Yamaha F50D Servise Manual - page 103
5-14
0
1
2
3
4
5
6
7
8
9
10
A
TIP:
9
To prevent the engine from starting when
cranking it, make sure to disconnect all
spark plug caps.
9
Do not remove the clip from the engine
shut-off switch.
9
If measuring the output peak voltage under
the unloaded conditions, disconnect the
coupler
b
.
3.
Disconnect the test harness
1
.
4.
Measure the pulser coil resistance.
Replace the pulser coil if out of specifica-
tion.
5.
Connect the pulser coil coupler
a
.
Checking the charge coil
1.
Disconnect the charge coil coupler
a
,
and then connect the test harness
1
.
2.
Measure the charge coil output peak
voltage. Replace the stator assembly if
below specification.
TIP:
9
To prevent the engine from starting when
cranking it, make sure to disconnect all
spark plug caps.
9
Do not remove the clip from the engine
shut-off switch.
9
If measuring the output peak voltage under
the unloaded conditions, disconnect the
coupler
b
.
3.
Disconnect the test harness
1
.
Pulser coil output peak voltage
(reference data):
White/Red (W/R)–Black (B)
r/min
Unloaded
Loaded
Cranking
1500
3500
DC V
6.3
3.5
7.4
11.2
Pulser coil resistance (reference data):
White/Red (W/R)–Black (B)
396.0–594.0
Ω
at 20 °C (68 °F)
W/R
B
W/R
W/B
G G/W
G/W
G
B
W/R
a
1
a
b
a
1
Test harness (2 pins)
1
: 90890-06867
Charge coil output peak voltage
(reference data):
Brown (Br)–Blue (L)
r/min
Unloaded
Loaded
Cranking
1500
3500
DC V
140
140
170
130
L
Br
G/W G
L
Br
1
a
G
G/W
a
1
b
L
Br
Ignition unit and components