Servicing The Spark Plug - Toro Z Master 74925TE Operator's Manual

Servicing the Spark Plug

Service Interval: Every 100 hours
Make sure the air gap between the center and side
electrodes is correct before installing the spark plug.
Use a spark plug wrench for removing and installing
the spark plug(s) and a gapping tool/feeler gauge to
check and adjust the air gap. Install a new spark plug(s)
if necessary.
Type : Champion ® RC12YC or equivalent
Air Gap: 0.030 inch (0.76 mm)
Removing the Spark Plug
Important: The fasteners on the covers of this
machine are designed to remain on the cover after
removal. Loosen all of the fasteners on each cover a
few turns so that the cover is loose but still attached,
then go back and loosen them until the cover
comes free. This will prevent you from accidentally
stripping the bolts free of the retainers.
1. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
2. Disengage the PTO, move the motion control levers
to the neutral locked position and set the parking
brake.
3. Remove the hydraulic unit shroud and the 2 bolts
attached to it (Figure 53). This gives you access to
the front spark plug.
2 1 2
1. Hydraulic unit shroud
4. Remove the spark plug.
G012432
Figure 53
2. Loosen these two bolts
G008803
5. Install the lefthand hydraulic unit shroud (Figure 53).
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 0.030 inches (0.76 mm).
1
40
Figure 54
2
G008794
Figure 55