Built-In Hydrometer Check

NOTE: Before testing battery, lightly tap eye of hydrometer to ensure that gas bubbles have not lodged themselves in hydrometer. If battery needs replacement, check charging system for proper operation.




Tap lightly on the eye and observe the built-in hydrometer.
- Green dot visible: this indicates a sufficient state of charge for further testing.
- Dark indicator, green dot not visible: this indicates an insufficient charge of less than 65 percent. The battery must be charged according to the "Battery Charging" procedure.

IMPORTANT: Do not charge a battery with a clear or yellow indicator.




- Clear or yellow indicator: this indicates the battery's electrolyte level is low and is not serviceable. The battery must be replaced.

IMPORTANT: Check electrical system before replacement.




1. Green dot - 65 percent or greater state of charge
2. Dark dot - Below 65 percent state of charge
3. Yellow or Clear dot - Low level of Electrolyte