1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 21Get this manual
High Performance Any engine, when used for high performance, requires 50: fueloil mixture in the fuel tank along with the systemIf the system is not used, 25: fueloil mixture is required in the fuel tankSevere Service When equipped engine is used in commercial, rentalor extended severe service, no additional oiling is necessaryFuelOil Mixing Instructions NoteTo be used if engine's
automatic oiling system is not
desired&
Gasoline is extremely flammable and highly explosive under certain conditionsAlways stop engine and do not smoke or allow open flames or spark near the boat when refueling or changing fuel tanksAlways mix in well ventilated areaPortable tankAbove and below 32 (00 e), add one gallon (4 litres) of fuelPour in required amount of oilAdd remaining fuelInstall filler cap and tip tank gently to distribute oil
Permanently Installed TankAbove 32 (00 e), pour oil slowly with the fuel as tank is filledBelow 32 (0 e), add one gallon (4 litres) of fuel to separate containerPour in required amount of oilInstall filler cap and tip container gently to distribute oilSlowly pour oil fuel mixture into tank with fuel as tank is filledTo prevent static spark, use large metal filter funnel as shown in figureThe fuel nozzle must contact the metal funnel when filling the tank