TRBL
SHTG
Troubleshooting
9-1
6D55F11
NOTE:
• Before troubleshooting the outboard motor, check the compression pressure, valve clearance, the
mounting and rigging of the outboard motor, and the operation of the manual starter. Also, make
sure that specified fuel has been used.
• Check that all electrical connections are tight and free from corrosion.
• To diagnose a mechanical malfunction, use the troubleshooting charts for each trouble located in
this chapter. Also, when checking and maintaining the outboard motor, see Chapters 3–8 for safe
maintenance procedures.
Power unit
9
Symptom 1: Engine does not start, or starting the engine is difficult.
• Manual starter is operating normally.
• Air vent screw on the fuel tank is open.
Ignition system
Check the condition of the spark
plugs.
Clean, adjust, or replace the
spark plugs.
No
Check the ignition spark using
the spark gap tester.
WARNING
• Do not touch any of the connections of the spark gap 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.
Continued on next page.
Good condition?
Yes
Replace the engine stop lan-
yard switch.
Yes
Is there continuity?
No
Check the engine stop lanyard
switch for continuity (with clip
installed).
Summary of Contents for F2.5C
Page 1: ...F25C SERVICE MANUAL 6D5 28197 5F 11 290539 ...
Page 4: ......
Page 16: ...GEN INFO General information 1 11 6D55F11 MEMO ...
Page 27: ...6D55F11 2 10 1 2 3 4 5 6 7 8 9 Clamp bracket Maintenance specification ...
Page 112: ...POWR Power unit 5 51 6D55F11 MEMO ...
Page 136: ...LOWR Lower unit 6 23 6D55F11 Shimming 6 S6D56370 T3 A3 B3 42 5 T1 T2 24 0 24 0 B2 A1 A2 B1 ...
Page 173: ...6D55F11 TRBL SHTG 1 2 3 4 5 6 7 8 9 Troubleshooting Power unit 9 1 ...
Page 183: ......
Page 184: ...YAMAHA MOTOR CO LTD Printed in Japan Nov 2003 0 4 1 CR E Printed on recycled paper ...