Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 76Get this manual
Winter Storage of Batteries Battery companies are not responsible for battery damage, either in winter storage or in dealer stock, if the following instructions are not observed: 1Remove battery from its installation as soon as possible and remove all grease, sulfate and dirt from top su rface by running water over top of batteryBe surehowever, that vent caps are tight beforehand, and blow off all excess water thoroughly with compressed airCheck water level, making sure that plates are covered
Battery Charging System Troubleshooting
A CAUTION