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CS-352
EXHAUST PORT CLEANING
Level 2
Parts Required: As needed: Mufer gasket
1. Remove cylinder cover and remove spark plug lead.
2. Place piston at top dead center. Remove mufer (A) and mufer
gasket (B).
3. Use a wood or plastic scraping tool to clean deposits from cylin-
der 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 mufer gasket, and replace if damaged.
5. Install mufer gasket and mufer.
6. Tighten mufer mounting bolts (or nuts) to 60-80 in • lbf (70-90
kgf • cm).
7. Install cylinder cover and attach spark plug lead.
8. Start engine, and warm to operating temperature.
9. Stop engine, and re-tighten mounting bolts (or nuts) to speci-
cations.
A
B
SPARK ARRESTOR MUFFLER
• The spark arrestor mufer controls the exhaust
noise and prevents hot, glowing particles of
carbon from leaving the mufer.
• Make sure the spark arrestor screen is in good
repair and properly seated in the mufer.
• Certain internal combustion engines operated on
forest, brush, and/or grass-covered areas in the
states of Washington, Oregon, Idaho, California,
Minnesota, New Jersey and Maine, are required
to be equipped with a spark arrestor.
This requirement also applies to all U.S. Forest
Service lands. In some of these areas, the spark
arrestor system must be certied per USDA Forest
Service Regulation SAE J335.
Check with your local or state authorities for
specic regulations in your area. Failure to follow
these requirements is a violation of the law.
