1967 Evinrude StarFlite 80 HP Outboards Service Manual, PN 4359, Page 84Get this manual
Connect one lead at voltmeter to red wire of voltage regulator connector, other wire to groundSee Figure 7-17If battery voltage is in excess of 15 volts, the regulator should be replacedCheck the following before proceeding with electrical testing Disconnect battery leads before tightening or changing connections on dash instruments or any part of the charging circuitaBatterySee Battery Testing"Battery Care", and "Battery Maintenance" in this SectionbWiringCheck for corroded or loose connections, and clean and tighten all connectionsCheck for worn or frayed insulationcCheck battery polarityIf battery polarity is reversed, diodes will be damagedCHECK FOR DAMAGE TO RECTIFIER DIODES as described under "Checking Rectifier Diodes dElectrical loadExcessive electrical load from too many accessories will run battery downeAmmeterCheck by substituting known good ammeter fFuse (15-amp alternator)Maximum chargeCheck 3D-amp fuseIf visual inspection of the electrical system shows all components to be in good condition, an electrical inspection will be necessary to determine which component of the charging system is the cause of troubleSee Figure 7-16