Yamaha F50F Service Manual page 283

Good condition?
Yes
Check the resistance of each
spark plug wire and check the
spark plug caps for salt buildup.
Good condition?
Yes
Check the main and fuel pump
relay (main control) for continu-
ity.
Is there continuity?
Yes
Check the ECM output peak
voltage.
6C13G11
No
Replace the ignition coils.
No
Repair or replace the spark plug
wire.
No
Replace the main and fuel
pump relay.
Power unit
1
2
3
4
5
6
7
8
9
9-10