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Maintenance
EMU28306
Procedure
EMU44322
Flushing with the flushing attachment
EWM00323
WARNING
You could be seriously injured if the en-
gine accidentally starts when you are near
the propeller.
Before inspecting, removing, or install-
ing the propeller, remove the ignition
coils from the spark plugs. Also, place
the shift control in neutral, turn the main
switch to "
" (off) and remove the key,
and remove the clip from the engine
shut-off switch. Turn off the battery cut-
off switch if your boat has one.
Do not use your hand to hold the propel-
ler when loosening or tightening the
propeller nut. Put a wood block between
the anti-cavitation plate and the propel-
ler to prevent the propeller from turning.
Cooling system flushing is essential to pre-
vent the cooling system from clogging up
with salt, sand, or dirt. In addition, fogging/lu-
bricating of the engine is mandatory to pre-
vent excessive engine damage due to rust.
Perform the flushing and fogging at the same
time.
1.
If there is a fuel joint or a fuel valve on the
boat, disconnect the fuel line from the
joint or close the fuel valve.
72
2.
Wash the exterior of the outboard motor
using fresh water. NOTICE: Do not
spray water into the air intake.
For further information, see page 74.
3.
Remove the top cowling and propeller.
4.
Install the flushing attachment over the
cooling water inlet, and then turn on the
water supply. NOTICE: Do not run the
engine without supplying it with cool-
ZMU08126
ing water. Either the engine water
pump will be damaged or the engine
will be damaged from overheating.
Before starting the engine, be sure to
supply water to the cooling water pas-
sages. Avoid running the outboard
motor at high speed while on the
flushing attachment, otherwise over-
heating could occur.
1. Flushing attachment
TIP:
A flushing attachment is available from your
Yamaha dealer.
5.
Run the engine at a fast idle for a few
minutes in neutral while supplying fresh
water. WARNING! Do not touch or re-
move electrical parts when starting or
during operation. Keep hands, hair,
and clothes away from the flywheel
and other rotating parts while the en-
gine is running.
[ECM01841]
[ECM02001]
1
ZMU08115
[EWM00092]
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