Cleaning The Cooling System - Toro 74635 Operator's Manual

Figure 34
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: Never 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 inches).
1
Figure 35
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G008794
Installing the Spark Plug
Tighten the spark plug(s) to 22 N-m (16 ft-lb).
16 ft-lb
22 N-m

Cleaning the Cooling System

Clean the air intake screen from grass and debris before each
use.
1. Disengage the blade control switch and move the
control levers to the neutral locked position and apply
the parking brake.
2. Stop the engine, remove the key, and wait for all moving
parts to stop before leaving the operating position.
3. Remove the air intake screen, air cleaner cover, and
fan housing.
4. Clean debris and grass from the parts.
5. Install the air intake screen, air cleaner cover, and fan
housing.
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G010687
Figure 36