Maintenance
79
EMU47591
Inspecting spark plug
The spark plug is an important engine com-
ponent. The spark plug must be checked ev-
ery 100 hours. For details, consult your
Yamaha dealer.
EMU41872
Inspecting engine idle speed
ECM01691
This procedure must be performed while
the outboard motor is in the water.
Inspect the engine idle speed using the meter
that is equipped on the boat. Results may
vary depending on whether testing is con-
ducted with the outboard motor in the water.
(1) Start the engine and allow it to warm up
fully in neutral until it is running smoothly.
(2) Inspect the engine idle speed. If the en-
gine idle speed is out of specification,
consult a Yamaha dealer or other quali-
fied mechanic.
EMU47601
Changing engine oil
The engine oil must be changed every 100
hours. For details, consult your Yamaha deal-
er.
EMU48060
Why Yamalube
YAMALUBE oil is a Genuine YAMAHA Part
born of the engineers’ passion and belief that
engine oil is an important liquid engine com-
ponent. We form teams of specialists in the
fields of mechanical engineering, chemistry,
electronics and track testing, and have them
develop the engine together with the oil it will
use. Yamalube oils take full advantage of the
base oil’s qualities and blend in the ideal ba-
lance of additives to make sure the final oil
clears our performance standards. Thus,
Yamalube mineral, semisynthetic and syn-
thetic oils have their own distinct characters
and value. Yamaha’s experience gained over
many years of research and development
into oil since the 1960’s helps make
Yamalube the best choice for your Yamaha
engine.
EMU29116
Inspecting wiring and connectors
Inspect that each connector is engaged se-
curely.
Inspect that each ground lead is properly
secured.
Standard spark plug:
ILMAR7H-9
Idle speed (in neutral):
650–750 r/min
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Engine oil quantity (without oil filter
replacement):
7.5 L (7.93 US qt, 6.60 Imp.qt)
Engine oil quantity (with oil filter re-
placement):
7.8 L (8.24 US qt, 6.86 Imp.qt)
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