Maintenance

Standard spark plug:

LFR6A-11

2.Measure the spark plug gap using a thickness gauge. If the spark plug gap is out of specification, replace the spark plug with the specified plug.

1.Spark plug gap

2.Spark plug part number

3.Spark plug I.D. mark (NGK)

Spark plug gap:

1.0–1.1 mm (0.039–0.043 in)

To install the spark plug

1.Wipe off any dirt from the threads, insula- tor, and gasket surface of the spark plug.

2.Install the spark plug, and then tighten it to the specified torque.

Spark plug tightening torque: 28.0 Nm (2.86 kgf-m, 20.7 ft-lb)

TIP:

If a torque-wrench is not available when you are fitting a spark plug, fully tighten a spark plug with a spark plug wrench. Then tighten 1/4 to 1/2 turn more. Have the spark plug adjusted to the correct torque as soon as possible with a torque-wrench.

3.Install the ignition coil, and then tighten the bolt to the specified torque.

Bolt tightening torque:

8.0Nm (0.82 kgf-m, 5.9 ft-lb)

4.Install the ECM cover.

5.Install the flywheel magnet cover.

EMU40872

Inspecting engine idle speed

ECM01690

NOTICE

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

Inspect the engine idle speed using the Command Link tachometer or digital tachometer that is equipped on the boat. Results may vary depending on whether testing is conducted 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.Inspect the engine idle speed. If the en- gine idle speed is out of specification, consult a Yamaha dealer or other quali- fied mechanic.

Idle speed (in neutral): 750 ±50 r/min

EMU41203

Changing engine oil

ECM01710

NOTICE

Change the engine oil after the first 20 hours of operation or 3 months, and every 100 hours or at 1-year intervals thereafter. Otherwise the engine will wear quickly.

When changing the engine oil, the outboard motor must be placed in a vertical position. If you are not able to place the outboard motor in a vertical position, have a Yamaha dealer change the engine oil.

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