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post #7 of Old 07-07-2009
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Originally Posted by hellosailor View Post
As long as the deep cycle battery can safely supply the "impulse current" or surge current needed by your starter motor (which can be 1.5-2.5 kilowatts easily) without overheating and warping the plates or internals, it is perfectly safe.

I had a discussion about this with JCI (possibly the largest US battery maker) some time ago, for a starting battery that had to sit for long periods and would be better served by using a deep cycle. Their answer was that if the deep cycle had enough capacity--it was actually the better way to go.

So, depending on how much power your start draws, it can be perfectly good to do it this way. On a 41? Dunno, you'd need to find out how much power that is.
that's just how I do it on Catalyst w/ a 15 hp Merc 4-stroke to start and only one battery.... no problems.

S/V Catalyst:
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Pearson 26 #1200
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