1976 Evinrude 40HP outboards Service Repair Manual P/N 406447, Page 13Get this manual
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ENGINE FUEL AND LUBRICANT RECOMMENDED GASOLINE: Use gasoline with the foHowing iiu octane us
FUEL MIXTURE: part Lubricant to 50 parts Gasoline OR: (6 Galnk) pint lubricant to gallons (5 I