1976 Evinrude 200 HP Outboards Service Manual, PN 5199, Page 137Get this manual
DESCRIPTION The complete electrical system is made up of the ignition system, the starter system, the alternator charging system, and the storage batteryAlso included are the instrument and cable group at end of Section 9This section will cover the starter system and the charging system, and battery maintenance
Check the electrolyte level in each cellIf electrolyte level is below the plates, it is possible the battery is permanently damagedAlso look for dirt, oil or other contaminants floating in the electrolyteSAFETY WARNING Battery electrolyte is an acidic solution and should be handled with careIf electrolyte is spilled or splashed on any part of the body, immediately flush the exposed area with liberal amounts of water and obtain medical aid as soon as possibleThe sources of deficiencies noted in the visual inspection should be located and corrected before installation of new batteryBHydrometerSee Figure 7-1 This test can only be used when there is sufficient electrolyte above the battery plates to fill the hydrometer tubeDo not, however, take readings immediately after refilling the cells with water