Ryobi RY64400 - Manual (Page 15)

11 - English
MAINTENANCE
WARNING:
When servicing, use only identical replacement parts. Use
of any other parts may create a hazard or cause product
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:
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.
GENERAL MAINTENANCE
Before each use, 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 call 1-800-860-4050 or contact an authorized service
center for assistance.
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.
WARNING:
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 may result in serious personal injury.
Only the parts shown on the parts list are intended to be repaired
or replaced by the customer. All other parts should be replaced
at an Authorized Service Center.
CLEANING THE AIR FILTER
See Figure 18.
Clean the air filter as indicated by the maintenance schedule.
To clean the air filter:

Depress the latch located below the air filter cover. Then,
lift the cover away from the locking tabs and remove it from
the unit.
 Remove the air filter.
 Rinse filter with clean water.
 Gently squeeze filter until excess water is removed.
 Apply a light coat of engine lubricant to the filter, then squeeze
it out.
 Reinstall the air filter.
NOTE: Make sure the filter is seated properly inside the
cover. Installing the filter incorrectly will allow dirt to enter
the engine, causing rapid engine wear.
 Reinstall the air filter cover making sure that the locking tabs
on the unit and the holes in the air filter cover are aligned.
 To secure, press against the air filter cover until the latch
below the cover snaps in place.
NOTE: For best performance, the air filter should be replaced
once each year.
FUEL CAP
WARNING:
Check for fuel leaks. A leaking fuel cap is a fire hazard
and must be replaced with an original manufacturer’s
replacement cap immediately. If you find any leaks, correct
the problem before using the product. Failure to do so could
result in a fire that could cause serous personal injury.
The fuel cap contains a non-serviceable filter and a check
valve. A clogged fuel filter will cause poor engine performance.
If performance improves when the fuel cap is loosened, check
valve may be faulty or filter clogged. Replace fuel cap if required.
REPLACING THE SPARK PLUG
See Figure 19.
This engine uses a Champion RY4C spark plug with .025 in. elec-
trode gap. Use an exact replacement and replace annually.

Remove the screw on top of the engine housing. This will
allow the engine housing to uncover as shown in figure 18.
 Remove the spark plug wire.
 Loosen the spark plug by turning it counterclockwise with
a socket.
 Remove the spark plug.
 Hand thread the new spark plug, turning it clockwise.
 Tighten with a socket and torque to 170 in. lb. minimum,
190 in. lb. maximum. Do not overtighten.
 Secure the engine housing back into place and return the
screw. Ensure that the housing is stable.
CAUTION:
Be careful not to cross thread the spark plug. Cross thread-
ing will seriously damage the product.
REPLACING THE SPARK ARRESTOR
The spark arrestor must be cleaned or replaced every 50
hours or yearly to ensure proper performance of your product.
Spark arrestors may be in different locations depending on
the model purchased. Please contact your nearest service
dealer for the location of the spark arrestor for your model.