1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 274Get this manual

1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 274

Battery Charging Boost charge 12-volt batteries at 50 amperes for 20 minutes (1 000 ampere minutes)If the charger will not
state of charge by making specific gravity readings with battery hydrometerIt is suggested that specific gravity readings
and checking for replacement of water be made every two weeks If the battery has been standing for 30 days, recharge the
battery before placing it into service to ensure reliable starting Charge battery to the specific gravity recommended by
the battery manufacturerCheck the specific gravity of the battery electrolyte with battery hydrometer, preferably one that
has built-in thermometer and correction chart No other method should be used to determine the charge condition of batteryNote
also that hydrometer reading is not accurate if water has been recently added because the water has not had chance to mix
with the electrolyteThe proper water level should be maintained at all timesIf water is added in freezing weather, the battery