Yamaha E40J - Charging System; Checking the Brushes; Checking the Rectifier (WH, W); Checking the Starter Motor Operation

6F65G11
8-16
9
8
7
6
5
4
3
2
1
Starter motor/Charging system
4. Check the armature for continuity.
Replace if out of specifications.
Checking the brushes
1. Measure the brush length a. Replace
the brush assembly if below specifica-
tion.
2. Check the brush holder assembly for
continuity. Replace if out of specifica-
tions.
Checking the starter motor operation
1. Check the operation of the starter motor
after installing it onto the power unit.
Charging system
Checking the rectifier (WH, W)
1. Measure the rectifier output peak volt-
age. If below specification, measure the
lighting coil output peak voltage. Replace
the rectifier if the output peak voltage of
the lighting coil is above specification.
NOTE:
After starting the engine, disconnect the out-
put lead (red lead) 1 of the rectifier when
measuring the output peak voltage.
a
6F680200
Brush length limit a:
9.0 mm (0.35 in)
6F680190
cd e
6F680210
2
1
R
R
R
B
1
6F680220
Armature continuity
Commutator segments c Continuity
Segment – Armature core d No continuity
Segment – Armature shaft e No continuity
Brush continuity:
Brush holder 1 —
No continuity
Brush base 2