Checking The Brushes; Checking The Magnet Switch; Checking The Starter Motor Operation - Yamaha F50F Service Manual

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ELEC
4. Check the armature
Replace if out of specifications.
Armature continuity
Commutator segments b
Segment – Armature core c No continuity
Segment – Armature shaft d No continuity

Checking the brushes

1. Measure the brush length. Replace the
brush assembly if below specification.
Brush length wear limit a:
9.5 mm (0.37 in)
2. Check the brush holder assembly for
continuity. Replace if out of specification.
2
8-19
Electrical systems
for continuity.
Continuity
1
S69J8440
Brush continuity
Brush 1 – Brush 2

Checking the magnet switch

1. Connect the tester leads between the
magnet switch terminals as shown.
2. Connect the positive battery lead to the
brown (Br) lead.
3. Connect the negative battery lead to the
starter motor body.
CAUTION:
Do not connect the battery for more than
one second, otherwise the magnet switch
can be damaged.
4. Check that there is continuity between
the magnet switch terminals. Replace if
there is no continuity.
5. Check that there is no continuity after the
negative battery terminal is removed.
Replace if there is continuity.
NOTE:
The starter motor pinion should be pushed
out while the magnet switch is on.

Checking the starter motor operation

1. Check the operation of the starter motor
after installing it onto the power unit.
No continuity
Br
S6D88130
6C13G11