1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 22Get this manual
Fuel Requirements
Minimum Octane Models All Recommendations See fuel classifications below(R+M)2 "AKI"
Preferred Fuel: Any regular unleaded, regular leaded, or premium unleaded gasoline having the recommended octane rating, and not extended with alcoholAcceptable Fuel: Any of the above gasolines with up to the following percentage alcohol by volume: 10 ETHANOL or METHANOL with cosolvents
INotel The use of premium grade fuels is specifically encouragedMost national brand premium fuels
contain detergent and dispersant ingredients advertised to reduce intake valve and fuel injector depositsThese ingredients also remove and prevent carbon buildup on pistons and ringsThese ingredients can extend engine life while maintaining high level of performanceUnacceptable Fuel: Do not use any gasoline having more than 10 ETHANOL or more than METHANOL even if it contains cosolvents or corrosion inhibitor, regardless of octane ratingQ1C products have been designed to operate using the Preferred Fuel or Acceptable Fuel; however, be aware of the following: