1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 25Get this manual
Break-In Procedure To help ensure long engine life and prevent serious engine damage, use OMC SysteMatched Four Stroke Outboard Break-in Lubricant during the first 20 hours of engine operation for: new engine used engine with new powerhead used engine with newly rebuilt powerhead, cylinder walls honed, and new piston rings installed 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 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 112 throttle DO NOT hold constant throttle settingChange engine speed every 15 minutesINotel With easy planing boats, use full throttle to quickly accelerate boat onto planeImmediately reduce throttle to one-half as soon as boat is on planeBE SURE boat remains on plane at this throttle settingNext Nine Hours Bring boat onto plane and operate engine below 3f4 throttleDO NOT exceed 4500 RPM Every 30 minutes, operate engine at full throttle for approximately one minute DO NOT exceed recommended maximum engine RPMRefer to Specifications, this Section Check the crankcase oil level often Note Retorque cylinder head screws after engine break-in period Retorque after engine has been run and cylinder heads have cooled to the touch