High Altitude Engine Operation; Troubleshooting - Ryobi RY64400 Manuel D'utilisation

 While holding a wrench on the flats of the adjusting
nut with one hand, loosen the retaining nut with a
second wrench as shown. 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 re-
tighten 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.
PREPARING FOR USE AFTER STORAGE
The following steps should be taken before using the cultiva-
tor after it has been stored.
PROBLEM
Engine fails to start.
Engine hard to start.
Engine lacks power.
Engine emits too much smoke
MAINTENANCE
 Unfold the handles into the upright position and secure by
 Pull the starter cord three or four times to clean lubricant
 Remove spark plug from the cylinder. Wipe lubricant from
 Reconnect spark plug wire.
 Follow the steps on pages 8-9 to refuel and restart the

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.

TROUBLESHOOTING

CAUSE
On/stop switch is in the off position.
No fuel in tank.
Spark plug shorted or fouled.
Spark plug is broken (cracked
porcelain or electrodes broken).
Ignition lead wire shorted, broken, or
disconnected from spark plug.
Ignition inoperative.
Water in gasoline or stale fuel mixture.
Obstructed fuel filter
Engine is under or over choked.
Weak spark at spark plug.
Air filter clogged.
Too much oil in crankcase.
13 - English
tightening handlebar knobs. Do not allow throttle cable
to become pinched when raising the handlebar.
from the combustion chamber.
the spark plug and return it to the cylinder.
cultivator.
Move switch to on.
Fill tank.
Replace spark plug.
Replace spark plug.
Replace lead wire or attach to spark
plug.
Contact authorized service center.
Drain entire system and refill with fresh
fuel.
Replace filter.
Adjust choke as necessary.
Contact authorized service center.
Clean or replace air filter.
Drain lubricant and refill with correct
amount of 20W-30 engine lubricant. See
Adding/Checking Engine Lubricant
in the Operation section of this manual.
REMEDY