Ignition Coil [53] - Hitachi CS 33EB Service Manual

[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
● Spark plug
Gap between
electrodes
(0.6 to 0.7 mm)
● Checking for sparks
● Magneto Ass'y
0.3 to 0.4 mm
Magneto Rotor Ass'y [67]
-5-
Remove all carbon.
High voltage cord
Plug cap
Spark plug
Ignited sparks

Ignition Coil [53]

Hex. Socket
Hd. Bolts (W/Flange)
M4 x 18 [54]