Spark Plug Inspection - Yamaha EF2000iS Owner's Manual

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Spark plug inspection

The spark plug is an important engine component,
which should be checked periodically.
1. Remove the screws 1, and then remove the cover
2.
7DK-030
2. Remove the spark plug cap 3 and cap 4, and
4
3
insert the tool 5 through the hole from the outside
of the cover.
7DK-053
3. Insert the handlebar 6 into the tool 5 and turn it
5
counterclockwise to remove the spark plug.
7DK-054
4. 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.
5. Check the spark plug type and gap a.
Standard spark plug:
BPR6HS (NGK)
Spark plug gap a:
0.6–0.7 mm (0.024–0.028 in)
760-001a
TIP
The spark plug gap should be measured with a wire
thickness gauge and, if necessary, adjusted to specifi-
cation.
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