Checking The Spark Arrester - Toro 74946 Operator's Manual

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).
A
Figure 54
Installing the Spark Plug
Tighten the spark plug(s) to 24.4 to 29.8 N·m (18 to 22 ft-lb).
Figure 55
B
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Checking the Spark Arrester

For a Model with a Spark Arrester
Service Interval: Every 50 hours
WARNING
Hot exhaust system components may ignite
gasoline vapors even you shut off the engine. Hot
particles exhausted during engine operation may
ignite flammable materials. Fire may result in
personal injury or property damage.
Do not refuel or run the engine unless a spark
arrester is installed.
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Wait for muffler to cool.
3. If there are any breaks in the screen or welds, replace
the arrester.
4. If the screen is plugged, remove the arrester and
shake the loose particles out of the arrester and clean
the screen with a wire brush (soak it in solvent if
necessary). Install the arrester on the exhaust outlet.
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