I've been doing some research on batteries after realizing my flooded cell group 27 won't cut it on my new Vexus. I came across this thread on here:

http://www.bbcboards.net/showthread.php?t=906664

Apparently new Mercry 4 strokes require and AGM battery. Mine is the 115 ProXs which is a 4 cylinder. The thread only mentions the 6 and 8 cylinder engines. I did have an issue with charging when I first got my boat. Wondering if it was the dealer installed group 27 flooded cell battery? Anyone else with a new Merc 4 stroke have an issue?

I'm planning in upgrading to a group 31 AGM anyways. Just thought I would point this out to help anyone else who may experience an issue or make everyone aware of the Merc 4 stroke battery requirements.