Servicing The Spark Plug - Toro Z MASTER G3 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: NGK ® BPR4ES or equivalent
Air Gap: 0.030 inch (0.75 mm)
Removing the Spark Plug
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 two bolts securing the hydraulic unit shroud
and remove it Figure 52. This gives you access to
the front spark plug.
1. Remove the two bolts
securing the hydraulic unit
shroud
4. Remove the spark plugs.
Figure 52
2. Hydraulic unit shroud
5. Install the lefthand hydraulic unit shroud (Figure 52).
Checking the Spark Plugs
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
Installing the Spark Plugs
Tighten the spark plug(s) to 16 ft.-lb (22 N-m).
39
Figure 53
2
G008794
Figure 54
Figure 55