Maintenance - Ryobi RY08420A Operator's Manual

WARNING:
Do not place blower on top of or near loose debris. Debris
can be sucked into blower intake vent resulting in serious
personal injury and possible damage to the unit.
Normal maintenance, replacement or repair of emission
control devices and systems may be performed by any
qualified repair establishment or individual with original
or equivalent parts. Warranty and recall repairs must be
performed by an authorized service center; please contact
customer service for assistance.
WARNING:
Before inspecting, cleaning, or servicing the machine,
shut off engine, wait for all moving parts to stop, and
disconnect spark plug wire and move it away from spark
plug. Failure to follow these instructions can result in
serious personal injury or property damage.
WARNING:
Always wear eye protection with side shields marked to
comply with ANSI Z87.1, along with hearing protection.
Failure to do so could result in objects being thrown into
your eyes and other possible serious injuries.
WARNING:
When servicing, use only recommended or equivalent
replacement parts. Use of any other parts could create
a hazard or cause product damage.
NOTICE:
Periodically inspect the entire product for damaged,
missing, or loose parts such as screws, nuts, bolts, caps,
etc. Tighten securely all fasteners and caps and do not
operate this product until all missing or damaged parts are
replaced. Please contact customer service or a qualified
service center for assistance.
OPERATION
CRUISE CONTROL
See Figure 12.
The cruise control can be used to operate the blower without
holding the throttle trigger.
To engage the cruise control:
 Push cruise control lever down and stop at the desired
throttle setting.
 To release the cruise control, pull cruise control lever all
the way up.

MAINTENANCE

GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use.
Use clean cloths to remove dirt, dust, lubricant, grease, etc.
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating lubricants, etc., come in con-
tact with plastic parts. Chemicals can damage, weaken or
destroy plastic which can result in serious personal injury.
SPARK PLUG
This engine uses a Champion RCJ4 or equivalent spark plug
with .025 in. electrode gap. Use a recommended or equiva-
lent replacement and replace annually, or more frequently
if necessary.
NOTICE:
Be careful not to cross-thread the spark plug. Cross-
threading will seriously damage the product.
CLEANING THE EXHAUST PORT
NOTICE:
The spark arrestor on this product has not been evaluated by
the USDA Forest Service and cannot be used on U.S. forest
lands. In addition, product users must comply with Federal,
State, and local fire prevention regulations. Check with ap-
propriate authorities. Contact customer service or a qualified
service center to purchase a replacement spark arrestor.
NOTE: Depending on the type of fuel used, the type and
amount of lubricant used, and/or your operating conditions, the
exhaust port, muffler, and/or spark arrestor screen may be-
come blocked with carbon deposits. If you notice a power
loss with your gas powered tool, you may need to remove
these deposits to restore performance. We highly recommend
that only qualified service technicians perform this service.
10 — English
WARNING: