1990 Johnson Evinrude "ES" 9.9 thru 30 Service Repair Manual, P/N 507871, Page 120Get this manual
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STEPSTOP CIRCUlf TEST Elimination Test
"'" avoid possibIe shock hazard, do not handle ignition coilsor spark tester during cranking tests2 Crank engine and observe results at spark tester If spa