Ryobi RBC254FSB, User Manual

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20
English(Original instructions)
Ŷ The cutting attachment must not work in idle mode. If
this requirement is not satisfied, the clutch has to be
adjusted or the machine needs an urgent maintenance
by a qualified technician.
Ŷ You may make adjustments and repairs described
in this user manual. For other repairs, have the unit
serviced by an authorized service agent.
Ŷ Consequences of improper maintenance may
include excess carbon deposits resulting in loss of
performance and discharge of black oily residue
dripping from the silencer.
Ŷ Make sure all guards, straps, deflectors and handles
are properly and securely attached to avoid the risk of
personal injury.
STRING REPLACEMENT
See ¿ gure 15.
Ŷ Ensure the unit is in the off position
Ŷ Remove the spark plug lead to prevent accidental
starting.
Ŷ Use a 2.4 mm diameter monofilament string.
Ŷ Cut one piece of string approximately 6 m in length.
Ŷ Rotate the knob on the string head until the line on
knob aligns with the arrows on the top of string head.
Ŷ Insert one end of the string into the eyelet located on
the side of the string head and push until string comes
out through eyelet on the other side. Continue to push
string through the string head until the middle section
of the string is inside the string head and string outside
the string head is evenly divided on each side.
Ŷ Rotate the knob on the string head clockwise to wind
the string.
Ŷ Wind the string until approximately 20cm remains
protruding from the string head.
BLADE GUARD
See ¿ gure 16.
Always place the blade protector on the blade when the
unit is not in use. The blade protector has clips round the
edges to snap over the blade and keep it in place. Wear
gloves and be cautious when handling the blade.
NOTE: Always remove the blade protector before using
the unit. If not removed, the blade protector could become
a thrown object as the blade begins to turn.
CLEANING THE AIR FILTER
See ¿ gure 17.
Ŷ Ensure the unit is in the off position.
Ŷ Remove the spark plug cover.
Ŷ Loosen the air filter cover by turning the knob
counterclockwise.
Ŷ Remove the air filter cover.
Ŷ Remove the air filter and clean it with warm soapy
water.
Ŷ Rinse, and let the air filter dry completely.
Ŷ Work two drops of lubricant into the air filter.
Ŷ Replace the air filter (fits only one way).
Ŷ Replace the air filter cover. Tighten the knob securely.
Ŷ Replace the spark plug cover.
CHECKING THE FUEL CAP
WARNING
A leaking fuel cap is a ¿ re hazard and must be replaced
immediately.
The fuel cap contains a non-serviceable ¿ lter and a
check valve. A clogged fuel ¿ lter will cause poor engine
performance. If performance improves when the fuel cap
is loosened, check valve may be faulty or
¿ lter clogged.
Replace fuel cap if required.
REPLACING THE SPARK PLUG
See ¿ gure 18.
This engine uses a NGK CMR7A or a Champion RCJ4Y
spark plug. Use an exact replacement.
Ŷ Remove the spark plug cover.
Ŷ Remove the spark plug.
Ŷ Hand thread the new spark plug, turning it clockwise.
CAUTION
Be careful not to cross-thread the spark plug. Cross-
threading will seriously damage the engine.
REPLACING THE SPARK ARRESTER
See ¿ gure 19.
The spark arrester may need to be replaced after repeated
use. If replacement is necessary, use a spark arrestor with
part number 638268001.
To replace the spark arrester:
1. Remove the ¿ ve screws that hold the cover with a T20
and T25 torx screwdriver.
2. Remove the cover.
3. Remove the two screws holding the muf
À er assembly
in place.
4. Remove the muf À er assembly and muf À er gasket. It