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23rd January 2012, 12:09 AM
| #1 |
| Sappling Join Date: Jan 2012 Location: grays,south carolina
Posts: 6
|  chainsaw question
How do you port a muffler for a 2139 johnson red?
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23rd January 2012, 12:17 AM
| #2 |
| Sappling Join Date: Jan 2012 Location: OHIO
Posts: 6
| Re: chainsaw question
By adding a additional exit port any where on the muffler that will not melt part of the saw and then retune the carb. The size of the hole should be no bigger than 80% the size of the port on the cylinder. All of the exits combined should not be greater than the 80%.
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23rd January 2012, 06:03 AM
| #3 |
| Sappling Join Date: Jan 2012 Location: grays,south carolina
Posts: 6
| Re: chainsaw question  Thanks for the information!!! Have you work on 2139 jonesred saw,I'm trying to get a little more power
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23rd January 2012, 07:58 AM
| #4 |
| Semi-mature vigorous tree  Join Date: Sep 2011 Location: Oregon
Posts: 100
|  Re: chainsaw question
Bewarned you start out doing small saws and then you go bigger and much bigger  The saw in question depending on out style and the muffle design you can open the outlet 20% and retune the carby  |
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