RIDGID RD6800 Series Operator's Manual page 16

MAINTENANCE
 Inspect spark plug for damage, and clean with a wire
brush before reinstalling. If insulator is cracked or
chipped, spark plug should be replaced.
NOTE: If replacing, use the following recommended spark
plugs or equivalent: NGK BPR4ES.
 Measure plug gap. The correct gap is 0.028−0.031 in.
(0.7-0.8 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.
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.
SPARK ARRESTOR
See Figure 23.
 Inspect the spark arrestor for breaks or holes. Replace
if necessary. To purchase a replacement spark arrestor
contact RIDGID customer service at 1-866-539-1710.
 Use a brush to remove carbon deposits from the spark
arrestor screen as needed.
DRAINING FUEL TANK/CARBURETOR
See Figures 24 - 25.
To help prevent gum deposits in the fuel system, drain the
fuel from the tank and carburetor before storing.
DRAINING THE FUEL TANK
 Turn the engine OFF ( O ).
 Turn the fuel valve to the OFF position.
 Remove the fuel line from the petcock by squeezing the
ends of the retaining clip and sliding the fuel line off.
 Install one end of a drain line over the petcock, and place
the other end in a fuel container large enough to catch
the fuel being drained from the tank.
 Turn the fuel valve to the ON position.
 For better fuel drainage, please tilt the unit toward the
fuel petcock slightly (approximately 1 in.).
 When the fuel has drained from the tank, close the fuel
valve and reinstall fuel line securely on petcock.
DRAINING THE CARBURETOR
 Turn the engine OFF ( O ).
 Turn the fuel valve to the OFF position.
 Position a suitable container under the carburetor drain
screw to catch fuel; loosen the screw.
 Allow fuel to drain completely into container.
 Retighten drain screw.
NOTE: Consult hazardous waste management guidelines in
your area for the proper way to dispose of used fuel.
TRANSPORTING
See Figure 26.
 Turn the engine OFF ( O ).
 Turn the fuel valve to the OFF position.
 Make sure engine and exhaust of unit is cool.
 For security, insert the pin to secure the handle before
transporting.
 Keep unit level while transporting to prevent fuel spill-
age.
 Do not drop or strike unit or place under heavy objects.
16 — English