Power Trim Removal - Mercury 25 EFI Service Manual

Power Trim
Step
Connect voltmeter red lead to each
Step 4: Open
point 5 and black lead to battery
circuits.
ground.
Check that voltage is being
supplied to control by performing
the following checks:
Step 5: Check Do not start engine.
voltage. Turn ignition switch to "RUN"
position.
Check for voltage at any instrument
using a voltmeter.

Power Trim Removal

1. Tilt the outboard to the full up position and engage the tilt stop mechanism.
2. Remove the trim cylinder rod pin retaining screw and washer.
3. Push the trim cylinder rod pin through the bore from the port side.
a
Page 5B-18
Test Procedure
a
10509
b
© 2016 Mercury Marine
No voltage measured:
• Go to Step 5.
Battery voltage measured:
• Trim switch is faulty or
• Open circuit in wires (grn/wht or blu/wht) between trim buttons and
trim pump motor.
• Check
• Trim switch.
• All trim harness connections for loose or corroded connections.
• Pinched or severed wires.
No voltage measured:
• Red wire is open between point 3 and red terminal on back of
ignition switch.
• Check for loose or corroded connections.
• Check for open in wire.
Battery voltage measured:
• There is an open circuit between point 5 and red terminal on back
of ignition switch.
a - Tilt stop engaged
a -
b -
10514
Test Result
Tilt cylinder rod pin retaining screw and
washer
Tilt cylinder rod pin
90-8M0105568 eng MARCH 2016