1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 53Get this manual
Fuel Requirements
Minimum Octane Models 9.915 Recommendation See fuel classifications below(R+M)2 "AKI"
PCE0020
Preferred Fuel: Models with emissions portUse regular unleaded or premium unleaded automotive gasoline that has not been extended with alcoholModels without emissions portUse regular unleaded, regular leaded automotive gasoline that has not been extended with alcoholAcceptable Fuel: Any of the above gasolines with up to the following percentage by volume: 10 ETHANOL or METHANOL with cosolvents Notel 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 ratingQVIC products have been designed to operate using the Preferred Fuel or Acceptable Fuel; however, be