1977 Evinrude 4HP Outboards Service Manual, PN 5303, Page 11Get this manual
ENGINE FUEL AND LUBRICANT RECOMMENDED GASOLINE: Use gasoline with the following minimum octane numbersPUMP POSTED OCTANE NUMBER Research Octane Number Most Commonly Used in the Past
Built-in TankIn separate container mix all lubricant needed with one gallon or more of gaSOlineUse large metal filter funnelPour this mixture slowly with fuel as tank is filled
SAFETY WARNING