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Old 04 June 2015, 13:02   #11
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IIRC Merc specify a battery (of which that is one) that must have quite a high cranking output to get the engine spinning fast enough ?
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Old 04 June 2015, 14:01   #12
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I'm running a pair of blue tops in my boat. They are neat (no leaks) and compact, other than that, well, they're batteries.

Unless they're topped up regularly, a single just barely cranks my F115 after about a month of sitting. An hour on the charger takes care of that pretty well.

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Old 04 June 2015, 15:20   #13
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Optima battery

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IIRC Merc specify a battery (of which that is one) that must have quite a high cranking output to get the engine spinning fast enough ?

Is my Numax 110ah 900 cca alright then


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Old 04 June 2015, 15:21   #14
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I'm running a pair of blue tops in my boat. They are neat (no leaks) and compact, other than that, well, they're batteries.



Unless they're topped up regularly, a single just barely cranks my F115 after about a month of sitting. An hour on the charger takes care of that pretty well.



jky

So they need maintained then. Are they not sealed units


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Old 04 June 2015, 15:35   #15
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So they need maintained then. Are they not sealed units


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They are sealed, jky is on about sticking them on charge for a while.


.....sh1t happens.......
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Old 04 June 2015, 15:37   #16
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Fitted a pair 4 plus years ago..... haven't had to touch them since. Fit and forget in my experience. Ran 150 Optus and now merc 150 4 stroke
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Old 04 June 2015, 15:42   #17
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They are sealed, jky is on about sticking them on charge for a while.


.....sh1t happens.......

Dave I leave mine on rib on mooring all season and charge via the Ob. With the Merc's new alternator system would that suffice?


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Old 04 June 2015, 16:04   #18
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Dave I leave mine on rib on mooring all season and charge via the Ob. With the Merc's new alternator system would that suffice?


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Dunno about the new merc system. If the boat is on a mooring & running bilge pump etc. I'd be tempted to have 2 batteries & keep 1 exclusively for starting.
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Old 04 June 2015, 16:20   #19
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Is my Numax 110ah 900 cca alright then


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Oooh its 10 years since my Opti 150 I dunno .. but the dealer specified that battery just for the engine, and I had another for the rest of the leccy .. and it was because the merc/mariner needed that cranking output from it
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Old 04 June 2015, 16:21   #20
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Dunno about the new merc system. If the boat is on a mooring & running bilge pump etc. I'd be tempted to have 2 batteries & keep 1 exclusively for starting.

Sorry Dave that's what I do. I have a DS Wilson 85 ah for the pump and a Numax 110 ah 900 cca fir starting
Which has always been ok. It just I've herd the Erc needs a big bat but I think mine is big enough as it used to start a V6 te stroke 150ho

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