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2009 mercury 20hp 4 stroke not running right
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<blockquote data-quote="Pappy" data-source="post: 498377" data-attributes="member: 3278"><p><strong>I use ethanol free fuel in my engines to try and avoid long term corrosion but if you are going through fuel fairly quickly any level of fresh fuel will be fine to use. I never use over 89 octane. Higher octane fuels are extremely fast burning. Designed for today's automotive engines that can readily take advantage of it. Production outboards and more specifically older outboards cannot make use of it and may actually produce less horsepower or lose running quality. Modifications would have to be made in order to make proper use of it. </strong></p></blockquote><p></p>
[QUOTE="Pappy, post: 498377, member: 3278"] [B]I use ethanol free fuel in my engines to try and avoid long term corrosion but if you are going through fuel fairly quickly any level of fresh fuel will be fine to use. I never use over 89 octane. Higher octane fuels are extremely fast burning. Designed for today's automotive engines that can readily take advantage of it. Production outboards and more specifically older outboards cannot make use of it and may actually produce less horsepower or lose running quality. Modifications would have to be made in order to make proper use of it. [/B] [/QUOTE]
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2009 mercury 20hp 4 stroke not running right
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