Spark Plug - Toro 74405 Operator's Manual

2. Paper Element
A. Lightly tap the element on a flat surface to remove
dust and dirt (Fig. 22).
B. Inspect the element for tears, an oily film, and
damage to the rubber seal.
Important Never clean the paper element with
pressurized air or liquids, such as solvent, gas, or kerosene.
Replace the paper element if it is damaged or cannot be
cleaned thoroughly.
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Figure 22
1. Paper element
Installing the Foam and Paper Elements
Important
To prevent engine damage, always operate
the engine with the complete foam and paper air cleaner
assembly installed.
1. Carefully slide the foam element into the paper air
cleaner element (Fig. 20).
2. Place the air cleaner assembly onto the air cleaner base
and install the wing nut (Fig. 20).
3. Install the air cleaner cover and latch it (Fig. 20).

Spark Plug

Check the spark plug(s) after every 100 operating 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 RCJ8Y (or equivalent)
Air Gap: 0.030 inch (0.76 mm)
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m–4293
2. Rubber seal
25
Removing the Spark Plug
1. Disengage the PTO and move the control levers to the
neutral locked position and apply the parking brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Pull the wire(s) off of the spark plug(s) (Fig. 23). Clean
around the spark plug(s) to prevent dirt from falling into
the engine and potentially causing damage.
4. Remove the spark plug(s) and metal washer.
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Figure 23
1. Spark plug wire installed
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 24). 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.
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.
(s)
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2. Spark plug