Motor Repair - Mercury 150 EFI Service Manual

POWER TRIM
CHECKING AND CLEANING COMMUTATOR
1. If commutator is worn it may be turned on an armature conditioner or a lathe.
2. Clean commutator with "OO" sandpaper.
a -
FIELD TESTS
IMPORTANT: Commutator end of armature must be installed in brushes when per-
forming the following tests.
BLUE and BLACK Motor Wires
BLACK Motor Wire, and Frame
BLUE Motor Wire and Fram
*If specified readings are not obtained, check for:
defective armature
dirty or worn brushes
dirty or worn commutator
If defective components are found, repair or replace component(s) and retest.

Motor Repair

REMOVAL
NOTE: Power Trim System does not have to be removed from outboard to repair/replace
motor.
DISASSEMBLY
Refer to "Motor Disassembly" on page 5B-38 to disassemble motor from pump.
Page 5B-40
Commutator
Ohmmeter
Leads Between
(Motor Housing)
e
a
a
53775
Resistance
(Ohms)
0
No Continuity
No Continuity
Scale Reading*
(x____________)
(Rx1)
(Rx1)
(Rx1)
90-883728 JULY 2001