Service Spark Plug
Changing the spark plug will help your engine to start
easier and run better.
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. Replace spark plug if electrodes are pitted,
burned or porcelain is cracked. Use the
recommended replacement plug. See
Specifications.
4. Check electrode gap with wire feeler gauge and
reset spark plug gap to recommended gap if
necessary (see Specifications).
5. Install spark plug and tighten firmly.
Inspect Muffler and Spark Arrester
Inspect the muffler for cracks, corrosion, or other
damage. Remove the spark arrester, if equipped, and
inspect for damage or carbon blockage. If replacement
parts are required, make sure to use only original
equipment replacement parts.
WARNING Exhaust heat/gases could ignite
combustibles, structures or damage
fuel tank causing a fire, resulting in
death or serious injury.
Contact with muffler area could cause burns
resulting in serious injury.
• DO NOT touch hot parts and AVOID hot exhaust gases.
• Allow equipment to cool before touching.
• Keep at least 5 ft. (1.5 m) of clearance on all sides of
pressure washer including overhead.
• 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 arrester, as
defined in Section 4442, maintained in effective working
order. Other states or federal jurisdictions may have
similar laws.
Contact the original equipment manufacturer, retailer,
or dealer to obtain a spark arrester designed for the
exhaust system installed on this engine.
• Replacement parts must be the same and installed in the
same position as the original parts.
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Clean and inspect the spark arrester as follows:
1. To remove muffler heat shield (A) from
muffler (B), remove four screws that connect
guard to muffler bracket.
B
2. Remove four screws that attach spark arrester
screen (C).
3. Inspect screen and obtain a replacement if torn,
perforated or otherwise damaged. DO NOT use a
defective screen. If screen is not damaged, clean
it with commercial solvent.
4. Reattach screen and muffler guard.
Air Cooling System
Over time debris may accumulate in cylinder cooling
fins and cannot be observed without partial engine
disassembly. For this reason, we recommend you have
a qualified service dealer clean the cooling system per
recommended intervals (see Maintenance Schedule in
beginning of Maintenance section). Equally important
is to keep top of engine free from debris. See Clean
Debris.
Carburetor Adjustment
The carburetor on this engine is low emission. It is
equipped with a non-adjustable idle mixture valve.
Top speed has been set at the factory. If adjustment is
required, see an authorized service dealer.
CAUTION Excessively high operating speeds
could result in minor injury.
Excessively low speeds impose a heavy load.
• DO NOT tamper with governor spring, links or other parts to
increase engine speed. Pressure washer supplies correct
rated pressure and flow when running at governed speed.
• DO NOT modify pressure washer in any way.
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