1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Manual, P/N 507870, Page 117Get this manual
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 holesThe 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 ,} All cranking output tests must be performed with spark
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
clip to clean engine ground
L!J Connect the tester leads to the spark plug leadsSecure tester
tester leads at least in(51 mm) from any metal surface
[":;1 2Adjust the spark gap on the spark tester to