Honda GX270 Owner's Manual page 12

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SEDIMENT CUP
Cleaning
Gasoline is highly flammable and explosive, and you
can be burned or seriously injured when handling fuel.
• Stop the engine and keep heat, sparks, and flame
away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
1. Move the fuel valve lever to the OFF position, then remove the
sediment cup and O-ring.
2. Wash the sediment cup in non-flammable solvent, and dry it
thoroughly.
FUEL VALVE LEVER
OFF
3. Place a new O-ring in the fuel valve, and install the sediment
cup. Tighten the sediment cup securely.
4. Move the fuel valve lever to the ON position, and check for
leaks.
12
SPARK PLUG
Recommended Spark Plug:
The recommended spark plug has the correct heat range for normal
engine operating temperatures.
An incorrect spark plug can cause engine damage.
If the engine has been running, let it cool before servicing the spark
plug.
For good performance, the spark plug must be properly gapped and
free of deposits.
1. Disconnect the spark plug
cap, and remove any dirt from
around the spark plug area.
2. Remove the spark plug with a
21 mm spark plug wrench.
3. Visually inspect the spark
plug. Replace it if damaged or
badly fouled, if the sealing
washer is in poor condition, or
if the electrode is worn.
O-RING 4. Measure the spark plug
(Replace)
electrode gap with a wire-type
feeler gauge. Correct the gap,
if necessary, by carefully
bending the side electrode.
The gap should be:
SEDIMENT CUP
0.7–0.8 mm
5. Install the spark plug carefully
by hand, to avoid
cross-threading.
6. After the spark plug is seated, tighten with a 21 mm spark plug
wrench to compress the sealing washer.
When installing a new spark plug, tighten 1/2 turn after the
spark plug seats to compress the washer.
When reinstalling the original spark plug, tighten 1/8–1/4 turn
after the spark plug seats to compress the washer.
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the
cylinder head.
7. Attach the spark plug cap to the spark plug.
ENGLISH
BPR6ES (NGK)
W20EPR-U (DENSO)
SPARK PLUG WRENCH
SPARK PLUG CAP
SIDE ELECTRODE
0.7–0.8 mm
SEALING
WASHER