Chrysler 20 and 30 HP Outboard Motors Service Manual OB 3435, Page 104Get this manual
Heavy Load TestThis test is performed to make sure the battery can deliver current under load Proceed as follows : 1Connect battery tester to the battery, and follow the manufacturer's instructions2Discharge the battery under fixed load, at three times the ampere-hour rating for approximately 15 seconds, then read the terminal voltage 3If the battery is in satisfactory conditionthe terminal voltage reading should remain above volts4If the terminal voltage falls below this valuethe battery is either defective or it is not fully charged
Self-Discharge Rate Chart Approximate Allowable Self-Discharge Per Day For First Ten Days (Specific Gravity)
0.0025 points 0.0010 points 0.0003 points
Temperature
100 (37.8 C) 80 (26.7 C) 50 (10 .0 C)