Product Manual

3-6
REPLACING THE SPARK PLUG
Refer to Table 3-1 for scheduled spark plug replace-
ment. (The genset has one spark plug, Figure 3-4.)
The spark plug must be in good condition for proper
engine starting and performance. A spark plug that
fouls frequently or has heavy soot deposits indi-
cates the need for engine service. See Trouble-
shooting (Page 4-1).
Always thread the spark plug in by hand until it
seats, to prevent cross threading, and torque to
13 lbs-ft (17 N-m). If you don’t have a torque
wrench, turn the spark plug an additional 1/4 turn, if
being reused, or 3/8 to 1/2 turns if new.
CLEANING THE SPARK ARRESTOR
Refer to Table 3-1 for scheduled cleaning of the
spark arrestor muffler (which meets U.S. Forest
Service requirements). Cleaning is required for
maximum genset performance.
WARNING
A hot muffler can cause severe
burns. Let the muffler cool down before remov-
ing or installing the cleanout plugs.
The muffler is mounted inside the genset housing.
The cleanout plugs are located on the bottom side of
the muffler, accessible through the air outlet open-
ing in the bottom of the genset. Clean out the spark
arrestor muffler as follows:
1. Remove the cleanout plugs from the bottom of
the muffler (Figure 3-5).
2. Restart the genset and load it nearly to full pow-
er. Let the genset run for about five minutes to
expel the soot in the muffler.
3. Stop the genset, allow the muffler to cool down
and then reinstall the plugs.
GAP
FIGURE 3-4. SPARK PLUG
CLEANOUT PLUGS
FIGURE 3-5. SPARK ARRESTOR CLEANOUT
PLUGS
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