ENGINE
CS-501SX, CS-501SXH
501sx
49
8-3 Inspecting muffl er and exhaust port
1. Remove cleaner lid, air fi lter and cylinder cover.
2. Remove muffl er with muffl er gasket.
3. Inspect cylinder exhaust port and clean the port
using wooden or plastic stick if carbon is found.
NOTE:
When cleaning exhaust port, always posi-
tion piston at Top Dead Center (TDC) to prevent
carbon from entering cylinder. Do not use metal
tool, and be careful not to scratch piston or cylin-
der.
NOTE:
Replace muffl er gasket with new one when
removing muffl er.
4. Remove exhaust guides (A) and spark arrestor
screen (B) from muffl er.
5. Remove carbon deposits from spark arrestor
screen and exhaust guides. If screen has heavy
deposits, replace with new one.
6. Reinstall spark arrestor screen and exhaust
guides to muffl er.
7. Reinstall muffl er with new muffl er gasket.
NOTE:
Before reinstalling muffler, apply 2-stroke
oil on muffl er gasket surface and temporarily paste
muffl er gasket (C) on cylinder as shown, in order
to avoid damage to muffl er gasket from wall (D) of
crankcase.
NOTE:
New bolts for bolt hole (E) and (F) are pre-
coated with sealant on the thread. If the sealant
is peeled off, apply thread locking sealant (Loctite
#242, ThreeBond #1324 or equivalent).
B
A
C
F
D
E
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