1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175 Service Repair Manual, P/N 507874, Page 111Get this manual
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OUTPUT TESTSV4
[!] 1 Twist and remove the spark plug leads from all spark plugst=J tester leads to the spark plug leadsSecure tester clip to a
clean engine groundTo prevent possible