Moody Blue
Captain
- Joined
- May 24, 2004
- Messages
- 3,136
I have a DEKA Marine Master starting battery that is the maintenance free type. My motor, a 1992 40HP mariner, puts out 15-17V when running flat out. I have been told that this high charge voltage could boil off the water in the battery and that I should check it frequently. From what I can see, this battery is completely sealed. I could try and pry off what looks like a factory installed cover but it looks quite permanent. I don't want to boil the battery dry but I also don't want to try to open something that was not intended to be opened. Any suggestions ?