Author Topic: Fuel type and tuning differences.  (Read 231 times)

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Offline KilliansRedLeo

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Re: Fuel type and tuning differences.
« Reply #20 on: April 16, 2014, 09:49:07 pm »
It was running right on e-10 and 50:1. I decided to run a test with four different types of alternative fuels, from tru-fuel, Stihl, Husqvarna and non-e pump gas. When I began the tests, the brand of fuel made huge differences in the tuning of the saw.
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Offline 660magnum

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Re: Fuel type and tuning differences.
« Reply #21 on: April 16, 2014, 09:58:32 pm »
Oils effect saw tuning also.

Some synthetics do not contribute to combustion and to go from Pennzoil air cooled at 32:1 to say like Red Line at 32:1, your saw will suddenly be noticeably lean.

Cut4fun and I swap saws sometimes and he uses Klotz at 32:1 and this always requires a re-tune because I run Pennzoil.
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Offline 3000 FPS

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Re: Fuel type and tuning differences.
« Reply #22 on: April 16, 2014, 11:17:09 pm »
I do not get it.   If the high speed nozzle check valve is defective would it not have the same affect on all the different types of fuels.   Just trying to understand in case I ever run into something like this myself.
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Offline KilliansRedLeo

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Re: Fuel type and tuning differences.
« Reply #23 on: April 17, 2014, 04:37:58 am »
My original intent was to try some alternative fuels, and I was getting what I consider wide differences in tuning between brands, as much as half a turn form one type to another. I was using a saw that I own, that had not been run in a few months. I don't get why it would not affect the tuning so widely either.

I thought that there would be minor differences but nothing like I was getting earlier. It was late in the day when I switched out the carb, so I will run the tests from the beginning again tomorrow!

I have not torn the carb apart yet but my bet is that the check valve IS or went bad while I was messing with the saw. I just put on a new carb and set it at 1&1, started right up and would idle. Will set the H side in the AM and put it in wood. Still concerned about plug color but we will see.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
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