1978 Johnson 175, 200, 235 HP Outboard Service Repair Manual P/N JM-7810, Page 44Get this manual
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Port Side 3 Spark plugs 4 Igl1iti coils 5l'lnil board Fig'
pl'imary througl1 SCR #2 and back to the capacitor, iduig higl1 voltage into the igl1ition coil secondal'y, fiig aCl'OSS tl1e spark plu