna for single digit clarification http://www.husqvarna.com/us/homeowner/support/customer-support/)
15 = week produced – March
00198 = 198th unit Husky produced that week

Oil Mix Ratio:
The following ratios have been recommended for the last 10-15 years and is what Husky suggests for your saw..
Dolmar, Echo, Efco, Homelite, Husqvarna, Jonsered, Makita, Oleo-Mac, Red Max, Ryobi, Shindaiwa, Solo, Spear & Jackson, Stihl & Tanaka; all recommend 50:1.
1 gallon of premium fuel to 2.6 ounces of quality 2-cycle oil.
4 liters of premium fuel to 80 milliliters of quality 2-cycle oil.
McCulloch, Poulan & Wen; recommend 40:1.
1 gallon of premium fuel to 3.2 ounces of quality 2-cycle oil.
4 liters of premium fuel to 100 milliliters of quality 2-cycle oil.
Chinese chainsaws recommend 25:1.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

Posted on May 10, 2010

dontbother10
  • 2220 Answers

SOURCE: what is the longest bar i can go on my 455 rancher

Available power and the amount of oil may both be a limiting factors. Your oiler has a 3 position adjustment (as do most intermediate level Huskies) with 20" being the longest recommended. My 359 is virtually the same and I run a 24" Carlton bar on mine with no problem. If you opt for a longer bar let the saw determine cutting speed. Come on over, my bar and chain will fit your saw, try it before you buy it. If you have an acquaintance with a 24" small mount Husky bar that is probably a good idea. I would likely not recommend a 24" bar if regularly cutting Oak or a hard wood, I do a lot of Fir.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

Posted on May 14, 2010

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