1994 Johnson/Evinrude "ER" 2 thru 8 outboards Service Manual, Page 250Get this manual
After correcting to 80 (2JO C), interpret readings as follows: All cell readings uniform and above 1.225 specific gravity indicates battery is serviceable, but may require charg ing All cell readings uniform and below 1.225 specific gravity, charge fully and retest Variation of more than 30 points (0.030) specific gravity between any two cells, indicates battery condition is questionableRecharge and retest before replacing battery3Capacity Test Satisfactory capacity tests can be made only when the battery electrolyte equals or exceeds 1.225 specific gravity at 80 (2JO C)12009
Terminal Voltage Test
ill procedures
Use extreme caution during any load testingImproper could overheat battery and cause electrolyte gassingThis might cause an explosive atmosphereaVariable Load High Rate Discharge Tester (Recommended)