Yamaha F50D Servise Manual - page 107
5-18
0
1
2
3
4
5
6
7
8
9
10
A
3.
Connect the Yellow/Red (Y/R) lead to the
positive penlight battery terminal (1.5 V)
and connect the Pink/White (P/W) lead to
the negative terminal, and then check
that the oil pressure alert indicator
comes on. Replace the alert indicator if it
does not come on.
Checking the Prime Start
1.
Disconnect the Prime Start connectors
a
.
2.
Turn the engine start switch to “START”,
and then measure the input voltage at
the Prime Start connectors
a
(wiring
harness end). Check the wiring harness
and Rectifier Regulator if below specifi-
cation.
TIP:
To prevent the engine from starting when
cranking it, make sure to disconnect all spark
plug caps.
3.
Turn the engine off.
Checking the engine start switch
1.
Disconnect the 10-pin main wiring har-
ness coupler.
2.
Measure the input voltage at the 10-pin
main wiring harness coupler (outboard
motor end). Check the fuse and wiring
harness if below specification.
LED1
+
-
P/B
Y/B
Y/B
P/B
LED2
+
-
P/W
Y/R
P/W
Y/R
Prime Start input voltage (reference data):
Blue (L)–Black (B)
11.0 V
L
B
L
B
L
B
L
B
a
a
Ignition unit and components