1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 154Get this manual
4Remove the connecting rod capMeasure the compressed plastigauge to check the connecting rod oil clearanceReplace bearings if oil clearance is not in specification Temperature Switch
1Check continuity of switch
Temperature Switch Continuity Check
Below 1700 (77 C) Above 170 (77 C)
No Continuity Continuity
Oil Pressure Switch
1Check continuity of switch
Connecting Rod Oil Clearance
0.00080.0020 in(0.0200.52 mm)