Ryobi RCS4240B Mode D'emploi page 36

CLEANING THE STARTER UNIT
See figure 60.
Use a brush or compressed air to keep the cooling vents
of the starter assembly free and clean of debris.
ADJUSTING THE CARBURETTOR
See figure 61.
Before adjusting the carburettor:
■ Use a brush to clean the starter cover vents.
■ Clean the air filter.
■ Allow the engine to warm up prior to adjustment of
engine idle speed.
WARNING
Weather conditions and altitude may affect carburetion.
Do not allow bystanders close to the chainsaw while
adjusting the carburettor.
Idle speed adjustment
■ Turn idling speed screw "T" clockwise to increase
idling speed.
■ If chain turns at idle, turn idling speed screw "T"
anticlockwise to decrease speed.
WARNING
The saw chain should never turn at idle. Serious
personal injury may result from the saw chain turning
at idle.
CLEANING THE ENGINE
See figure 58. See figure 62 - 64.
Clean the engine fins and flywheel fins with compressed
air or a brush periodically. Dangerous overheating of the
engine may occur due to impurities on the engine.
WARNING
Never run the saw without all the parts, including the
drivecase cover and starter housing, securely in place.
Because parts can fracture and pose a danger of thrown
objects, leave repairs of the flywheel and clutch to factory
trained authorised service centre personnel.
■ Remove the screws and Engine cover as described
previously.
■ Clean the Engine fins.
■ Lift the chain brake over the post.
English (Original instructions)
■ Lay the chainsaw on its side with the bar and chain
■ Remove the chain lubricant and fuel caps.
■ Remove the three screws that hold the starter housing
■ Lift off the starter cover and set aside.
■ Replace chain lubricant and fuel caps to prevent
■ Clean the flywheel fins.
■ Replace the starter housing. Reinstall screws and
■ Replace the chain lubricant and fuel caps.
■ Replace the engine cover. Reinstall screws and
■ Replace the chain brake on the post.
NOTE: If you notice a power loss with your gas powered
tool, a qualified service technician will need to remove
these deposits to restore performance.
CHECKING THE FUEL FILTER
See figure 65.
Check the fuel filter periodically. Replace it if contaminated
or damaged.
REPLACING THE SPARK PLUG
See figure 66.
This engine uses a Champion RCJ4 or RCJ6Y or NGK
BPMR7A with 0.63 mm (0.025 inch) electrode gap. Use
an exact replacement and replace every 50 hours or more
frequently, if necessary.
■ Remove the spark plug lead, by carefully rotating back
■ Loosen the spark plug by turning it counter clockwise
■ Remove the spark plug.
Hand thread the new spark plug, turning it clockwise.
Tighten securely with wrench.
NOTE: Be careful not to cross-thread the spark plug.
Cross-threading will seriously damage the engine.
■ Re-attach the spark plug lead by pressing firmly onto
CLEANING THE SPARK ARRESTING SILENCER
See figure 67.
The silencer is equipped with a spark arrester screen.
A faulty spark arrester screen can create a fire hazard.
Through normal use, the screen can become dirty and
36
on the ground.
in place.
contamination during cleaning.
secure.
secure.
NOTE: Check to ensure that the air filter is in the
proper position before reinstalling the engine cover
and forth whilst gently pulling upwards.
with a wrench.
the top of the spark plug.