Toro 70185 Operator's Manual page 24

2. Shift the ground speed into Neutral (model 70185
only).
3. Set the parking brake.
4. Stop the engine and wait for all moving parts to stop.
5. Remove the ignition key.
6. Reach under the body of the machine above the left
rear wheel and disconnect the wire from the spark
plug (Figure 26).
1. Spark-plug wire
7. Clean around the spark plug to prevent dirt from
falling into the engine and potentially causing
damage.
8. Remove the spark plug and metal washer.
Checking the Spark Plug
1. Look at the center of the spark plug (Figure 27).
If you see light brown or gray on the insulator, the
engine is operating properly. A black coating on the
insulator usually means that the air cleaner is dirty.
1. Center electrode insulator
2. Side electrode
Figure 26
2. Spark plug
Figure 27
3. Air gap (not to scale)
Important: Do not clean the spark plug. Always
replace the spark plug when it has a black
coating, worn electrodes, an oily film, or cracks.
2. Check the gap between the center and side electrodes
(Figure 27) and bend the side electrode if the gap
is not correct.
Installing the Spark Plug
1. Install the spark plug and metal washer.
Note: Ensure that the air gap is set correctly.
2. Tighten the spark plug to 20 N-m.
3. Connect the wire to the spark plug (Figure 26).
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