Storing The Product; High Altitude Engine Operation - Ryobi RY34007 Manuel D'utilisation

CHANGING ENGINE LUBRICANT
See Figure 12.
WARNING:
Do not change engine lubricant while it is hot. Accidental
contact with hot engine lubricant could result in serious
burns.
For best performance, engine lubricant should be changed
after every 25 hours of operation.
To change the engine lubricant:
 Stop the engine and disconnect the spark plug wire. Allow
the engine to cool completely before proceeding.
 Remove the screw from the top engine cover and set
aside.
 Remove the screws from the bottom of the engine cover.
Remove the bottom cover and set aside.
 Remove the oil fill cap/dipstick.
 Tip power head 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 power head 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 13 - 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 a qualified service center.
 Stop the engine and disconnect the spark plug wire. Allow
the engine to cool completely before proceeding.
 Remove the screw from the top engine cover. Remove
engine cover and set aside.
 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 and rope
just until the deep hole in the camshaft gear is located at
the 6 o'clock position as shown in figure 13.
MAINTENANCE
 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 as shown in figure 15. 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 can 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

Your engine is configured for operation below 2000 feet
altitude at the factory. Your engine must be reconfigured for
operation above 2000 feet altitude. Operating the engine
with the wrong engine configuration at a given altitude may
increase its emissions, decrease fuel efficiency, degrade per-
formance and cause irreversible damage. Engines configured
for high altitude operation cannot be operated in standard
altitude conditions. A qualified service center should ensure
that your engine is properly configured for your location.
11 — English