Re: Can I use a car battery for my mercruiser?
I vote for using a Marine Starting Batt, not a deep cycle, thats if you are just concerned about starting and are not going to be sitting for hrs with the engine off and a stern light and assorted other electronics on. A marine batt should be built to withstand the jarring better, to keep the lead plates in place, as previously stated, weather its a starting or deep cycle. My 86 4.3 does seem to turn over better with a starting batt as opposed to a deep cycle. For whatever reason. If i had a car batt lying around, I would use it, if I was buying new, it would be marine rated...