1989 Johnson Evinrude "CE" Colt/Junior thru 8 Service Manual, P/N 507753, Page 131Get this manual
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 STEPTOTAt OUTPUT TEST
1Remove the spark plug leads from both spark plugsTo prevent damage to the spring terminal on the spark plug lead, twist and pu II the cover
111 2Adjust the spark gap on the spark tester to
clip to clean engine ground