Servicing the Spark Plug
Service Interval:
Yearly—Service the spark plug and
replace it if necessary.
Use a
NGK BPR6ES or Champion RN9YC
spark
plug or equivalent.
1.
Shut off the engine and wait for all moving parts
to stop.
2.
Rotate the discharge chute so that it faces
forward.
3.
Remove the discharge chute by removing the 3
screws holding the chute and the screws holding
the chute seal (
).
g016327
Figure 24
4.
Remove the 4 screws that secure the shroud
(
).
g011435
Figure 25
1.
Screw (4)
3.
Spark plug
2.
Shroud
4.
Spark-plug wire
5.
Remove the fuel-tank cap.
6.
Remove the shroud (
7.
Install the fuel-tank cap.
8.
Disconnect the wire from the spark plug.
9.
Clean around the spark plug.
10.
Remove the spark plug from the cylinder head.
Important:
Replace a cracked, fouled, or
dirty spark plug. Do not clean the electrodes
because grit entering the cylinder can
damage the engine.
11.
Set the gap on the plug to 0.030 inch (0.76 mm)
as shown in
.
g000533
Figure 26
1.
Center-electrode insulator
3.
Air gap (not to scale)
2.
Side electrode
15
Summary of Contents for Power Clear 721 R
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