Maintenance

●Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running.

ECM00490

NOTICE

This procedure must be performed while the outboard motor is in the water. A flushing attachment or test tank can be used.

If the boat is not equipped with a tachometer for the outboard motor, use a diagnostic tachometer 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 smoothly.

2.Once the engine has warmed up, verify whether the idle speed is set to specifica- tion. For idle speed specifications, see page 12. If you have difficulty verifying the idle speed, or the idle speed requires adjustment, consult a Yamaha dealer or

other qualified mechanic.

EMU29113

Checking wiring and connectors

●Check that each connector is engaged se- curely.

●Check that each ground lead is properly se- cured.

ZMU02087

EMU32112

Checking propeller

EWM01881

WARNING

You could be seriously injured if the engine accidentally starts when you are near the propeller. Before inspecting, remov- ing, or installing 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 shutoff 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-cavitation plate and the propeller to prevent the propeller from turning.

ZMU01897

Checkpoints

●Check each of the propeller blades for ero- sion from cavitation or ventilation, or other damage.

●Check the propeller shaft for damage.

●Check the splines for wear or damage.

●Check for fish line tangled around the pro- peller shaft.

49