2008 Evinrude E-TEC 55MFE Technical Manual, Page 167Get this manual
OILING SYSTEM OIL CONTROL SETTINGS
Oil Recirculation System
External hoses and fittings, internal cylindercrankcase passages, and intake manifold passages are used to recirculate any accumulation of oil from various locations in the powerheadThe movement of oil is controlled by check valves
OIL CONTROL SETTINGS
Oil Priming
The oiling system of the outboard must be primed: When the outboard is first installed Whenever the oil supply to the oil lift pump is disconnected or disrupted Whenever an oiling system component is removed or replacedRefer to Oil Supply Priming on p41
Cylinder Recirculation
Internal powerhead oil drain passages connect the intake port areas of the cylinders to circulate residual oil in the blockExternal fittings and in-line check valves on each side of the cylinder block control the movement of oil from the lower cylinder port to the upper cylinder port