Replacing The Spark Plug; Lubricating The Lawn Mower - Toro 20487 Operator's Manual

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Figure 20
1. Knobs
2. Cover
4. Lift the cover off and clean it thoroughly.
5. Carefully remove the pre-cleaner. If the pre-cleaner is
dirty, carefully wash it in a solution of liquid soap and
warm water. Rinse the pre-cleaner in clear water.
Allow it to dry thoroughly before using.
6. If the paper cartridge is dirty, clean the paper filter by
tapping it gently on a flat surface. If it is very dirty,
replace it.
IMPORTANT: Do not oil the pre-cleaner or the paper
cartridge. Do not use pressurized air to clean the paper
cartridge.
7. Install the pre-cleaner over the paper cartridge.
8. Install the air cleaner cover and tighten it securely in
place with the two knobs.

Replacing the Spark Plug

Remove the spark plug every 25 operating hours and
check its condition. Replace the spark plug every 100
operating hours or yearly. Use a Champion RC12YC spark
plug or equivalent.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug (Fig. 8).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
IMPORTANT: Replace a cracked, fouled, or dirty
spark plug. Do not clean the electrodes because grit
entering the cylinder can cause engine damage.
5. Set the gap on the new plug to 0.020 in. (0.50 mm)
(Fig. 21).
m-3664
3. Foam pre-cleaner
4. Paper cartridge
.020 inch
(.50 mm)
6. Install the spark plug and the gasket seal.
7. Torque the spark plug to 14 ft-lb (19 N m).
8. Connect the wire to the spark plug.

Lubricating the Lawn Mower

After every 25 operating hours or yearly, lubricate the
front and rear wheels.
1. Apply two or three drops of light oil on the inside and
outside of all wheel bolts.
2. Spin the wheels to distribute the oil into the bushings.
Wipe up any excess oil.
3. Move the rear wheel height-of-cut levers to the C
setting.
4. Wipe the grease fittings with a clean rag.
5. Install a grease gun onto each fitting and gently apply
two or three pumps of #2 multi-purpose lithium base
grease (Fig. 22).
IMPORTANT: Apply the grease using excess pressure
may damage the seals and prevent the free wheel
clutch from operating properly.
1. Grease fitting
19
Figure 21
1
276
Figure 22
986