Maintenance – Ryobi RY09440 User Manual
Page 15
11 - English
MAINTENANCE
Disconnect the spark plug wire.
Remove the oil fill cap/dipstick.
Tip blower on its side and allow lubricant to drain from
the oil fill hole into an approved container.
NOTE:
Drain the lubricant while the engine is still warm
but not hot. Warm lubricant will drain quickly and more
completely.
Return the blower to an upright position and refill with
lubricant following the instructions in the
Adding/
Checking Engine Lubricant section previously in this
manual.
Reinstall the bottom engine cover. Replace the screws
and tighten securely.
Replace the screw in the top engine cover and tighten
securely.
NOTE:Used lubricant should be disposed of at an approved
disposal site. See your local retailer for more information.
ADJUSTING CAMSHAFT-TO-ROCKER ARM
CLEARANCE
See Figures 14 - 15.
Inspect the camshaft-to-rocker arm clearance after every
25 hours of operation. This should be done in a clean, dust-
free environment.
NOTE: This procedure requires partial disassembly of the
engine. If you are unsure if you are qualified to perform this
operation, take the unit to an authorized service center.
Stop the engine. Allow the engine to cool completely
before proceeding.
Remove screws from the engine cover. Remove engine
cover and set aside.
Disconnect the spark plug wire.
Using a Torx screwdriver, remove the screw from the
rocker arm cover. Remove the cover and set aside.
Position camshaft by pulling the recoil starter grip just
until the deep hole in the camshaft gear is located at the
6 o’clock position.
Place the feeler gauge under each rocker arm and
measure the gap. The gap should be between .006 in.
(0.15 mm) and .008 in. (0.20 mm) for both rocker arms.
NOTE:
Use a standard automotive feeler gauge. The
.006 in. (0.15 mm) feeler gauge should slide between
the rocker arm and valve stem with a slight amount of
resistance but without binding. The 0.008 in. (0.20 mm)
feeler gage should not slide between the rocker arms and
the cam lobes — it should be held tight.
If the valve clearance is not between .006 in. (0.15 mm)
and .008 in. (0.20 mm), the clearance should be adjusted
as follows:
While holding a wrench on the flats of the adjusting
nut with one hand, loosen the retaining nut with a
second wrench. Take care not to loosen the stud.
Rotate the adjusting nut until it touches the feeler
gauge. Once the gap setting is correct, hold the
wrench on the flats of the adjusting nut and retighten
the retaining nut securely.
Adjust the second rocker arm, if necessary.
Replace the rocker arm cover and screw; tighten
securely.
Replace the top engine cover and screw; tighten
securely.
WARNING:
Ensure all engine cover and all engine parts are com-
pletely and properly reassembled before starting engine.
Failure to correctly reassemble engine may result in seri-
ous injury or property damage.
STORING THE PRODUCT
Clean all foreign material from the product. Store idle unit
indoors in a dry, well-ventilated area that is inaccessible
to children. Keep away from corrosive agents such as
garden chemicals and de-icing salts.
Abide by all ISO and local regulations for the safe storage
and handling of gasoline.
When storing 1 month or longer:
Drain all fuel from tank into a container approved for
gasoline. Run engine until it stops.
HIGH ALTITUDE ENGINE OPERATION
Please have an authorized service center adjust this engine
if it is to be run above 2000 feet. Failure to do so may result
in poor engine performance, spark plug fouling, hard start-
ing, and increased emissions. Carburetor adjustment by
an authorized service center will improve performance and
allow that this engine meets EPA (Environmental Protection
Agency) and California ARB (Air Resources Board) emis-
sion standards. An engine adjusted for high altitudes can
not be run at 2000 feet or lower. In doing so, the engine will
overheat and cause serious engine damage. Please have
an authorized service center restore high altitude modified
engines to the original factory specification before operating
below 2000 feet.