2012 2013 2014 Evinrude E-TEC 40 50 60 75 90 HP Outboard Repair Service Manual, Page 35Get this manual
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ROUTINE SERVICE COOLING SYSTEM
FlushingOutboard Not Running
Outboard in TILTED (UP) position VERTICALDOWN)
water inlet pressure between 20 to 40 (140 to 275 kPa)