Ryobi RPT-43W, Owner'S Operating Manual

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3. Remove and clean foam filter. (Fig. 31)
• Light surface dust can readily be removed by tapping
the filter.
• Heavy deposits should be washed out in soap and
water. Squeeze out any remaining water and allow the
filter to completely dry.
WARNING!
Never clean filter in gasoline or other flammable solvents.
4. Add four drops of thin oil to the foam filter, squeeze out
excess and replace.
5. Remove the paper air filter element. (Fig 32) Clean filter
by gently tapping it on a flat surface. Replace if very dirty.
6. Replace the filter element and air filter cover.
1. Before removing air filter cover, brush away any loose
dirt or debris on and around the pre-filter located in the
outer filter housing.
2. Remove air filter by unscrewing the retaining fastener.
(Fig. 29)
Techniques / Applications:
Trimming Tip
To extend the life of the trimmer line, keep the trimmer line
moist. If not kept moist, the nylon line will become dry and
brittle. Keep extra trimmer line in a container of water. The
line will stay flexible and easy to change. A flexible line will
also last longer.
NOTICE
It is recommended that the engine air intake screen be
cleaned every time the trimmer line is replaced. Failure to
keep the air intake screen clean may result in overheating
and damage to engine.
WARNING!
Thoroughly inspect the area where the Trimmer is to be
used and remove all foreign objects. Your equipment can
throw small objects at high speed causing personal injury or
property damage.
Your Trimmer is most effective when using the tips of the
trimmer line for trimming grass and other vegetation. Do not
force the trimmer line into grass or vegetation faster than
Trimmer’s cutting speed permits. Forcing the Trimmer will
cause your Trimmer to be less effective, and may cause the
engine to overheat.
Air Filter:
Your Trimmer has been equipped with two air filters inside
the housing. Accumulated debris and dust in the air filter
will reduce engine performance, increase fuel consumption
and increases the risk of engine damage. Clean the air
filters every 5 hours of operation. It may be necessary to
clean the air filter more often in dry conditions due to a
large amount of airborn debris.
ROUTINE MAINTENANCE
WARNING!
Disconnect the spark plug before performing maintenance.
1. Allow engine to cool and empty the fuel tank before
storing or transporting in vehicle. Use up remaining fuel
in the carburetor by starting the engine and letting it run
until it stops.
2. When not in use, store Trimmer indoors in a dry location.
Store Trimmer in a locked area out of the reach of
children.
3. Store unit and fuel in area where fuel vapors cannot
reach sparks or open flames from water heaters, electric
motors or switches, furnaces, etc.
STORAGE
1. Stop the engine and disconnect the spark plug wire.
2. Allow the unit to cool.
3. Using a dry cloth or brush, remove debris from the
screen. The screen is located between the engine and
the fuel tank and is accessible on all sides.
4. The front flexible shield can be deflected for access to
the front screen.
WARNING!
The engine and exhaust system may be hot and can cause
skin burns. Allow engine to cool and use caution around hot
surfaces.
Spark Plug:
Inspect the spark plug after every 10-15 hours of use; adjust
spark plug gap and replace spark plug as necessary.
Replace spark plug every year to maintain engine
performance and easy starting.
To inspect or replace the spark plug:
1. Remove the insulated spark plug boot.
2. Use the spark plug wrench to remove the spark plug, by
turning counter-clockwise.
3. Clean and adjust the spark plug gap to 0.6 - 0.7 mm.
4. Replace any worn plug with a recommended replace-
ment (see PRODUCT SPECIFICATIONS) Clean and
adjust the spark plug gap to 0.6 - 0.7 mm.
Trimmer Head:
1. If the string retention parts become filled with debris, they
can be removed using a 5 mm hex wrench. When
reinstalling, only tighten to 5 N.m and assure the inner
part is free to move.
2. If it is necessary to remove the trimmer bowl and head
note that the large retaining nut has a left hand thread
(i.e. to remove the nut turn clockwise).
Engine Air Intake Screen:
NOTICE
It is critical that the engine air intake screen be cleaned of
debris to maintain acceptable engine temperatures. It is
recommended that the screen be cleaned every time the
trimmer string is replaced.