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Old 14 December 2010, 04:20   #11
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Country: UK - Scotland
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Ah, but how many of those failures are going to happen at a convenient time when your boat is not away from home and your'e near a Halfords to pick up a replacement?
He's got two engines so he'd be really unlucky to have both fail simultaneously. Then he might need to get out his string to pull start the engine.

You are never that far from a halfords or motor factors of some sort in the UK - so a failure on a long trip is not likely to bugger up the whole trip.

It sounds like Bruce keeps a close eye on condition and so will have an early warning of many failures. With a "quality" battery you may become over confident and stop watching it - a failure then comes as a surprise.
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Old 14 December 2010, 04:53   #12
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I bought two for 100 delivered and after checking the price of "bluetops" I reckon I could replace both of them three or four times over for the same cost as one set of them.
Know what you mean re price Bruce , but when we changed to an Opti, received lots of advice from different quarters that the Opti's needed a rating of 1000 ( Minimum ) Marine Cranking Amps & 750 ( Minimum ) Cold cranking Amps.....Understand they can also throw a wobbler (electronically - faults etc) if they don't have correct spec batteries....guess other modern /manuf engines may have similar requirements?

As has been said before, what battery will depend on what engine the OPer goes for, but with regards price, think I ended up paying around 130 each after quite a bit of haggling /shopping around....I remember that there was a BIG difference in pricing out there, some places nearer 200 each!!

Off to sea now.....going to try and find some Dolphins to monitor
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Old 14 December 2010, 05:07   #13
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Like I Said
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You pays your money & makes your choice. I want to be sure that the engines will start, especially if we have divers in the water (me!!) Can't go wrong with Optima blue tops, but you pay for 'em Never let me down on 3 boats.
It's your money, your choice
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Old 14 December 2010, 12:40   #14
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My last boat had a single leisure battery and it was still going strong after 4 years use and never let me down.
Now I have two and one of them has failed after about 2 1/2 years, I suspect a hard landing has cracked or damaged it as it won't hold a full charge now for more than a day or so and its the same age and type as the other.
All that happened is that the first start of the day requires me to switch to the other battery, after 30mins running both work perfectly for the rest of the day.
I am just changing them both as a precaution. Its not that I wouldn't mind two Blue tops but they are just too expensive for my wallet............
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Old 14 December 2010, 13:19   #15
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My advice would be to fit the biggest batteries you can possibly fit in where they go, you can never have too much battery power
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Old 14 December 2010, 14:16   #16
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My advice would be to fit the biggest batteries you can possibly fit in where they go, you can never have too much battery power
But that's just the Martini motto for everything isn't it. Biggest is best
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Old 14 December 2010, 15:13   #17
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What, are you suggesting it isn't
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Old 15 December 2010, 07:25   #18
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Yes, until it comes to mooring fees
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Old 15 December 2010, 08:10   #19
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For what it's worth, every so often I perform a practice pull start on the engine. Using the law written by a certain Mr Sod, this has ensured my battery (bought at milliseconds' notice for 45 from a Kwik Fit near my location at the time) has so far not failed me!

For the record, I have since discovered my original 80AH deep cycle batt had nothing wrong with it, the problem was corrosion on the isolator innards, so when "on" it had a nice resistive lump of corrosion between the terminals. Ironically the emergency purchase is about half the weight of the old one......


All joking aside, if your engine(s) is / are old school 2- strokes then once they are spinning all the battery needs to do is smooth the suupply to your electronic toys & store some electrical juice to crank the engine next time you start.
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