Checking The Spark Arrester - Toro 74969 Operator's Manual

5. Install the left hydraulic-unit shroud
Checking the Spark Plug
Important:
Do not clean the spark plug(s).
Always replace the spark plug(s) when it has a
black coating, worn electrodes, an oily film, or
cracks.
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 (0.03 inch).
Figure 64
Installing the Spark Plug
Figure 65
Checking the Spark
(Figure 62).
Arrester
For Machines with a Spark
Arrester
Service Interval: Every 50 hours
WARNING
Hot exhaust-system components may ignite
fuel vapors even after you shut off the engine.
Hot particles exhausted during engine
operation may ignite flammable materials,
resulting in personal injury or property
damage.
Do not refuel or run the engine unless the
spark arrester is installed.
1. Park the machine on a level surface, disengage
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the PTO, and engage the parking brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Wait for the muffler to cool.
4. If you see any breaks in the screen or welds,
replace the arrester.
5. If the screen is plugged, remove the arrester,
shake loose particles out of the arrester, and
clean the screen with a wire brush (soak the
screen in solvent if necessary).
6. Install the arrester on the exhaust outlet.
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