P 11/ 22
Repair
[4]DISASSEMBLY/ASSEMBLY
[4]-7. Ignition system
CHECKING PLUG CAP
(1)Remove Plug cap from Spark plug, then check the continuity between Plug cap spring and the ground (earth) terminal of Ignition coil with a circuit tester. If there is normal continuity, the resistance value will be 2.0kΩ±0.5kΩ. (Fig. 44)
(2)If there is no or intermittent continuity, check the continuity between Ignition cable and Plug cap spring by following the procedure described below.
1.Apply spray lubricant in Plug cap, then pull out Plug cap spring together with Ignition cable from Plug cap using small pliers. (Fig. 45)
2.Check if Plug cap spring is properly connected to Ignition cable. If not, connect them properly.
Also check Plug cap for any crack. If Plug cap is cracked, replace it with a new one.
3.Insert Plug cap spring in the center of Ignition cable. Then using small pliers, put them back into Plug cap while taking care not to disconnect Plug cap spring from Ignition cable.
4.Make sure that Plug cap spring is firmly connected to Ignition cable by doing the same as you did in step (1) with a circuit tester.
Note: Poor continuity between Plug spring cap and Ignition cable will result in no or weak spark.
Fig. 44 | Fig. 45 |
Plug cap |
Plug cap spring |
Circuit tester |
Primary wire of |
Ignition coil |
Small pliers
Plug cap spring
Ignition coil
CHECKING SPARK PLUG
WARNING !!
•When a spark is produced,
•Fuel is extremely flammable and fuel vapors are explosive. Therefore, clean up spilled fuel before starting to check for spark. Also, be careful not to do the check near Carburetor.
(1)Remove Plug cap from Spark plug, then Spark plug from Cylinder with the supplied socket wrench. Note: If the electrodes of Spark plug are wet, wipe them with a rag then dry them with an air blower.
(2)Using a wire brush, carefully clean up carbon deposits (if any) from the electrodes and the ceramic insulator around the center electrode.
(3)Adjust the electrode gap to 0.7 to 0.8mm by carefully bending the side electrode.
Use Feeler gauge set (1R366) to check the gap width:
between the center electrode and the side electrode, insert 0.8mm leaf of Feeler gauge set. (Fig. 45)
(4) Install another Spark plug into spark plug hole to prevent air/fuel mixture from leaking outside of engine.
(5) Connect the removed Spark plug with Plug cap, then ground the threads of Spark plug to a proper metal part of the engine.
(6) With Stop switch on, pull Recoil starter knob gently and check for spark. Note: • It is hard to see the spark in a bright location. Therefore, be sure to
do the check in a shady but
• Sparks do not happen at without exceeding 500 rpm.
(7) If spark is not produced, replace Spark plug with a new one,
then check for spark by following the procedure (1) to (6) once again.