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Husqvarna "965030298 - 455 Rancher, 20"""" Gas Powered Chain Saw, 3.4 Cuin, 56Cc, 2" Questions & Answers
Chain tensioner stuck
The screw may be cross threaded. The pinion gear could also be damaged. I would recommend replacing them as a set.
4/27/2015 7:44:17 PM •
Husqvarna...
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Answered
on Apr 27, 2015
What is the gas / oil ratio mixture for husqvarna 455 rancher model ?
50:1 that's 2.6 ounces of 2-stroke oil (preferably with fuel stabilizer) to one gallon of gas. I recommend using 89 octane gasoline for all small engines. It has little or no ethanol in it, as opposed to the 10% typical in 87 or 86 octane fuel. This will prevent a lot of fuel issues, especially if you are not using the tool daily or at least weekly.
8/4/2014 11:57:52 AM •
Husqvarna...
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Answered
on Aug 04, 2014
Where to get rings for Husqvarna 145bt?
The problem is that the engine is a funny size at 40cc. If it was 50cc, you could get away with motorcycle rings. The normal way to size rings is by measuring the bore with an inside micrometer across left to right and then again front to back. The front to back measurement is often a little more worn. Then you order rings by diameter and thickness, Any local engineering company can do this and supply you with generic rings.
There is a different model here with rings at $25 but Jack's Small Engines is $57. My advice is get the OEM ones. You will also need to hone the bore lightly to dull the polish. Oil the new rings with 2 stroke oil when fitting them.
https://www.google.com/search?q=husqvarna+145bt+piston+rings+size
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Husqvarna 125b keeps flooding and will not start...why?
Weak spark or no spark or spark at wrong time. Do not use a neon type spark tester as it will indicate spark when it is insufficient. Use an inline gap type tester.
To test for spark, compression, and timming, drain all the fuel, choke off and give the the starter several pulls. If the plug is wet, leave plug out and give it several pulls, reinstall plug and give it several pulls, then check plug. Repeat until all residual fuel is gone and plug remains dry.
Now that all fuel is gone you can use an alternative fuel, i.e. starter fluid, that won't flood the engine.
Air filter removed, hold throttle open and spray a 1 second burst directly down the carburetor throat, release throttle. Leave air filter off and promptly attempt to start, several pulls. If no fire then it's likely a spark or compression issue, not the carburetor.
If it fires and runs for a few seconds, then timing, compression, and spark are OK and carburetor remains suspect.
Comment for further assusrance.
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