Motor And Electrical Tests/Repair; Trim Pump Motor Test; Thermal Overload Switch Test; Motor Assembled - Mercury 45 Jet 50-55 Service Manual

Motor and Electrical Tests/
Repair

Trim Pump Motor Test

WARNING
Do not perform this test near flammables (or ex-
plosives), as a spark may occur when making
connections.
1. Disconnect orange (motor) wire and black (mo-
tor) wire from relay switch wiring harness.
2. Connect a 12 volt power supply to motor wires
(positive to orange; negative to black results in
motor up direction. Positive to black; negative to
orange results in motor down direction). Motor
should run.
3. If motor does not run, disassemble motor and
check components.

Thermal Overload Switch Test

IMPORTANT: If thermal overload switch has been
activated, pump motor cannot be tested for a
minimum of one minute. After this period switch
should close (reset itself) and pump motor may
be operated. Perform the following check(s) only
if switch does not reset itself.

MOTOR ASSEMBLED

Connect Ohmmeter (R x 1 scale) leads as shown. If
switch is good, full continuity (zero ohms) will be indi-
cated. If full continuity is not indicated, disassemble
motor and recheck switch per instructions, following.
90-817643R1 DECEMBER 1996
a
a - Motor Wire (Black)
b - Motor Wire (Orange)

MOTOR DISASSEMBLED

Connect Ohmmeter (R x 1 scale) leads as shown. If
switch is good, full continuity (zero ohms) will be indi-
cated.
If full continuity is not indicated, clean switch contact
surfaces, using an ignition point file.
Recheck switch; if full continuity is not indicated, re-
place end frame.
b
51196
51193
MID-SECTION - 5C-29