Inspecting Spark Plug; Inspecting Engine Idle Speed; Changing Engine Oil; Why Yamalube - Yamaha F400A Owner's Manual

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.
Standard spark plug:
ILMAR7H-9
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.
Idle speed (in neutral):
650–750 r/min
EMU47601

Changing engine oil

The engine oil must be changed every 100
hours. For details, consult your Yamaha deal-
er.
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)
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.
Maintenance
79