1976 Johnson 2HP 2R76 Outboard Motor Service Manual, Page 14Get this manual
2-7 BREAK-IN
The 50:1 mixture is used during break-inUse only our 50:1 lubricant or other BIA certified TC-W or TC-2 lubricantsOPERATION (FIRST HOUR): Do not operate engine at continuous full power for the first hour of operationAfter 15 minutes of slow to half throttle operation, we recommend short burst of full throttle operation every to 10 minutesRun at full throttle for about 90 seconds, then return to half throttle or less