Briggs & Stratton PowerSmart P3400 Operator's Manual page 13

Service Air Cleaner
WARNING! Fuel and its vapors are extremely
flammable which could cause burns or fire
resulting in death or serious injury.
• Do not start and run engine with air filter removed.
Your engine will not run properly and may be damaged
if you run it with a dirty air cleaner. Service more often if
operating under dirty or dusty conditions.
1. Loosen the side maintenance cover screws and
remove the side maintenance cover.
2. Loosen air cleaner cover screw (A) and remove air
cleaner cover (B).
3. Carefully remove foam air cleaner (C) by pulling it out
towards you.
4. Carefully remove pre-filter (D) by pulling it out towards
you.
5. Wash foam air cleaner and breather filter in liquid
detergent and water only. Squeeze dry in a clean
cloth.
6. SATURATE foam air cleaner in clean engine oil and
squeeze in a clean cloth to remove excess oil.
7. Reinstall clean or new foam air cleaner inside base.
8. Reinstall clean or new breather filter inside base.
9. Reinstall the air cleaner cover and tighten screw.
10. Reinstall the side maintenance cover and hand tighten
the cover screws.
Service Spark Plug
Changing the spark plug will help your engine to start
easier and run better.
1. Push in on tab with screwdriver and remove top
maintenance cover.
2. Clean area around spark plug and remove spark plug
boot.
C
B
A
Remove spark plug and inspect spark plug.
D
4. Replace spark plug if electrodes are pitted, burned
or porcelain is cracked. Use the recommended
replacement spark plug. See Common Service Parts.
5. Check electrode gap with wire feeler gauge and reset
spark plug gap to recommended gap if necessary
(see Specifications).
6. Install spark plug and tighten firmly. Reinstall spark
plug boot.
7. Reinstall top maintenance cover.
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Maintenance
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