Checking The Spark Arrester - Toro 39521 Operator's Manual

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 spark plug is dirty.
Set the gap to 0.75 mm (0.03 inch).
Figure 46
Installing the Spark Plug
Tighten the spark plug(s) to 22 N∙m (16 ft-lb).
Figure 47
Checking the Spark
Arrester
Machines with a Spark Arrester
Only
Service Interval: Every 50 hours
WARNING
Hot exhaust system components may ignite
fuel vapors even after the engine is shut
off. 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.
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1. Shut off the engine, engage the parking brake,
remove the key, and wait for all moving parts to
stop before leaving the operating position.
2. Allow the muffler to cool.
3. Check the spark arrester for breaks in the
screen or welds.
Note:
Replace the spark arrester if it is worn
or damaged.
4. If you see that the screen is plugged, perform
the following:
A. Remove the spark arrester.
B. Shake loose the particles from the arrester
and clean screen with a wire brush.
Note:
if necessary.
C. Install spark arrester onto exhaust outlet.
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Soak the arrester screen in solvent