1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 119Get this manual
IGNITION OUTPUT TESTS i plugs installed and torqued in the cylinder headIf neces-
All cranking output tests must be performed with spark
sary 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
STEP 1,- TOTAL OUTPUT TEST
L!J plugs