1978 Johnson 175, 200, 235 HP Outboard Service Repair Manual P/N JM-7810, Page 47Get this manual
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TROUBLESHOOTING MAGNETO IGNITION SYSTEM
3 Ohmmeter4imig
troubleshooting step chal't is providedIt is deto aic in dtmiig which mt is causing the tl'ouble and whether it is good or ba