1997 Johnson Evinrude "EU" 9.9 thru 30 2-Cylinder Service Repair Manual, P/N 507263, Page 33Get this manual
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Break-In Procedure Standard Fuel TankUse 25: fueloil mixture for the first 12 gallons of fuelOptional AccuMix ROillnjection SystemUse 50:1 fueloil mixture in addition to the AccuMix system for the fir