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Looking for recommended gas to oil ratio for 5 1/2 hp to 10hp
24:1
http://www.richardsoutboardtools.com classicomctools@gmail.com
Different ratios for the 5.5 and 10 horse motors but it won’t hurt anything running the ten on 16:1 instead of the recommended 24:1.
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You can find anything you want to find in "official" charts. But the 5.5 came with a 4 gallon tank with a decal on the side saying use one quart of oil per tankful. That’s 16:1.