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Exhaust System
Spark Arrestor Screen
Level 2.
Parts Required: Spark Arrestor Screen, Gasket
1.Remove spark plug lead.
2.Remove muffler cover.
3.Place piston at Top Dead Center (TDC) to prevent carbon/dirt from entering cylinder.
4.Remove exhaust guide (A), gasket (B), and screen (C) from muffler body.
5.Clean carbon deposits from muffler components.
Note: When cleaning carbon deposits, be careful not to damage the catalytic element inside muffler.
6.Replace screen if it is cracked, plugged, or has holes burned through.
7.Assemble components in reverse order.
Exhaust Port Cleaning
Level 2.
Parts Required: As needed: Heat Shield
1.Remove spark plug lead from spark plug, and remove muffler cover.
2.Place piston at top dead center. Remove muffler(A), heat shield (B), and eyeplate (C).
3.Use a wood or plastic scraping tool to clean deposits from cylinder exhaust port.
C
B
A
AC
B 
Never use a metal tool to scrape carbon from the exhaust port. Do not scratch the cylinder or piston when cleaning the exhaust port. Do not allow carbon particles to enter the cylinder.
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