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What is the mixing ratio for 9.8 hp mercury the year is in the 80's 100 to 1 50 to 1 30 to 1

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Dean

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50:1 is the ratio to go for.

Posted on Apr 02, 2010

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Older outboard motors usually take 50 to 1 mix ratio where as the newer ones often take 100 to 1 mix ratio.Try Google to double check.

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Most use a 1:50 ratio, I've seen them as rich as 1:40 while some later outboards use 1:100. What year is the Merc? Mercury's support page has lots of info and Also, here's a handy chart for mixing. https://www.mercurymarine.com/en/us/service-and-support

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1 Answer

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