Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 214Get this manual
OIL INJECTION
Purging Air From the Engine Oil Reservoir and Remote Oil Hose
NOTE: Before starting engine, make sure the oil pump has been primed1Start the engineRun the engine until all the air has been vented out of the reservoir and oil starts to flow out of the reservoirRe-tighten fill cap
aFill Cap
Oil Warning Systems
LOW OIL LEVEL