Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 195Get this manual
1998 Model Oil Flow Schematic b
c56028Oil Hose to Air CompressorExcess Oil Return from Air Compressor to Intake ManifoldPORT Side Bleed System Oil Supply Return Line to Intake ManifoldCheck ValveAir CompressorOil ReservoirOil Input Hose to Oil PumpOil Passageway (6 each) i-Intake Manifold