Service Spark Plug - Generac Power Systems 4240 PRO GAS PW 49ST EPA III Owner's Manual

Service Spark Plug

To service spark plug:
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. See Figure 4-10. Inspect electrode gap
with wire feeler gauge and replace spark
plug if gap (A) is not within specification
listed on Product Specifications Sheet.
A
Figure 4-10. Spark Plug
NOTE: Replace spark plug if electrodes are
pitted, burned or porcelain is cracked. Use
ONLY recommended replacement plug. See
Product Specifications Sheet.
4. Install spark plug finger tight, and tighten
an additional 3/8 to 1/2 turn using spark
plug wrench.
Inspect Engine Spark
WARNING
Accidental Start-up. Disconnect spark plug wire
when working on unit. Failure to do so could result
in death or serious injury.
1. Disconnect spark plug wire from spark
plug.
2. Secure spark plug wire where it cannot
contact spark plug.
3. Test spark plug with approved spark plug
tester.
NOTE: DO NOT inspect for spark with spark
plug removed.
Inspect Muffler And Spark Arrestor
NOTE: It is a violation of California Public
Resource Code, Section 4442, to use or
operate the engine on any forest-covered,
brush-covered, or grass-covered land unless
the exhaust system is equipped with a spark
arrestor, as defined in Section 4442, maintained
in effective working order. Other states or
federal jurisdictions may have similar laws.
NOTE: Call 1-888-GENERAC (1-888-436-
3722) with questions
replacement.
NOTE:
Use ONLY
replacement parts.
Owner's Manual for Power Washer
000134a
(000102)
about component
original equipment
Maintenance and Troubleshooting
Inspect muffler for cracks, corrosion, or other
damage. Remove spark arrestor, if equipped,
inspect for damage or carbon blockage. If
replacement parts are required.
Inspect Spark Arrestor Screen
(if equipped)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
1. See 4-11. Loosen fasteners (A) and
Figure
remove heat shield from muffler.
2. See Figure 4-12. Loosen fasteners (B) and
remove spark arrestor from muffler.
3. Inspect spark arrestor. Replace if torn, per-
forated or otherwise damaged.
4. If screen is not damaged, clean it with a
commercial solvent and replace.
A
Figure 4-11. Heat Shield Fasteners
B
Figure 4-12. Spark Arrestor Fasteners
(000108)
A
000135
000136
13