Toro GrandStand 71504 - Checking the Spark Arrester

Removing the Spark Plug
1. Park the machine on a level surface, disengage
the PT O, and engage the parking brake.
2. Shut of f the engine, remove the key , and wait
for all moving parts to stop before leaving the
operating position.
3. Remove the spark plug as shown in Figure 44 .
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Figure 44
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 lm, 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 0.75 mm (0.03 inch).
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Figure 45
Installing the Spark Plug
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Figure 46
Checking the Spark
Arrester
For Machines with a Spark
Arrester
Service Interval : Every 50 hours
W ARNING
Hot exhaust-system components may ignite
fuel vapors even after you shut off the engine.
Hot particles exhausted during engine
operation may ignite ammable 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
the PT O, and engage the parking brake.
2. Shut of f the engine, remove the key , and wait
for all moving parts to stop before leaving the
operating position.
3. W ait for the muf er 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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