Trbl Shtg; Troubleshooting; Power Unit; Ignition System - Yamaha F15B Service Manual

TRBL TRBL
SHTG SHTG
NOTE:
9 To diagnose a mechanical malfunction, use the troubleshooting charts pertaining to the trouble
located in this chapter. Also, when checking and maintaining the outboard motor, see Chapters
4–8 for safe maintenance procedures.
9 Check that all electrical connections are tight and free from corrosion.

Power unit

Symptom: Manual starter turns but engine will not start.
9 Check the ignition system, fuel system, and the compression pressure as listed below.
9 Be sure the air vent screw on the fuel tank is open.
9 Be sure insert the clip into the engine stop lanyard switch.

Ignition system

Check the engine stop lanyard
switch for continuity.
Is there correct?
Yes
Check the condition of the spark
plugs.
Are they in
good condition?
Yes
Check the ignition spark using
the spark gap tester.
Is a good spark
being produced?
Yes
(continued on following page)
9-1

Troubleshooting

No
Replace the engine stop lanyard
switch.
No
Clean and replace as required.
No
Check the spark plug wires or caps
for deterioration and damage.
Measure the ignition coil
resistance.
Is there any
Yes
deterioration or
damage?
No
Is resistance
No
within
specification?
Yes
w
9 Do not touch any of the con-
nections of the spark gap
tester leads.
9 Do not let sparks leak out of
the removed spark plug
caps.
9 Keep flammable gas or liq-
uids away, since this test
can produce sparks.
Replace the ignition coil or caps
as necessary.
Replace the ignition coil.
6D45F11