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Tree Care Forums
Arborist 101
Racing/High Octane/Aviation Fuel in Chainsaws?
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<blockquote data-quote="VA-Sawyer" data-source="post: 4757215" data-attributes="member: 7005"><p>Octane rating does not make a saw run rich or lean. Adding alcohol will make it lean, the more you add, the leaner it gets. This is because alcohol doesn't flow through a given size orifice as easily as gasoline will. It is compounded by the fact that the alcohol brings some of its own oxygen needed for combustion. That leaves more oxygen for the gasoline to burn which is a leaner situation.</p></blockquote><p></p>
[QUOTE="VA-Sawyer, post: 4757215, member: 7005"] Octane rating does not make a saw run rich or lean. Adding alcohol will make it lean, the more you add, the leaner it gets. This is because alcohol doesn't flow through a given size orifice as easily as gasoline will. It is compounded by the fact that the alcohol brings some of its own oxygen needed for combustion. That leaves more oxygen for the gasoline to burn which is a leaner situation. [/QUOTE]
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