Yamaha F9.9C, Ower'S Manual, Page: 83 / 117

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EMU09912
INSPECTING IDLING SPEED
w
8
Do not touch or remove electrical
parts when starting or during opera-
tion.
8
Keep hands, hair and clothes away
from flywheel and other rotating parts
while engine is running.
c C
This procedure must be performed while
the outboard motor is in the water. A
flushing attachment or test tank can also
be used.
A diagnostic tachometer should be used for
this procedure. Results may vary depending
on whether testing is conducted with the
flushing attachment, in a test tank, or with
the outboard motor in the water.
1)
Start the engine and allow it to warm up
fully in neutral until it is running smooth-
ly. If the outboard motor is mounted on
a boat, be sure the boat is tightly
moored.
2) Verify whether the idle speed is set to
specification. For idle speed specifica-
tions, see “Specifications” in this chap-
ter.
NOTE:
Correct idling speed inspection is only pos-
sible if the engine is fully warmed up. If not
warmed up fully, the idle speed will mea-
sure higher than normal. If you have difficul-
ty verifying the idle speed, or the idle speed
requires adjustment, consult a Yamaha
dealer or other qualified mechanic.
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