1995 Johnson/Evinrude Outboards 40 thru 55 2-Cylinder Service Manual, Page 33Get this manual
Break-In Procedure During the first 12 gallons of fuel you must use 50: fueloil ratio in your fuel tank in addition to the operation of the VRO$ Oil Injection System or AccuMixAfter the 12 gallons offuel, check to see that the oil level in the VRO$ tank has changed, indicating that oil has been used before using unmixed gasoline in the fuel systemIf the VRO$ system is disconnected or the engine is not equipped with VRO$ or AccuMix system, you must use 25: fueloil ratio in the fuel tank 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
INotel DO NOT operate motor out of waterWater pump can be damaged or engine can overheatINotel DO NOT operate engine at constant throttle settingChange engine RPM oftenFirst 10 Minutes Operate engine in gear at fast idle ONLY Verify water pump operation by looking for steady stream of water at the water pump indicatorNext 50 Minutes DO NOT operate engine above half throttle (no more than 3500 RPM) DO NOT hold constant throttle settingChange engine speed every 15 minutes