Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 110Get this manual
13Install lift eye in flywheel at least threads14Using suitable hoist, remove powerhead from driveshaft housing and place on powerhead stand 16Remove oil line from oil pump and plug oil line to prevent leakage
a UflEye
b Flywheel
15.Disconnect overheat warning wire (black) and oil warning module wires (tan and black) from terminal block