Checking Wiring And Connectors; Checking Propeller - Yamaha 25 Owner's Manual

Maintenance
flushing attachment or test tank can be
used.
If the boat is not equipped with a tachometer
for the outboard motor, use a diagnostic ta-
chometer for this procedure. Results may
vary depending on whether testing is con-
ducted 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.
2. Once the engine has warmed up, verify
whether the idle speed is set to specifi-
cation. For idle speed specifications,
see page 13. If you have difficulty verify-
ing the idle speed, or the idle speed re-
quires adjustment, consult a Yamaha
dealer or other qualified mechanic.
EMU29113

Checking wiring and connectors

Check that each connector is engaged se-
G
curely.
Check that each ground lead is properly
G
secured.
EMU32112

Checking propeller

EWM01881
WARNING
You could be seriously injured if the en-
gine accidentally starts when you are
near the propeller. Before inspecting, re-
62
moving, or installing the propeller, place
the shift control in neutral, turn the main
switch to "
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 propeller
when loosening or tightening the propeller
nut. Put a wood block between the anti-cavi-
tation plate and the propeller to prevent the
propeller from turning.
Checkpoints
Check each of the propeller blades for ero-
G
sion from cavitation or ventilation, or other
damage.
Check the propeller shaft for damage.
G
Check the splines for wear or damage.
G
Check for fish line tangled around the pro-
G
peller shaft.
ZMU03737
Check the propeller shaft oil seal for dam-
G
" (off) and remove the key,
ZMU01897