Mercury 40 Service Manual page 106

BRUSH HOLDER
10. Inspect brushes for wear. Replace brush holder if not within specifications.
a -
11. Ohm test the brush holder. The positive (+) brushes should not show continuity to brush
holder. Replace brush holder assembly if ohm test shows continuity.
a -
b -
ARMATURE INSPECTION/TESTING
12. Inspect the commutator surface of the armature for burnt marks and dirt in commutator
grooves.
13. Using a piece of #600 grit wet-or-dry sand paper, clean the surface of the commutator.
a -
b -
90-828631R3 MARCH 1999
Wear Limit - 0.47 (12.0 mm)
a
Positive (+) Brushes
Brush Holder Assembly
b
Commutator
Sand Paper (#600 Grit)
CHARGING AND STARTING SYSTEM
a
a
b
a
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