2
1. Unscrew the wing knob.
2. Remove the air filter cover.
3. Remove the wing nut.
4. Lift the old air filter away and replace
with the new filter.
5. Replace the wing nut.
6. Replace the air filter cover.
7. Replace the wing knob.
R E P L A C E A I R F I L T E R
NOTE: The spark plug is easier to
change with the air filter cover and base
removed. The wrench can be found in
the canister or holder that contains the
RB4000 Operator’s Manual.
1. Pull off the spark plug cap.
2. Use the wrench to unscrew the spark
plug.
3. Install the spark plug carefully, by hand,
to avoid cross-threading.
4. Tighten with the spark plug wrench to
compress the sealing washer until it sets.
5. Tighten the new spark plug ½ turn after
the spark plug seats.
6. Push the cap back on.
7. Replace the air filter cover and base.
R E P L A C E S P A R K P L U G
Spark Plug
Air Filter
Summary of Contents for RB4000
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