Ryobi RYi900LP Manuel D'utilisation page 22

SPARK PLUG REPLACEMENT
See Figure 14 and 17.
The spark plug must be properly gapped and free of deposits
in order to ensure proper engine operation. To check:
 Use the included Torx screwdriver to remove the screw
securing the engine top cover. Remove cover and set
aside.
 Remove the spark plug cap.
 Clean any dirt from around base of spark plug.
 Remove spark plug using spark plug wrench.
 Inspect spark plug for damage, and clean with a wire
brush before reinstalling. If insulator is cracked or
chipped, spark plug should be replaced. For replacement
spark plug, see Product Specifications earlier in this
manual or the accompanying engine manual, if applicable.
 Measure plug gap. The correct gap is 0.024−0.028 in.
(0.60-0.70 mm). To widen gap, if necessary, carefully
bend the ground (top) electrode. To lessen gap, gently
tap ground electrode on a hard surface.
 Seat spark plug in position; thread in by hand to prevent
cross-threading.
 Tighten with wrench to compress washer. If spark plug
is new, use 1/2 turn to compress washer appropriate
amount. If reusing old spark plug, use 1/8 to 1/4 turn for
proper washer compression.
NOTE: An improperly tightened spark plug will become
very hot and could damage the engine.
NOTICE:
Be careful not to cross-thread the spark plug. Cross-
threading will seriously damage the product.
 Reinstall the spark plug cap.
 Replace engine top cover and reinstall screw.
CLEANING THE EXHAUST PORT AND
MUFFLER
Depending on the type of fuel used, the type and amount of
lubricant used, and/or your operating conditions, the exhaust
port and muffler may become blocked with carbon deposits.
If you notice a power loss with your gas-powered products,
you may need to remove these deposits to restore perfor-
mance. We highly recommend that only qualified service
technicians perform this service.
MAINTENANCE
SPARK ARRESTOR
See Figure 18.
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 appropriate authorities. Contact customer
service or a qualified service center to purchase a
replacement spark arrestor.
The spark arrestor must be cleaned or replaced every 50
hours or yearly to ensure proper performance of your prod-
uct. Spark arrestors may be in different locations depending
on the model purchased. Contact customer service or a
qualified service center for the location of the spark arrestor
for your model.
To clean the spark arrestor:
 Loosen the screws on the rear panel. Remove rear panel
and set aside.
 Remove the screw securing the spark arrestor in place.
 Remove the spark arrestor and gently clean using a wire
brush.
 Replace the spark arrestor and rear panel. Ensure that
all screws are tightened securely.
TRANSPORTING
 Make sure engine and exhaust of unit is cool and the
1 lb. cylinder is removed or the 20 lb. cylinder has been
disconnected.
 Do not drop or strike unit or place under heavy objects.
 If transporting in a vehicle, securely restrain the generator.
 Provide a plastic sheet or absorbent pad below the gen-
erator to catch any drips of lubricant.
18 — English