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I have a late 1960's Ted Williams air-cooled 7.5 hp outboard produced by Eska with the manual. The manual states 24:1. Hope it helps.
found it 50 to one
What is proper oil to gas ratio for a 1998 50hp Evenrude outboard
A 175hp Mercury outboard requires a 50:1 fuel to oil ratio.
50:1 ratio
50;1
2%
What is the oil to gas ratio for a 15 hp force outboard moter
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16 to 1, or 1/2 pint per gallon
50:1