1989 Johnson Evinrude "CE" 9.9 thru 30 Service Manual, P/N 507754, Page 28Get this manual
Severe Service The fueloil ratio for recreational models is 50:1 (2 oil) when used in commercial, rental, or extended severe service r:=J
Models equipped with the optional AccuMix system will require 100: (1 oil) fueloil mixture in the fuel tank in addition to the lubrication supplied by the AccuMix system when used in high performance or severe service applications
FuelOil Mixing Instructions To be used if engine's AccuMix automatic oiling system is not desiredGasoline 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 tanks Always mix in well ventilated area
LJ into tank and add required lubricant Replace filler cap
securelyThoroughly mix by shaking tankAdd balance of gasoline
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Portable tankPour approximately gallon (4 litres) gasoline