1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 181Get this manual

1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 181

Battery Testing Battery electrolyte is acidichandle with careIf electrolyte contacts any part of the body, immediately flush
charging batteryThis test can only be used when there is sufficient electrolyte above the battery plates to fill the hydrometer
tubeDo not, however, take reading immediately after refilling the cells with waterThe battery must be charged, then checked
with hydrometerView the hydrometer with your eye on the same level with the liquid surfaceThe float of the hydrometer must
be free Make correction for the temperatureSpecific gravity will vary points (0.004) with every 10 (6 C) temperature change
For each 10 (6 C) below 80 (27 C), subtract points from hydrometer readingFor each 10 (60 C) above 80 (2r C), add points
to hydrometer readingAfter correcting to 80 (2r C), interpret readings as follows: All cell readings uniform and above 1.225
specific gravity indicate battery is serviceable, but may require charging All cell readings uniform and below 1.225 specific