Toro 74447TE Operator's Manual page 39

Removing the Spark Plug
1. Disengage the PTO and engage the parking brake.
2. Shut off the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
A
g027478
Note: Due to the deep recess around the spark plug,
blowing out the cavity with compressed air is usually
the most effective method for cleaning. The spark plug
is most accessible when the blower housing is removed
for cleaning.
Checking the Spark Plug
Important: Do not clean the spark plug(s). Always
replace the spark plug(s) when it has: a black coating,
worn electrodes, an oily film, or cracks.
If you see light brown or gray on the insulator, the engine is
operating properly. A black coating on the insulator usually
means the air cleaner is dirty.
Set the gap to 0.76 mm (0.030 inch).
A
B
Figure 49
B
g027479
Figure 50
Installing the Spark Plug
Tighten the spark plug(s) to 25 to 30 N∙m (19 to 22 ft-lb).
g027478
Cleaning the Cooling System
Clean the air-intake screen from grass and debris before each
use.
1. Disengage the blade-control switch and engage the
parking brake.
2. Shut off the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Remove the air filter from the engine.
4. Remove the engine shroud.
5. To prevent debris entering the air intake, install the air
filter to the filter base.
6. Clean debris and grass from the parts.
g027479
7. Remove the air filter and install the engine shroud.
8. Install the air filter.
39
Figure 51
g027735