Briggs & Stratton 030430, Service And Repair Manual

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Air Filter Maintenance
A correctly serviced air fi lter protects internal engine parts
from airborne dirt and dust. Poor fi lter maintenance will allow
dirt and dust to be drawn into the engine, causing wear to
the intake system and contamination of the oil. Dirt in the oil
forms an abrasive mixture which wears down moving parts.
NOTE: Do not use pressurized air or solvents to clean the
fi lter. Pressurized air can damage the fi lter and solvents will
dissolve the fi lter.
1. Loosen screws ( A , Figure 16) and remove air cleaner
cover ( B ).
2. Carefully remove cartridge ( C ) from base ( D ).
3. Install clean (or new) air cleaner assembly inside cover.
Dispose of old filter properly.
4. Assemble air cleaner cover onto base and tighten
screws.
Figure 16
Spark Plug Maintenance
Spark plugs should be replaced every year.
NOTICE: Spark plugs have different thread “reach” and heat
ranges. When changing a spark plug, use only the specifi ed
replacement, otherwise engine damage could occur.
NOTE: In some areas, local law requires using resistor spark
plugs to suppress radio frequency interference.
1. Disconnect spark plug wire.
2. Remove and inspect spark plug for wear and damage.
Replace spark plug if electrodes are burned away, or
the porcelain is cracked.
3. Do not blast clean spark plugs. Clean by scraping
or wire brushing, and then washing in a commercial
solvent.
4. Using a wire gage, check and set the gap ( A , Figure
17). See Engine Specifications .
5. Re-install spark plug and torque to values listed in
Specifications.
6. Connect spark plug wire.
Figure 17