1978 Johnson 55 HP Outboards Service Manual, Page 19Get this manual
TROUBLE CHECK CHART (CONT) TROUBLE POSSIBLE CAUSE ACONTROL BOX AND CABLE CONNECTIONS See Section Control box andor power head connections not coupledcorroded, or coupled incorrectly BLOWER UNITSee Section Incorrect lubricant (OMC Hi-Vis Gearcase Lube only) Shifter dog damaged ACHARGING CIRCUITSee Section Faulty wiring Rectifier diodes damaged Shorted or open stator windings ASTARTING CIRCUITSee Section 7
6SHIFT WILL NOT OPERATE
7ALTERNATOR WILL NOT OPERATE