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20 | Westinghouse Portable Power
SPARK PLUG MAINTENANCE
The spark plug must be checked and cleaned after ev-
ery 100 hours of use or 6 months and must be replaced
after 300 hours of use or every year.
1. Stop the inverter and let it cool for several minutes
if running.
2. Remove the spark plug boot by firmly pulling the
plastic spark plug boot handle directly away from
the engine.
NOTICE
Never apply any side load or move the spark plug
laterally when removing the spark plug. Applying a
side load or moving the spark plug laterally may crack
and damage the spark plug boot.
3. Clean area around the spark plug.
4. Using the spark plug socket wrench provided,
remove the spark plug from the cylinder head.
5. Place a clean rag over the opening created by the
removal of the spark plug to make sure no dirt can
get into the combustion chamber.
6. Inspect the spark plug for:
• Cracked or chipped insulator
• Excessive wear
• Spark plug gap (the acceptable
limit of 0.027–0.032 in.
[0.70 – 0.80 mm]).
7. If the spark plug fails any one of the
conditions listed above, replace the plug.
NOTICE
Only use the recommended spark plug. See chart
below. Using a non- recommended spark plug could
result in damage to the engine.
MAINTENANCE
7. Install the spark plug by carefully following the
steps outlined below:
a. Carefully insert the spark plug back into the
cylinder head. Hand-thread the spark plug until
it bottoms out.
b. Using the spark plug socket wrench provided,
turn the spark plug to ensure it is fully seated.
c. Replace the spark plug boot, making sure the
boot fully engages the spark plug’s tip.
Recommended Spark Plug Replacement:
AC Delco: 4EXLS
Autolite: 52
Champion: N9YC
Bosch: W7DC
Torch: F7TC
CLEANING THE SPARK ARRESTOR
Check and clean the spark arrestor after every 100
hours of use or 6 months.
1. Stop the inverter and let it cool for several minutes
if running.
2. Move the inverter to a flat, level surface.
3. Remove the screws holding the muffler cover as
well as the screws holding the inverter cover (see
Figure 21).
4. Once the screws are removed and the inverter
cover is off, slide the muffler cover to the right and
pull out to remove.
5. Loosen the clamp holding the spark arrestor onto
the muffler (see Figure 22).
SPARK PLUG GAP
Figure 21: Remove screws holding muffler and inverter cover
Figure 19 - Remove spark plug boot
Inverter
Cover