Checking the Spark Plug(s)
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 34
Installing the Spark Plug(s)
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Figure 35
Fuel System
Maintenance
DANGER
In certain conditions, fuel is extremely
ammable and highly explosive. A re or
explosion from fuel can burn you and others
and can damage property .
Refer to Fuel Safety ( page 13 ) for a complete
list of fuel related precautions.
Draining the Fuel T ank
1. Park the machine on a level surface, engage
the parking brake (if applicable), and lower the
grinder .
2. Shut of f the engine and remove the key .
3. T urn the fuel-shutof f valve to the closed position
( Figure 36 ).
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Figure 36
1. Fuel-shutof f valve
4. Squeeze the ends of the hose clamp on the
engine side of the valve together and slide it up
the fuel line away from the valve ( Figure 36 ).
5. Pull the fuel line of f the valve ( Figure 36 ).
6. Open the fuel-shutof f valve and allow the fuel to
drain into a fuel can or drain pan.
Note: If desired, you can replace the fuel lter
at this time; refer to Replacing the Fuel Filter
( page 28 ) .
7. Install the fuel line onto the fuel-shutof f valve.
Slide the hose clamp close to the valve to secure
the fuel line.
8. Wipe up any spilled fuel.
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