1998 Johnson Evinrude "EC" 2 thru 8 Service Manual, P/N 520202, Page 117Get this manual
IGNITION OUTPUT TESTS4 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 spark plug holesINotel The following series of steps will systematically isolate a
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
1Remove the spark plug leads from both spark plugsTo prevent damage to the spring terminal on the spark plug lead, twist and pull the cover
2Adjust the spark gap on the spark tester to 38 in(0,9 mmlConnect the tester leads to the spark plug leadsSecure tester clip to clean engine groundtester leads at least in(51 mml from any metal surface