Lubrication; Flushing Power Unit - Yamaha F40H Owner's Manual

Maintenance
EMU41072

Lubrication

(1) Change the gear oil. For instructions,
see page 83. Check the gear oil for the
presence of water that indicates a leaky
seal. Seal replacement should be per-
formed by an authorized Yamaha dealer
prior to use.
(2) Lubricate all grease fittings. For further
details, see page 76.
TIP:
For long-term storage, fogging the engine
with fogging oil is recommended. Contact
your Yamaha dealer for information about
fogging oil and procedures for your outboard
motor.
EMU28446

Flushing power unit

Perform this procedure right after operation
for the most thorough flushing.
ECM01531
Do not perform this procedure while the
engine is running. The water pump may
be damaged and severe damage from
overheating can result.
(1) After shutting off the engine, unscrew
the garden hose connector from the fit-
ting on the bottom cowling.
69
2
1. Fitting
2. Garden hose adapter
3. Garden hose connector
(2) Screw the garden hose adapter onto a
garden hose, which is connected to a
fresh water supply, and then connect it
to the garden hose connector.
(3) With the engine off, turn on the water tap
and let the water flush through the cool-
ing passages for about 15 minutes. Turn
off the water and disconnect the garden
hose adapter from the garden hose con-
nector.
(4) Reinstall the garden hose connector
onto the fitting on the bottom cowling.
Tighten the
NOTICE: Do not leave the garden
hose connector loose on the bottom
cowling fitting or let the hose hang
free during normal operation. Water
1
3
ZMU07087
connector securely.