1992 Johnson Evinrude "EN" 9.9 thru 30 Service Manual, P/N 508142, Page 33Get this manual
Break-In Procedure Standard Fuel TankUse 25: fueloil mixture for the first 12 gallons of fuelOptional AccuMixTankUse 50: fueloil mixture in addition to the AccuMix system for the first 12 gallons of fuelTo help ensure long engine life and prevent serious engine damage, using additional oil in the fuel is mandatory during the first few hours of operation of: new engine used engine with new powerhead used engine with newly rebuilt powerhead
!Note! DO NOT operate motor out of waterWater pump can be damaged or engine can overheat!Notel DO NOT operate engine at constant throttle settingChange engine RPM oftenFirst 20 Minutes Operate engine in gear at fast idle ONLYDO NOT exceed 1500 RPM Verify water pump operation by looking for steady stream of water at the water pump indicatorNext 40 Minutes _
DO NOT operate engine above
throttle (no more than 3500 RPM)