Pro Attachment SeriesTM 23
Operator's Manual
exhaust system
Spark Arrestor Screen
Level 2.
Parts Required: Spark Arrestor Screen, Gasket
1.Remove engine cover (B).
2.Place piston at Top Dead Center (TDC) to prevent carbon/dirt from entering cylinder.
3.Remove spark arrestor screen cover (C,D), gasket (E), and screen
(F), from muffler body.
4.Clean carbon deposits from muffler components.
NOTE
When cleaning carbon deposit, be careful not to damage the cata- lytic element inside muffler.
5.Replace screen if it is cracked, plugged, or has holes burned through.
6.Assemble components in reverse order.
F
E
D 
C
Exhaust Port Cleaning
Level 2.
Parts Required: As needed: Heat Shield
1.Remove spark plug lead from spark plug, and remove engine cover.
2.Place piston at top dead center. Remove muffler (A) and heat shield
(B).
3.Use a wood or plastic scraping tool to clean deposits from cylinder exhaust port.
IMPORTANT
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.
4.Inspect heat shield, and replace if damaged.
5.Install heat shield and muffler.
6.Tighten muffler mounting bolts (or nuts) to
7.Install engine cover and attach spark plug lead.
8.Start engine, and warm to operating temperature.
9.Stop engine, and
BA
