1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 132Get this manual
IGNITION OUTPUT TESTSCD II ill plugs installed and torqued in the cylinder headIf necessary to remove the spark plugs, be sure to keep the spark tester away from open spark plug holesproblem area in the ignition systemTo reduce your troubleshooting time and to avoid incomplete results, perform these steps in the order written
All cranking output tests must be performed with spark
fN=J The following series of steps will systematically isolate a
STEPTOTAL OUTPUT TEST
[!] 1Twist and remove the leads from both spark plugs[:;1 2Adjust the gap on the spark tester to 12 in(12 mm)Connect tester leads to the spark plug leadsSecure tester clip to clean engine groundTo prevent possible arcing of high voltage, route tester leads at least in(51 mm) from any metal surface
i or spark tester during cranking tests