ENGINE
CSG-7410ES
EC741S
46
7-1 Cleaning cooling air passages
1. Inspect cylinder cooling fins (A) for blockage
with dirt. Clean them with wooden or plastic stick
or compressed air.
WARNING DANGER
Always wear eye protection when using
compressed air for cleaning. Otherwise,
eye damage can occur from flying particles.
2. If blockage with dirt is heavy, remove cylinder
cover assembly (B) and remove dust.
7-2 Inspecting muffler and exhaust port
NOTE:
Carbon deposits accumulated on exhaust
port of cylinder and muffler will cause drop in engine
output.
1. Remove pulley cover and cutter cover assembly
(Refer to “5-2 Inspecting and replacing belt).
2. Remove cylinder cover assembly (Refer to “4-1
Replacing air filter”).
3. Remove spark plug cap from spark plug.
WARNING DANGER
Ignition switch installed this unit automati
-
cally returns to RUN position. Engine can
start unintentionally. Always remove spark
plug cap from spark plug before pulling
starter rope for maintenance or repairing,
otherwise, serious personal injury can re
-
sult.
4. Remove 4 bolts and muffler with muffler gasket.
5. Inspect cylinder exhaust port (A) and clean the
port using wooden or plastic stick (B) 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.
B
A
A
B
5 mm
