Chrysler 70, 75 and 85 HP Outboard Motors Service Manual OB 3438, Page 109Get this manual
The hydrometer test should be performed firstIf specific gravity indicates less than 1.225the battery must be charged before further testing can be doneA battery which does not accept charge is defective and no further testing is required HYDROMETER
DISREGARD CURVATURE
EYE LEVEL
Hydrometer TestPrior to testinginspect the battery for any damage (broken container, coverloose postetc that would make the battery unserviceableTo read the hydrometer correctly, position the top surface of the electrolyte in the hydrometer at eye level, figure Disregard the curvature of the liquid where the surface rises against the float due to surface tension Draw in only enough electrolyte to keep the float off the bottom of the hydrometer barrel with the bulb released The hydrometer must be kept in vertical position while drawing in liquid and taking the reading
ELECTROLYTE
THERMOMETER