Ryobi ZR51950A - Manual (Page 20)

20 21
WARNING:
When servicing, use only Ryobi replacement
parts. Use of any other parts may create a haz-
ard or cause product damage.
Cleaning the Product
■ Stop the product before cleaning.
■ Clean the exterior of the product with a damp cloth.
■ Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use.
■ Wipe or scrape the trimmer head and spool area when
they accumulate dirt or clippings.
■ Scrape debris away from air intake vents on both sides
of the motor housing.
CAUTION:
Keeping air intake vents free of grass and debris
prevents motor overheating and possible failure.
Note: Depending on the type of fuel used, the type and
amount of oil used, and/or your operating conditions,
the exhaust port and muffler may become blocked with
carbon deposits. If you notice a power loss with your
gas powered tool, you may need to remove these depos-
its to restore performance. We highly recommended that
only qualified service technicians perform this service.
Servicing the Product
■ Check and tighten all fasteners. If any part is damaged
or lost, repair it or replace it.
Maintenance
Emissions Maintenance Schedule
Maintenance, replacement, or repair of the emission control device and systems may be performed by any non-
road engine repair establishment or individual.
Emission Part
Inspect before
each use
Clean every
5 hours
Replace every 25
hours or yearly
Clean every 25
hours or yearly
X
X X
X
X
Fuel Tank Assembly (Includes Fuel
Lines, Fuel Cap, and Fuel Filter)
Air Filter
Spark Arrester
Spark Plug
Replacing the Cutting Line
See Figures 20 and 21.
WARNING:
Use of line other than the proper monofilament
cutting line could cause personal injury.
Follow these steps to replace the cutting line.
1.
Stop the trimmer.
WARNING:
Make sure the trimmer head stops rotating.
Contact with a rotating trimmer head could
cause personal injury.
2. Remove the spark plug boot. See Figure 24.
3. Remove the retaining cap.
4. Remove the empty spool.
5. Clean the trimmer head thoroughly. Inspect the trimmer
head for any damaged or worn parts.
6. Hold the spool with the spring positioned upward.
7. Insert the end of the new line into the hole in the upper
threaded area of the spool.
8. Wind the line around the spool as indicated by the ar-
rows on the top of the spool until the line reaches the
edge of the spool. Do not wind the line beyond the
edge of the inner ring.
9. Secure the line temporarily by pushing it into one of the
slotted tabs on the spool.
10. Measure six inches of line from the slotted tab and cut
the line at that point.
Maintenance