Check The Spark Arrester (If Equipped) - Toro 74955 Operator's Manual

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Figure 51
5. Install the left hydraulic unit shroud
Checking the Spark Plug
Important: Replace the spark plug(s) when it has: a
black coating, worn electrodes, an oily film, cracks or
reuse is questionable.
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.
Set the gap to 0.76 mm (0.030 inches).
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Figure 52
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(Figure 50).
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Installing the Spark Plug
Tighten the spark plug(s) to 24.4–29.8 N-m (18-22 ft.-lb).
Check 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. Stop the engine, wait for all moving parts to stop, and
remove the key. Engage the parking brake.
2. Wait for the machine to cool.
3. If there are any breaks in the screen or welds are
observed, replace the arrester.
4. If the screen is plugged, remove the arrester and shake
loose any particles out of the arrester and clean the
screen with a wire brush (soak in solvent if necessary).
Install the arrester on an exhaust outlet.
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Figure 53