-10-
•
Magneto Ass’y
•
Spark plug
0.3mm to 0.4 mm
Hex. Socket Hd. Bolt (W/Flange)
M4 x 18
[51]
Ignition Coil
[50]
Magneto Sub Ass’y
[80]
High voltage cord
Ignited sparks
Spark plug
plug cap
•
Checking for sparks
[Bold]
numbers in the descriptions below correspond to item numbers in the Parts List and exploded
assembly diagram for the Models CS 40EA (S) and CS 40EA (PS).
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
[13] 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
[13]
from the Cylinder Ass’y
[63]
.
Use a wire brush to clean off carbon accumulated on the
Spark Plug
[13]
electrodes, as needed. Adjust the gap
between the electrodes if necessary. Use a cloth to wipe off
any fuel on the electrodes. Remove fuel left in the Crank
Case Set
[69]
according to the procedure below.
(a) With the Spark Plug
[13]
removed from the Cylinder Ass’y
[63]
:
(b) Open the Choke B
u
tton
[92]
(by pushing it) and set the
Stop Switch
[93]
to the stop position.
(c) Open the throttle (by pulling the Throttle Lever
[122]
).
(d) Pull the Starter Knob several times.
(2) Insert the Spark Plug
[13]
into the plug cap, and then place
the electrodes in contact with the metallic portion of the
engine. Under these conditions, set the Stop Switch
[93]
to
the startup position and pull the Starter Knob.
(3) When all the above are normal, the Spark Plug
[13]
electrodes make a snapping sound to generate sparks.
2. Adjustment of air gap (clearance)
(1) Remove the Tapping Screw (W/Flange) D5 x 20 (Black)
[39]
and then the Recoil Starter
[174]
.
(2) Loosen the two Hex. Socket Hd. Bolt (W/Flange) M4 x 18
[51]
to the extent that the Ignition Coil
[50]
is
temporarily secured.
(3) Insert a clearance gauge between the magnetic steel portion around the perimeter of the Magneto Sub
Ass’y
[80]
and the Ignition Coil
[50]
, and
then adjust the position of the Ignition Coil
[50]
so that the
clearance becomes 0.3 mm to 0.4 mm.
(4) Under this condition, firmly tighten the Hex. Socket Hd. Bolt (W/Flange) M4 x 18
[51]
.
Gap between
electrodes
(0.6 to 0.7 mm)
Remove carbon.
Inspection and repair procedures
