Batteries Hissing

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gr8_2_av8

I ran the engine for about an hour last night, then after shut down I notice that one of the batteries was making a hissing sound. The are just 12 volt wet cells. Is this normal?
 
S

Steve O.

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Jun 4, 2004
125
Hunter 333 Elk Rapids, MI
not normal!

Sounds like you are boiling a battery. Carefully check the water level and then check the charge rate coming from your alternator.
 
S

Steve O.

.
Jun 4, 2004
125
Hunter 333 Elk Rapids, MI
not normal!

Sounds like you are boiling a battery. Carefully check the water level and then check the charge rate coming from your alternator.
 
R

Roy Mosteller

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Jun 3, 2004
95
Boiling Battery

Have not had this problem on a boat but a number of years ago I experienced it with a car. The hissing caught my attention and lifting the hood disclosed a battery that was bulging from the pressure. Problem was a voltage regulator. If I ever discover a similar problem on my boat I will quickly disconnect the battery as pressure being released is not normal and in my opinion very dangerous.
 
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