Hitachi CS 33EB Service Manual

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● Spark plug
● Checking for sparks
● Magneto Ass’y
[Bold] numbers in the description below correspond to item numbers in the Parts List and the exploded
assembly diagram for the Models CS 33EB/CS 33EB (P).
Always stop the engine prior to disassembly or when replacing the saw chain.
1. Checking the spark of the spark plug
CAUTION:
• Be careful not to touch the metallic portion of the Spark
Plug [21] when pulling the starter handle; otherwise, you
run the risk of electric shock.
• Carefully wipe off any fuel around the plug to avoid a
sudden breakout of fire.
(1) Remove the Spark Plug [21] from the Cylinder [20] Use a
wire brush to clean off all carbon accumulated on the Spark
Plug [21] electrodes, as needed. Adjust the gap between
the electrodes if necessary. Use a cloth to wipe off any fuel
on the electrodes. Remove any fuel left in the Crank Case
[78] according to the procedure below.
(a) With the Spark Plug [21] removed from the Cylinder [20]:
(b) Open the Choke Button [90] (with the Choke Button [90]
pushed) and the Stop Switch [91] in the stop position,
(c) Open the throttle (with the Throttle Lever [134] pulled),
and then
(d) Pull the Starter Knob [158] several times.
(2) Insert the Spark Plug [21] into the plug cap, and then place
the electrodes into contact with the metallic portion of the
engine. Under these conditions, set the Stop Switch [91] to
the startup position and pull the Starter Knob [158].
(3) When the procedure above is competed normally, the
Spark Plug [21] electrodes should make a snapping sound
to generate sparks.
2 .Adjustment of air gap (clearance)
(1) Remove the Tapping Screw (W/Flange) D5 x
20 (Black) [33] and then the Recoil Starter
Ass’y [160].
(2) Loosen the two Hex. Socket Hd. Bolts
(W/Flange) M4 x 18 [54] so that the Ignition
Coil [53] is temporarily secured.
(3) Insert a clearance gauge between the
magnetic steel portion around the perimeter
of the Magneto Rotor Ass’y [67] and the
Ignition Coil [53], and then adjust the
position of the Ignition Coil [53] so that the
clearance becomes 0.3 to 0.4 mm.
(4) Under this condition, firmly tighten the
Hex.Socket Hd. Bolts (W/Flange) M4x18
[54].
Inspection and repair procedures
High voltage cord
Ignited sparks
Spark plug
Plug cap
Gap between
electrodes
(0.6 to 0.7 mm)
Remove all carbon.
0.3 to 0.4 mm
Hex. Socket
Hd. Bolts (W/Flange)
M4 x 18 [54]
Ignition Coil [53]
Magneto Rotor Ass’y [67]

Hitachi CS 33EB Specifications

General

Brand	Hitachi
Model	CS 33EB
Category	Chainsaw
Language	English