3-5. Ignition System (cont.)
5 / 20
3-7. Inspection/Replacement of Stop Switch
1) Remove Plug cap, and remove Spark plug with supplied Wrench 13-16.
Note: If Spark plug is wet with fuel, wipe it off with a clean cloth and
dry Spark plug with power blower.
2) Remove carbon deposits on the center electrode and the ground
electrode of Spark plug using wire brush.
3) Adjust the spark gap to 0.6-0.7mm by inserting a 0.7mm Spark plug
gauge in the spark gap. (Fig. 12)
4) Check if the spark occurs in the spark gap as described below:
Install Plug cap on Spark plug, touch the threaded portion of the plug
to the engine block, and then pull Recoil starter rope.
5) If no spark occurs, check the electrical conduction as described above
in 1) of CHECKING PLUG CAP.
And if the conduction is normal, replace Spark plug by new one and
re-check for a spark in the spark gap.
INSPECTION OF SPARK PLUG
1) Remove Top handle cover by removing four 4x18 Tapping screws.
2) Using circuit tester, check the electrical conduction between the terminals.
Stop switch is normal if the terminals are not conducted with the engine
turnded on and conducted with the engine turned off. (Fig. 10)
INSPECTION
Fig. 15
Spark gap = the distance between the center
electrode and the ground electrode
Fig. 12
0.6 - 0.7mm
Center electrode
Ground electrode
3-6. Removal/Installation of Ignition Coil Complete
1) Before removing Ignition coil complete, remove Starter case, pull Plug cap off from Spark plug and pull the ground
(earth) wire off from the terminal on Ignition coil complete. (Fig. 13)
2) Remove two M4x20 Hex socket head bolts. Now Ignition coil complete can be removed. (Fig. 14)
Note: Be careful not to lose two Spacers through which the Hex socket bolts are inserted.
REMOVAL
1) Put Spacers and Ignition coil complete in place, and pretighten M4x20 Hex socket head bolts. Do not tighten the bolts
securely in this step. Insert a 0.3mm thickness gauge between Ignition coil complete and the magnet portion of Flywheel.
Ignition coil complete will stick to the magnet portion of Flywheel. Then tighten the bolts securely.
2) Remove the thickness gauge, then turn Flywheel to make sure that Ignition coil complete does not touch Flywheel.
INSTALLATION
Fig. 14
Fig. 13
Ground (earth) wire
Ground (earth) terminal
M4x20 Hex socket head bolt (2pcs)
Spacer
(2pcs)
Flywheel
Switch
