1997 Johnsoon Evinrude "EU" 50 thru 70 3-Cylinder Service Manual, P/N 507266, Page 126Get this manual
IGNITION OUTPUT TESTS &
All cranking output tests must be performed with spark 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 holes
NoteThe following series of steps will systematically isolate problem area in the ignition systemTo reduce your troubleshooting time and to avoid incomplete results, perform these steps in the order written
STEPTOTAL OUTPUT TEST
1Twist and remove the spark plug leads from all spark plugs
rn 2Adjust leadsgapthe spark plug leadsSecure tester clip to the on the spark tester to 12 in(12 mm)Connect tester to
clean engine ground Note To prevent possible arcing of high voltage, route tester leads at least in(51 mm) from any metal surface
To avoid possible shock hazard, do not handle ignition coils or spark tester during cranking tests