Briggs & Stratton PowerBoss Operator's Manual page 17

2. Remove top maintenance cover.
3. Clean area around spark plug and remove spark plug
boot.
4. Remove spark plug and inspect spark plug.
5. Check electrode gap with wire feeler gauge and reset
spark plug gap to recommended gap if necessary (see
Specifications).
6. Replace spark plug if electrodes are pitted, burned or
porcelain is cracked. Use the recommended
replacement plug. See Specifications.
7. Install spark plug and tighten firmly. Reinstall spark
plug boot.
8. Reinstall top maintenance cover.
9. Reinstall handle and tighten the four handle screws.
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 Contact with muffler area can result in
serious burns.
Exhaust heat/gases can ignite
combustibles, structures or damage
fuel tank causing a fire.
• DO NOT touch hot parts and AVOID hot exhaust gases.
• Allow equipment to cool before touching.
• Keep at least 5 feet (152 cm) of clearance on all sides of
generator including overhead.
• 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 inspect the spark arrester as follows:
1. To remove muffler guard, remove four screws that
connects guard to generator.
2. Remove screw that attaches spark arrester screen to
muffler. Remove spark arrester screen.
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
a brush.
4. Reattach screen to muffler. Reattach muffler guard.
Check Valve Clearance
Regular valve clearance check and adjustment will improve
performance and extend engine life. This procedure cannot
be done without partial engine disassembly and the use of
special tools. For this reason we recommend that you have
an authorized Service Dealer check and adjust valve
clearance at recommended intervals (see Maintenance
Schedule in the Maintenance section).
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