Yamaha WaveRunner VXR VX1800A, Service Manual

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Starter motor
Starter motor operation
1. Remove the starter motor. See “Wire har-
ness” (5-18).
2. Hold the starter motor in a vise using alu-
minum plates on both sides.
3. Connect the positive battery lead “1” to the
starter motor terminal bolt “a”.
4. Connect the negative battery lead “2” to
the starter motor body “b”, and then check
the starter motor operation.
Do not touch the drive gear.
TIP:
• Check the starter motor operation for a few
seconds.
• If the starter motor is disassembled, make
sure to check the operation again after as-
sembling it.
5. Disconnect the negative battery lead, and
then the positive battery lead from the bat-
tery terminals.
6. Install the starter motor. See “Wire har-
ness” (5-18).
Armature check
1. Check the commutator. Clean using 600-
grit sandpaper and compressed air if dirty.
2. Measure the commutator diameter “a”.
Replace the armature if below specifica-
tion.
3. Measure the commutator undercut “a”.
Replace the armature if below specifica-
tion.
4. Check the armature for continuity. Re-
place if out of specification.
a
1
2
b
Commutator diameter
28.0 mm (1.10 in)
Limit
27.0 mm (1.06 in)
Commutator undercut
0.7 mm (0.03 in)
a
a