Toro Z Master 74923, Operator'S Manual

Page: 36 / 68

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.
Note:
There are different spark plugs for the 23hp,
27hp, 29hp, and 34 hp engines. Ensure the correct spark
plug is used.
Type for 23hp, 27hp, and 29hp Engines: NGK ®
BPR4ES or equivalent
Type for 34hp Engines: NGK ® BPR5ES 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 the lefthand hydraulic unit shroud in the
order listed with Figure 50. This gives you access
to the front spark plug.
Figure 50
1. Pull this tab out to the
side in the direction of the
arrow 3. Pull the shroud off of this
frame tab in the direction
of the arrow
2. Pull the shroud off of this
frame tab in the direction
of the arrow 4. Shroud
4. Remove the spark plug.
G008803
Figure 51
5. Install the lefthand hydraulic unit shroud (Figure 50).
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