Author Topic: Ethanol  (Read 239 times)

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Offline Philbert

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Re: Ethanol Separation
« on: March 27, 2015, 11:33:33 pm »
I tried to get some straight info from a couple of gasoline companies several years ago.  My take aways were: 1) gasoline is blended to meet automobile specifications, not small engines; and, 2) there are a lot of different additives in most gasoline, to meet those specifications, or emissions requirements.

Their comments suggested that some of these additives may change over time, even if the gasoline itself did not.  Might be part of the reason why 'old gas' was not as big of a deal in the 1960's.

The other was the change in the carbs.  My Toro snow thrower with the 2-cycle Tecumseh engine would start on the first or second pull after sitting  for 7 or 8 months, with just a little Stabil in the mix.  But it did not even have an air filter on the carb!  Modern saw carbs are much more fussy.

So, even if you did not get visible separation, there could still be stuff that might gunk up a carb.  I have had some friend's saws that would not start.  After they admitted that the fuel was 4 months old, we dumped it out, put in fresh, pulled 10+/- times to clear the lines, and vrooom.



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