1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 197Get this manual
Charging System Check Chart Where to Look Cause Procedure Reference
Battery
1Battery defective or worn out 2Low electrolyte level 3Terminal connections loose or corroded 4Excessive electrical load
1Check condition and charge 2Add water and recharge 3Clean and tighten 4Evaluate accessory loads 1Clean and tighten 2Perform ohmmeter tests 3Perform ohmmeter tests 1Perform ohmmeter tests 2Perform running output tests 3Perform ohmmeter tests 1Perform rectifier ohmmeter tests 1Perform variable load tests