Author Topic: E15 ANOTHER FUEL FIGHT  (Read 335 times)

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Offline 660magnum

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Re: E15 ANOTHER FUEL FIGHT
« Reply #30 on: August 14, 2014, 09:52:42 am »
Great thanks. If I was to use airplane fuel because of the higher octane should I richen the fuel oil mix?

Rather than give you a direct answer, I'll try to give you pointers to better chainsaw running no matter what changed.

I prefer to adjust the chainsaw close to the two cycle / four cycle change over point. This has always been the mixture point of choice.

You will find that this point moves around with the heat built up in the chainsaw. What I notice is a chainsaw mixture going leaner in a big buried cut before the bar is through the wood. So I prefer to adjust the mixture to the weather and the job.

A chainsaw adjusted correctly for whacking limbs will get too lean in a big long cut in a tree trunk.

Likewise a chainsaw set correctly for heavy duty cutting will be too "fat" when starting the saw and cutting off one small limb.

A chainsaw adjusted correctly for the job and temperature in very hot weather will be too lean in extremely cold weather.

Likewise a chainsaw adjusted correctly for very cold weather will be too rich for very hot weather.

Moral .  . .

Learn to identify the change over point of the 2 cycle - 4 cycle  running of the chainsaw and keep your mixture adjusted for the chainsaw to run at that point in the job being performed.
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That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline newowner?

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Re: E15 ANOTHER FUEL FIGHT
« Reply #31 on: August 14, 2014, 11:18:09 am »
Thank you . Overwhelming but informative . How do I identify when its running lean ans rich ?  And how do I adjust?

Offline 660magnum

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Re: E15 ANOTHER FUEL FIGHT
« Reply #32 on: August 14, 2014, 01:42:22 pm »
Oh my?
Listen for the roughness-smoothness transition while leaning out from a too rich condition

https://www.youtube.com/watch?v=7jYUotkZorg
https://www.youtube.com/watch?v=29FiGmDQkaM
https://www.youtube.com/watch?v=WIdj-ZpygLw
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline Eccentric

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Re: E15 ANOTHER FUEL FIGHT
« Reply #33 on: August 14, 2014, 10:29:38 pm »
Great posts.  I agree completely.  When I read his Q I was thinking that I didn't have time to give a thorough answer.  You covered it.8)
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline newowner?

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Re: E15 ANOTHER FUEL FIGHT
« Reply #34 on: August 14, 2014, 10:54:36 pm »
Awesome thanks guys  this  info  really helped!   Sorry  I'm  a noob with carbs  lol 🍺

Offline Eccentric

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Re: E15 ANOTHER FUEL FIGHT
« Reply #35 on: August 14, 2014, 11:41:38 pm »
This reminded me to cut/paste my 'old saw tuning instructions' Sig line into my profile here.  Been meaning to do so for a while...
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline 660magnum

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Re: E15 ANOTHER FUEL FIGHT
« Reply #36 on: August 15, 2014, 07:58:20 am »
+1 on the sig line
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

 

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