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Servicing the Spark Plugs
Service Interval: Every 750 hours—Change the
spark plugs.
Type: Toro Part 145-2128; refer to your authorized
Toro distributor.
Air Gap: 1 mm (0.04 inch)
Important:
A cracked, fouled, dirty, or
malfunctioning spark plug must be replaced. Do
not sand-blast, scrape, or clean electrodes by
using a wire brush because grit may eventually
release from the plug and fall into the cylinder.
The result is usually a damaged engine.
Note:
The plug should be removed and checked
whenever the engine malfunctions.
1.
Clean the area around the spark plug so that
foreign matter cannot fall into the cylinder when
you remove the spark plug.
2.
Pull the wire off the terminal of the spark plug.
3.
Remove the plug from the cylinder head.
4.
Check the condition of the side electrode, center
electrode, and center electrode insulator to
ensure that there is no damage
Note:
Do not use a damaged or worn spark
plug. Replace it with a new spark plug of the
specified type.
5.
Set the air gap between the center and side of
the electrodes at 1 mm (0.04 inch) as shown in
Figure
88.
6.
Install the spark plug into the cylinder head, and
torque the plug to 20 to 28 N∙m (15 to 21 ft-lb).
7.
Install the spark-plug wire.
8.
Repeat steps
1
through
plug.
Figure 88
1. Side electrode
2. Center electrode insulator
(Figure
88).
7
for the other spark
g388221
3. Air gap (not to scale)—1
mm (0.04 inch)
83
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