Ryobi ZR51950A - Manual (Page 22)

22 23
Checking the Fuel Cap
WARNING:
A leaking fuel cap is a fire hazard and must be
replaced immediately.
The fuel cap contains a non-serviceable filter and check
valve. A clogged fuel filter causes poor engine performance.
If performance improves when the fuel cap is loosened,
the check valve may be faulty or the filter may be clogged.
Replace the fuel cap if necessary.
Cleaning the Air Filter
See Figure 22.
Clean the air filter as indicated by the maintenance schedule.
Follow these steps to clean the air filter.
1.
Stop the trimmer.
WARNING:
Make sure the trimmer head stops rotating when
you release the trigger. Contact with a rotating
trimmer head could cause personal injury.
2. Remove the spark plug boot.
3. Loosen the air filter cover by turning the knob counter-
clockwise.
4. Remove the air filter cover.
5. Remove the air filter.
6. Clean the air filter with warm soapy water.
7. Rinse the air filter and let it dry completely.
8. Work two drops of oil into the air filter.
9. Replace the air filter (fits only one way).
10. Replace the air filter cover.
11. Tighten the air filter cover by turning the knob clock-
wise.
12. Replace the spark plug boot.
Note: Replace the air filter (Part No. 88048) as indi-
cated by the maintenance schedule.
Replacing the Spark Arrester
See Figure 23.
The spark arrester may need to be replaced after repeated
use. If replacement is necessary, use Ryobi part number
986179001.
To replace the spark arrester:
1.
Remove the five screws that hold the cover.
Note: Removing these screws requires the use of a T20
and T25 torx screwdriver.
2. Remove the cover.
3. Remove the muffler assembly and muffler gasket. It
may be necessary to work the muffler assembly free
from the muffler gasket.
4. Remove the three screws that hold the plates on the
muffler.
5. Remove the spark arrester.
6. Replace the old spark arrester with the new one.
7. Reassemble the muffler by reinstalling the plates and
tightening the three screws.
8. Reassemble the muffler and muffler cover and attach to
the muffler gasket with the two screws.
9. Reinsert the muffler assembly.
10. Reinstall the cover on the tool and fasten with the five
screws.
Note: Do not overtighten screws.
Figure 22
Figure 23
Maintenance
Air Filter
Air
Filter
Cover
Knob
Spark
Arrester
Plates
Muffler
Cover
Muffler
Gasket
Screw(s)
Screw(s)
Cover
Screw(s)
Muffler