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HW4000/HW4000L Portable Electrical Generator Owner’s Manual www.honeywellgenerators.com 23
Cleaning Fuel Sediment Cup
Cleaning Fuel Sediment Cup
The sediment cup helps prevent fuel tank residue from
entering the carburetor.
Clean fuel sediment cup at the intervals specified in
Table 2.
To clean fuel sediment cup:
1. Stop engine if it is running. Allow to completely cool.
2. Place the generator on a flat, level surface.
3. Turn fuel valve to OFF position.
4. While holding the fitting above the fuel valve with a 22
mm open end wrench, remove the fuel sediment cup
assembly (sediment cup, o-ring, and fuel screen)
using a 10 mm box wrench.
5. Clean fuel screen (A), o-ring (B), and sediment cup
(C), with soap and water.
6. Wipe pieces clean with clean, dry cloth.
7. Reinstall sediment cup, o-ring, and fuel filter.
8. Turn fuel valve to ON position and check for leaks.
Spark Plug Service
To ensure proper engine operation, spark plug must be
properly gapped and free of deposits.
Recommended Spark Plug Replacement: 100842A
*
1. Stop engine if it is running. Allow to completely cool.
2. Place the generator on a flat, level surface.
3. Remove spark plug cap.
4. Clean any dirt from around spark plug base.
5. Using a 13/16” spark plug socket wrench, loosen and
remove spark plug.
To clean fuel sediment cup, you will need:
10 mm box wrench
22 mm open end wrench
Household soap and water
Clean, dry cloth
FIGURE 44: Fuel Sediment Cup Assembly Removal
FIGURE 45: Fuel Sediment Cup Assembly Pieces
A
B
C
If engine has been running, muffler will reach tem-
peratures that could cause severe burns. Do not
touch.
Bosch W20EPR
Champion RN9YC
Denso WR7DC
TABLE 4. Spark Plug Equivalents to 100842A
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)
* See Maintenance Parts at end of this manual.
FIGURE 46: Spark Plug Cap Removal
FIGURE 47: Spark Plug Removal
WARNING