Cleaning The Blower Housing; Checking The Spark Plug; Installing The Spark Plug - Toro TimeCutter Z4200 Operator's Manual

Note: Due to the deep recess around the spark
plug, blowing out the cavi g 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.
3. Remove the spark plug and metal washer.
1.
Figure 26
Spark plug and wire location
2. Tighten the spark plug to 30 ft-lb (41 N-m).
3. Push the wire onto the spark plug (Figure 26).
Cleaning the Blower Housing
To ensure proper cooling, make sure the grass screen,
cooling fins, and other external surfaces of the engine
are kept clean at all times.
Annually or every 100 hours of operation (more often
under extremely dust B dirt3- conditions), remove the
blower housing and any other cooling shrouds. Clean
the cooling fins and external surfaces as necessar> Make
sure the cooling shrouds are reinstalled. Torque the
blower housing screws to 5.5 ft-lb (7.5 N-m).
Important: Operating the engine with a blocked
grass screen, dirty or plugged cooling fins, and/or
cooling shrouds removed, will cause engine damage
due to overheating.
Checking the Spark Plug
,
Look at the center of the spark plug (Figure 27).
If you see light brown or gray on the insulator, the
engine is operating proper1> A black coating on the
insulator usually means the air cleaner is dirt>
,
Important: Never clean the spark plug. Always
replace the spark plug when it has a black
coating, worn electrodes, an oily film, or cracks.
Check the gap between the center and side electrodes
(Figure 27). Bend the side electrode (Figure 27) if
the gap is not correct.
2
G000533
I
3
/
0,030 inch
(0.76 mm)
Figure 27
1. Center electrode insulator 3. Air gap (not to scale)
2. Side electrode
Installing the Spark Plug
1. Install the spark plug. Make sure that the air gap is
set correctl>
25