Yamaha EF2400iSHC Owner's Manual download pdf (Page 27)

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760-031

760-001a

AE01051

SPARK PLUG INSPECTION

The spark plug is an important engine component,

which should be checked periodically.

1. Remove the screws 1 and side cover 2.

2. Remove the spark plug cap 3 and the spark plug.

3. Check for discoloration and remove the carbon.

The porcelain insulator around the center elec-

trode of spark plug should be a medium-to-light tan

color.

4. Check the spark plug type and gap

TIP

The spark plug gap should be measured with a wire

thickness gauge and, if necessary, adjusted to specifi-

cation.

5. Install the spark plug.

TIP

If a torque wrench is not available when installing a

spark plug, a good estimate of the correct torque is 1/4-

1/2 turn past finger tight.

However, the spark plug should be tightened to the

specified torque as soon as possible.

6. Install the spark plug cap.

7. Install the side cover and tighten the screws.

Standard spark plug:

BPR4ES (NGK)

Spark plug gap

0.7–0.8 mm (0.028–0.031 in)

Spark plug torque:

20 Nm (2.0 m·kgf, 14 ft·lbf)

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Yamaha EF2400iSHC Owner's Manual Page 27