husqvarna 357

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  #1  
Old 11-16-17, 04:03 AM
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husqvarna 357

I have a Husqvarna 357 chain saw that I have had for years. Great saw but I keep scorning the cylinder. I do replace it myself but this is the third time in the last few years that it has happened and I do not use the saw much.
recently the saw had been sitting for about 1 year plus. I drained the gas and put in fresh new 93 octane with 50 to 1 Husqvarna oil. It ran great for about 1/2 hour and then stalled. I did a compression test and it was low, took it apart and the cylinder was shot.

a) what am I doing wrong
b) where and what brand parts should I replace them with

Thanks in advance
 
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Old 11-16-17, 06:32 AM
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Most of the time scoring comes from the fuel/fuel air mixture. In hot weather it's a good idea to run a heavier oil to gas mixture.

In your case, assuming the parts and assembly work went OK and a new piston and barrel was used, I would say you have the fuel/air mixture set too lean for high rpms. You may want to turn the High rpm screw on the carb out until you get a slight drop in rpms.
 
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Old 11-16-17, 11:33 PM
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I agree with marbobj ^^^^^^^^^^^^^^^^^
 
  #4  
Old 11-17-17, 02:23 AM
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besides the fuel mixture adjustment you may have an air leak witch is causing it to run lean would probably at least pressure test for leaks after repair.
 
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