1968 Evinrude Big Twin, Big Twin Electric, Lark 40 HP Outboards Service Manual, Page 80Get this manual
an to 10 ampere 10ad turning ignition switch to "ON" position and turning lights or other accessoriesAfter minute, with to 10 ampere 10ad still read individua1 vo1tages of battery with vo1tmeter having .01 volt sca1e divisionNOTE After testing, c10se openings made in sealing compound the prods of the voltmeter above the connector strapspressing the sealing compound with blunt toolIf any
specific gravity readings with battery hydrometerIt is suggested that specific gravity readings and checking for rep1acement of water made every two weeksIf the battery has been standing for 30 daysit shou1d recharged before being p1aced into service to assure reliable startingCharge battery to the specific gravity recommended the battery manufacturerThe specific gravity of the battery electrolyte shou1d checked with battery hydrometer, preferably one that has built-in thermometer and correction chartNo other method should used to determine the charge condition of battery Note also that hydrometer reading is not accurate if water has been recently added, due to the fact that the water has not had chance to mix with the e1ectro1yte The proper water leve1 should maintained at timesIf water is added in freezing weather, the battery should charged to fuH charge at onceOn1y pure distilled water or water approved for battery use shou1d added to the battery to replace water lost through evaporationNever add acid cept when acid has been 10st Install the battery near the motorFor mounting the battery, use frame securely fastened to the boatloose battery shift in the boat, damaging itself or other equipmentTighten nuts evenly until battery is secureIf ho1d-down nuts are too tight, distortion and damage to will result