Hitachi CS 33EA Technical Data And Service Manual page 16

(b) Standard setting of the carburetor
• Idle Adjust Screw
-1
2,800 to 3,200 min [rev./min]
(Confirm that the saw chain does not rotate.)
(c) Fine adjustment
• Idling adjustment
(i) By using the Idle Adjust Screw [224] <231>, set the revolutions so that the saw chain does not start
rotating while the engine runs stably.
(ii) Set the idling revolutions to 2,800 to 3,200 min
5. Cleaning the chain oil filler ports
(a) Remove the Chain Bar [110] <111> and remove
sawdust clogging the filler ports.
(b) Remove sawdust from the groove on the Chain Bar
[110] <111> along which the saw chain travels and
from the chain oil filler holes.
(a) With the Cylinder Set [7] <7>, Piston Set [3] <3> and Piston Ring [4] <4> removed, remove carbon
accumulated on the cylinder exhaust port and piston, and use gasoline to thoroughly clean the
disassembled components.
Reassemble the piston so that the arrow provided on the piston head points toward the muffler (clutch).
Apply two-cycle dedicated oil to the bearings and sliding sections for assembly.
(b) Make sure that the Clutch Comp. [93] <94> is left-threaded in the crankshaft.
Disassembly and reassembly
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[rev./min] by using the Idle Adjust Screw [224] <231>.
• Chain oil filler ports
• Chain oil filler holes
Chain oil filler holes
Chain oil filler ports