Briggs & Stratton PRO400 Operator's Manual page 20

4. Replace spark plug if electrodes are pitted, burned or
porcelain is cracked. Usethe recommended
replacementspark plug. See Specifications.
5. Install spark plug and tighten firmly.
InspectMluffler 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.
_i, WARNING Contact with muffler area can result in
serious burns.
Exhaust heat/gases can ignite
combustibles, structures or damage
fuel tank causing a fire.
• DO NOTtouch hot parts and AVOID hot exhaust gases.
• Allow equipment to cool before touching.
• Keepat least 5 feet (152 cm) of clearanceon all sides of
generator 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.
Clean and inspectthe spark arrester as follows:
1. To remove muffler heat shield (A) from muffler (B),
remove four screws that connect guard to muffler
bracket.
Clean CoolingSystem
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 Briggs & Stratton
authorized dealer clean the cooling system (D) per
recommended intervals (see Maintenance Schedule in the
Maintenance section). Equally important is to keeptop of
engine free from debris. Also see Cleaning.
'\
CarburetorAdjustment
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 a Briggs &
Stratton authorized dealer.
_i, CAUTION Excessively high operating speeds increase
risk of injury and damage to generator.
Excessively low speeds impose a heavy load.
• DO NOTtamper with governed speed. Generator supplies
correct rated frequency and voltage when running at governed
speed.
• DO NOTmodify generator in any way.
.
3.
Removefour screws that attachspark arrester screen (C).
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.
20 BRIGGSandSTRATTON.COIVl