Good afternoon fellow boaters! Just need some advice—so my 2005 Sundance 280 4.3L’s has this problem of either having one of the engines shut off a few mins after I start it up, or an engine not kick on at all (Yesterday went out on the lake, shut it off, and then had to drive back with one engine because the other wouldn’t kick on even though it ran fine for an hour). Sometimes I’ll have to rev the engines as I’m kicking it on to give it some power so it doesn’t shut off. I’m guessing this is a battery issue. So I came to get some new batteries, and I realized that I have 3. My guess is one starting battery and two batteries (I think they’re called full cycle or something like that). However the lady at West Marine told me that the batteries come in different families…24, 27, etc. My boat has a starting battery, and then a 24 AND a 27. Is this the problem? Should both batteries be the same family? Also, would it be okay to just replace the 24 and 27 with new 27s? I have to go check what family the starting battery is, but I just know I have a mix of two for my other batteries and I’m starting to think that this may be the problem with one of our engines not kicking in (note: sometimes it’s the left engine and sometimes it’s the right). Do I just replace all batteries with new 27s? Or do I change them with families accordingly?