Servicing The Spark Plug; Checking The Spark Arrester (If Equipped) - Toro 23515 Operator's Manual

Servicing the Spark Plug

Service Interval: Every 100 hours—Inspect, clean, and
adjust the spark plug; replace it if
necessary.
Every 200 hours—Replace the spark plug.
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 damage the engine.
5. Set the gap on the plug to 0.76 mm (0.030 inch) as
shown in Figure 24.
1. Side electrode
2. Center-electrode insulator
3. Air gap—0.76 mm (0.30 inch)
6. Carefully install the spark plug by hand (to avoid cross
threading) until it is hand tight.
7. Tighten the spark plug an additional 1/2 turn if it is
new; otherwise, tighten it an additional 1/8 to 1/4 turn.
Important: A loose spark plug can become very
hot and can damage the engine; overtightening a
spark plug may damage the threads in the cylinder
head.
8. Connect the wire to the spark plug.
Figure 24
Checking the Spark Arrester
(if equipped)
Service Interval: Every 50 hours
WARNING
Hot exhaust system components may ignite
gasoline vapors even after the engine is stopped.
Hot particles exhausted during engine operation
may ignite flammable materials. Fire may result in
personal injury or property damage.
Do not refuel or run engine unless spark arrester
is installed.
1. Raise the tines, stop the machine, stop the engine, and
disconnect the spark-plug wire.
2. Wait for the muffler to cool.
3. If you observe any breaks in the screen or welds,
replace the spark arrester.
4. If the screen is plugged, remove the spark arrester,
shake the loose particles out of it, and clean the screen
with a wire brush (soak in solvent if necessary). Replace
the spark arrester when finished.
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