Checking Muffler And Exhaust Port - Echo PB-251 Service Manual

PB-251
7-2 Cleaning cooling air passages (continued)
(C)
(B)
(E)

7-3 Checking muffler and exhaust port

ENGINE
3. Remove spark plug cap and clean dirt around
spark plug. Remove spark plug.
4. Install piston stopper 897537-30130 (D) in the
spark plug hole by hand to stop crankshaft rotation.
5. Remove pawl carrier (B) counterclockwise with
6mm L hexagonal wrench 895615-10860.
6. Remove cylinder cover (C).
(D)
7. Inspect cylinder cooling fins for blockage with dirt
or dust.
8. Clean air passage, with wooden stick or com-
pressed air as required.
WARNING
Wear eye protection when working with com-
pressed air. Eye damage can occur from
flying particles.
9. Inspect crankcase air intakes (E). If blocked with
leaves or other debris, clean as required.
1. Remove muffler.
2. Inspect cylinder exhaust port and clean the port
using wooden or plastic stick if carbon are
found.
NOTE: When cleaning the port, always position pis-
ton at Top Dead Center (TDC) to prevent carbon
from entering cylinder. Do not use metal tool and be
careful not to scratch piston or cylinder.
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DANGER