Servicing The Spark Plug - Toro 74502 Operator's Manual

Cleaning the Foam and Paper Elements
Foam Element:
1. Wash the foam element in liquid soap and warm water.
When the element is clean, rinse it thoroughly.
2. Dry the element by squeezing it in a clean cloth. Do not
oil the element.
Important
Replace the foam element if it is torn or
worn.
Paper Element:
1. Lightly tap the element on a flat surface to remove dust
and dirt.
2. Carefully clean the rubber seal on the paper element to
prevent debris from entering the engine.
3. 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.
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. Place the foam element and paper element into the
blower housing.
Note: Make sure that the rubber seal is flat against the air
cleaner base.
2. Align the tabs on the air cleaner cover with the slots of
the blower housing (Fig. 20). Hook the handle onto the
cover and press down on the handle to lock the cover in
place.

Servicing the Spark Plug

Replace the spark plug after every 100 operating hours.
Make sure that 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 if necessary.
Type: Champion RC12YC (or equivalent)
Air Gap: 0.030 in. (0.76 mm)
Removing the Spark Plug
1. Disengage the PTO, set the parking brake, stop the
engine, and remove the key.
2. Pull the wire off of the spark plug (Fig. 21). Clean
around the spark plug to prevent dirt from falling into
the engine and potentially causing damage.
3. Remove the spark plug and metal washer.
1
1. Spark plug wire
Checking the Spark Plug
1. Look at the center of the spark plug (Fig. 22). 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. 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
(Fig. 22). Bend the side electrode (Fig. 22) if the gap is
not correct.
2
1
1. Center electrode insulator
2. Side electrode
22
Figure 21
3
0.030 in.
(0.76 mm)
m–3215
Figure 22
3. Air gap (not to scale)