Checking Water In Engine Oil Tank; Checking Wiring And Connectors; Checking Propeller - Yamaha 40V Owner's Manual

Maintenance
flushing attachment or test tank can 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.
TIP:
Correct idling speed inspection is only possi-
ble if the engine is fully warmed up. If not
warmed up fully, the idle speed will measure
higher than normal. If you have difficulty ver-
ifying the idle speed, or the idle speed re-
quires adjustment, consult a Yamaha dealer
or other qualified mechanic.
2. Verify whether the idle speed is set to
specification. For idle speed specifica-
tions, see page 9.
EMU29061

Checking water in engine oil tank

A translucent water drain hose is connected
from the bottom of the oil tank to the filler
neck. If water or foreign matter collects in this
hose, consult a Yamaha dealer.
1
1. Drain hose
2. Filler neck side
74
2
ZMU03416
1
1. Drain hose
2. Filler neck side
EMU29112

Checking wiring and connectors

Check that each grounding wire is properly
●
secured.
Check that each connector is engaged se-
●
curely.
EMU32111

Checking propeller

EWM01880
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, 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.
2
ZMU04989
ZMU03240
"