Testing for Spark

Spark Plug Wire Removal:

CAUTION
- Pulling on the wire part of the spark plug lead may break it. To remove the lead, pull only on the boot.
- To avoid breaking the spark plug, be sure to fit the socket squarely over it.

SPARK TEST
- Disconnect the high-tension lead from the spark plug.
- Connect a new spark plug to the high-tension lead.
- Hold the high-tension lead with insulated pliers approx. 5 - 10 mm {0.2O - 0.39 in} from a ground.
- Crank the engine and verify that a strong blue spark is visible. If not, replace the spark plug or high-tension lead as necessary.
NOTE: If a timing light is used to check for spark, some lights will not illuminate at No.2 and No.4 cylinders even if the ignition system is normal.