1978 Johnson 175, 200, 235 HP Outboard Service Repair Manual P/N JM-7810, Page 159Get this manual
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ALTERNATOR OUTPUT STEP2
CAUTION: Shut engine and discol1l1ect battery checking, rectifiel'Use oh111meterigh ohm scale
Disconl1ect rectifier leads
COl1l1ect l1 ohmmeter to engi