Maintenance

4.Reinstall the filter element in the cup. Make sure the O-ring is in position in the cup. Firmly screw the cup onto the filter housing.

5.Attach the filter assembly to the bracket so that the fuel hoses are attached to the filter assembly.

6.Run the engine and check the filter and

lines for leaks.

EMU29040

Inspecting idling speed

EWM00450

WARNING

●Do not touch or remove electrical parts when starting or during operation.

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

●2-hp models: The propeller rotates whenever the engine is running. Do not move the throttle control lever from the start position during warm-up. The boat could unexpectedly start to move, which could result in an accident.

ECM00490

CAUTION:

This procedure must be performed while the outboard motor is in the water. A 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.

2-hp model: Warm the engine with the throttle in the start position or less. If the outboard is mounted on a boat, be sure

the boat is tightly moored.

NOTE:

Correct idling speed inspection is only possible if the engine is fully warmed up. If not warmed up fully, the idle speed will measure higher than normal. If you have difficulty verifying the idle speed, or the idle speed requires 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 33.

EMU29111

Checking wiring and connectors

●Check that each grounding wire is properly secured.

●Check that each connector is engaged se- curely.

ZMU03737

EMU29120

Exhaust leakage

Start the engine and check that no exhaust leaks from the joints between the exhaust cover, cylinder head, and body cylinder.

EMU29130

Water leakage

Start the engine and check that no water leaks from the joints between the exhaust cover, cylinder head, and body cylinder.

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