1995 Johnson Evinrude "EO" 9.9 thru 30, 2-Cylinder Service Manual, P/N 503146, Page 297Get this manual

1995 Johnson Evinrude "EO" 9.9 thru 30, 2-Cylinder Service Manual, P/N 503146, Page 297

Battery Charging Boost charge 12-volt batteries at 50 amperes for 20 minutes (1 000 ampere minutes)If the charger will not
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 startingCharge 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 chartNo 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 electrolyte The proper
water level should be maintained at all times If water is added in freezing weather, the battery should be charged to full