Yamaha F50F Service Manual page 282

TRBL
SHTG
Ignition system
Check the condition of the spark
plugs.
Good condition?
Yes
Check the ignition spark using
the ignition tester.
Good spark?
No
Check the engine stop lanyard
switch for continuity.
Is there continuity?
Yes
Check the resistance of each
ignition coil.
Continued on next page.
9-9
Troubleshooting
No
Clean, adjust, or replace the
spark plugs.
WARNING
• Do not touch any of the connections of the ignition tester leads.
• Do not let sparks leak out of the removed spark plug caps.
• Keep flammable gas and liquids away, since this test can produce
sparks.
Check the pulser coil output
Yes
peak voltage, resistance, or
pulser coil air gap.
Check the fuel system and com-
pression pressure.
No
Replace the engine stop lan-
yard switch.
Good condition?
Yes
No Adjust or replace
the pulser coil.
6C13G11