Oil Pressure Switch Test - Mercury 25 EFI Service Manual

Ignition
5. Cover the oil pressure switch with the protection boot.
6. Install the VST onto the lower mounting grommet.
7. Secure the VST to the cylinder block with two washers and bolts. Tighten the VST mounting bolts to the specified torque.
a
c
Description
Bolt securing VST

Oil Pressure Switch Test

18 1
5
34 17
1. Connect the red lead of an ohm meter to the terminal and the black lead to the oil pressure switch metal body.
2. Using a controllable air pressure source, apply air pressure to the oil pressure switch. Check for continuity specification.
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b
11584
a
© 2016 Mercury Marine
a - Fuel hose
b - High pressure fuel pump wire harness connector
c - Bolt securing the VST (2)
BRN/WHT
b
11589
Nm lb. in.
6 53
a - ECM engine harness
connector
b - Oil pressure switch
22589
90-8M0105568 eng MARCH 2016
lb. ft.