Mercury 40 Service Manual page 92

ARMATURE TEST FOR GROUND
Set ohmmeter to (R x 1 scale). Place one lead of
1.
ohmmeter on armature core (or shaft) and other
lead on commutator, as shown.
If meter indicates continuity, armature is
2.
grounded and must be replaced
CHECKING POSITIVE BRUSHES AND TERMI-
NALS
Connect ohmmeter (R x 1 scale) leads between
1.
positive brushes.
Ohmmeter must indicate full continuity (zero re-
2.
sistance). If resistance is indicated, check lead to
positive terminal solder connection. If connection
cannot be repaired, brushes must be replaced.
Refer to "BRUSH REPLACEMENT"
a
a - Positive Brushes
90-852572R1 JANUARY 1998
TESTING NEGATIVE BRUSHES FOR GROUND
Set ohmmeter to (R x 1 scale). Place one lead of
ohmmeter on the negative brush and the other lead
on the end cap (bare metal). If the meter indicates no
continuity, replace the negative brush. Repeat this
procedure on the other negative brush.
.
11675
a - Negative (-) Brushes
b - End Cap
.
11673
b
a
ELECTRICAL - 2B-17