Servicing The Spark Plug; Replacing The Air Filter - Toro 20833 Operator's Manual

A broken or missing washout fitting could
expose you and others to thrown objects or to
the blade, causing injury or death.
• Replace a broken or missing washout fitting
immediately before using the lawn mower
again.
• Plug any hole(s) in the lawn mower with
bolts and locknuts.
• Never put your hands or feet under the lawn
mower or through openings in the lawn
mower.
Scraping Method
If washing does not remove all the debris from under
the housing, tip the lawn mower and scrape it clean.
1. Disconnect the wire from the spark plug.
2. Drain the gasoline from the fuel tank. Refer to
Emptying the Fuel Tank.
3. Remove the grass bag.
4. Tip the lawn mower onto its left side.
5. Remove the dirt and grass clippings with a hardwood
or plastic scraper. Avoid burrs and sharp edges.
Important: Move the blade as little as possible
to avoid future starting problems.
6. Turn the lawn mower upright.
7. Fill the fuel tank.
8. Connect the wire to the spark plug.

Replacing the Air Filter

Service Interval: Yearly—Replace the air filter
(more frequently in dusty operating
conditions).
1. Perform the pre-maintenance procedures; refer to
Preparing for Maintenance.
2. Open the air filter cover and remove the old air filter
(Figure 22).
3. Install a new air filter and the air filter cover.

Servicing the Spark Plug

Service Interval: Every 25 hours—Check the spark
plug.
Use a Champion RJ19LM spark plug or equivalent.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug.
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 0.030 in. (0.76 mm)
(Figure 23).
1. Center electrode insulator
2. Side electrode
6. Install the spark plug and the gasket seal.
7. Torque the spark plug to 15 ft-lb (20 N-m).
8. Connect the wire to the spark plug.
13
Figure 22
Figure 23
3. Air gap (not to scale)