Spark Plug Service
To ensure proper engine operation, spark plug must be
properly gapped and free of deposits.
WARNING
If engine has been running, spark plug will reach
temperatures that could cause severe burns. Do
not touch.
Recommended Spark Plug Replacement: 102557A
AutoLite
Bosch
Champion
Denso
NGK
TABLE 4. Spark Plug Equivalents to 102557A
To service spark plug, you will need:
Clean cloth
13/16" spark plug socket wrench
New spark plug (if existing spark plug is exces-
sively worn or damaged)
Wire brush
Spark plug gauge (for setting spark plug gap)
Stop engine if it is running. Allow to completely cool.
1.
2.
Place the generator on a flat, level surface.
Remove spark plug cap.
3.
FIGURE 40: Spark Plug Cap Removal
Clean any dirt from around spark plug base.
4.
*
See Maintenance Parts at end of this manual.
HW3000/HW3000L Portable Electrical Generator Owner's Manual
62
WR5DC
RN6YC
W22EPR-U
BPR7ES
Using a 13/16" spark plug socket wrench, loosen and
5.
remove the spark plug.
*
FIGURE 41: Spark Plug Removal
Inspect the spark plug.
6.
If spark plug is damaged or excessively worn, or if
insulator is cracked or chipped, use a new spark
plug.
If spark plug is in good condition, clean spark plug
with wire brush and reuse.
Measure spark plug gap with spark plug gauge.
7.
Gap should be: (0.028-0.031 in) (0.70-0.80 mm).
FIGURE 42: Correct Spark Plug Gap
If necessary, adjust gap by carefully bending side
8.
electrode.
Inspect spark plug washer and verify it is in good con-
9.
dition.
Reinstall spark plug by hand to prevent cross-thread-
10.
ing.
After spark plug is seated, tighten with spark plug
11.
wrench to compress washer.
If installing a new spark plug, tighten 1/2 turn after
the spark plug seats to compress the washer.
If reinstalling a used spark plug, tighten 1/8 - 1/4
turn after the spark plug seats to compress the
washer.
Spark plug must be securely tightened. An improperly tight-
ened spark plug can become very hot and could damage
engine. Never use spark plugs that have an improper heat
range. Use only recommended spark plugs or equivalent.
Reinstall spark plug cap.
12.
Spark Plug Service
0.028-0.031 in
(0.70-0.80 mm)
NOTICE
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