Smallest battery for 2GM20

Troubadour said:
That's silly it's 90Ah.
If it's just for starting the Yanmar this would easily do it http://www.tayna.co.uk/063-Enduroline-Car-Battery-380CCA-P8401.html

Red Flash batteries have fantastic output but are priced accordingly.
I'd recommend buying from http://www.dmsshop.co.uk/ as DMS are the master distributor and provide tech backup. Tayna buy through DMS.

Yes Tayna have been quoting exaggerated CCA figured for Red Flash - correct figures from DMS.
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Thanks for that, need to start another thread not to hijack this as my batteries have different positive leads to a 'Both 1 & 2' knob but share the same neutral lead - maybe not such a good idea with an existing 85 amp battery and a lower amp new battery - wondere about charging different type batteries if on Both. :confused: I'm happy to pay for the cheaper half price battery for now if it lasts half the time or more than the one that is twice as expensive!
 
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prv said:
For what it's worth, I've had three years of more or less trouble-free use from a pair of bog-standard Halfords leisure batteries on Kindred Spirit. You don't always need the best possible kit.

Pete
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+1
To start my big old Sabb i used the old batt off swmbo's yaris and thats tiny. it gave up the ghost in the summer after 2 extra years, and i have replaced it with a £38 batt also tiny with a FOUR, yes four year warrenty from the local car spares (Dave Edwards). for domestics, i have a 110 ah leisure from force 4.
 
Hi Nathan
When I installed a separate starter battery for the 1GM10 in my Folkboat, I used a 330CCA battery from Barden Batteries. I think it was for a smallish car. The physical size was a key limitation and the battery served well for as long as I had the boat.
I don't think you need a much bigger battery than that for your 2GM20.
 
Tranona said:
Nathan asked for the smallest AGM starter battery, and that is it. Whether he wants to pay the £150 is then his decision.
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I do. I want a small battery, not a cheap one. I had a decent AGM battery on Kudu and it was rock solid. Always had problems with flooded batteries, and my current ones got killed after I left a light on. Oops.
 
I've successfuly started my 1GM10 with the old battery from my Bonneville. Mind you it won't manage more than two sucessive starts and with the current temperatures I doubt it'd manage more than once.
 
KenMcCulloch said:
Hi Nathan
When I installed a separate starter battery for the 1GM10 in my Folkboat, I used a 330CCA battery from Barden Batteries. I think it was for a smallish car. The physical size was a key limitation and the battery served well for as long as I had the boat.
I don't think you need a much bigger battery than that for your 2GM20.
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both engine probably have the same starter motor
 
nathanlee said:
I do. I want a small battery, not a cheap one. I had a decent AGM battery on Kudu and it was rock solid. Always had problems with flooded batteries, and my current ones got killed after I left a light on. Oops.
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Don't hesitate! I have a Red Flash 1100 which allowed me to increase my domestic in the limited space from an 85AH to a 110 so well worth the money. Trouble free and lasted, so definitely worth buying. Suggest also that you also install a split charging system. I use the BEP Marine cluster with VSR.
 
The 1, 2 and 3-cylinder Yanmars all have a CCA requirement of 200A. My Red Flash 900 will start my 3GM30F but only when it is well charged up. It would start a 2GM but without much reserve if it didn't start immediately. Mine is really too small but I thought it worth a go. Ideally a size bigger would be better.
 
very helpful folks, thank you.

I hadn't heard of red flash before this thread. Will be getting the 1000 I think.
 
Havent read all pages of the thread so if this repeats..sorry

Suggest the OP gives due consideration to being able to link all batteries for emergency starting.
Also if he decides to fit an electric windlass these are often run from the engine battery rather than the domestics....
and maybe fit some quick bleed system to the fuel system eg a squeezy bulb to avoid prolonged cranking if theres a problem..

I wus told once, dont judge a battery by its size per se but by the weight, presumably of good lead an stuff in it:eek:
 
Blueboatman said:
if he decides to fit an electric windlass these are often run from the engine battery rather than the domestics....
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They often are, but I don't see why they should be. The service bank will usually be bigger (and if not bigger, at least the same size) and should be getting the best charging (as it gets the deeper discharging). So it's better suited to running a windlass, with the added benefit that you won't flatten your start battery.

Pete
 
Tranona said:
Don't hesitate! I have a Red Flash 1100 which allowed me to increase my domestic in the limited space from an 85AH to a 110 so well worth the money. Trouble free and lasted, so definitely worth buying. Suggest also that you also install a split charging system. I use the BEP Marine cluster with VSR.
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+1

Odyssey PC925 works for me (1GM10) as additional starter batt, and I paralleled the two 85AH wets as domestics.

A couple of other Odysseys used in motorbikes (Where CCA is important) also work well.
 
Update: I've ordered a Red Flash 1000, which I got for £139 inc VAT+delivery, from Tayna Ltd (via ebay).

I also got a Sterling Pro Charge Ultra 20amp charger for £219 all in, which ain't too shabby at all. Has anybody had any dealings with cactusnav? Their website is atrocious, which put me right off, but the price was sufficiently low to coax me in, in the end. I hope it wasn't a mistake.

I just need a decent domestic deep cycle pack now, and the Christmas holiday project can commence.
 
Too late but I'll say it anyway - the alternative approach if you have limited acommodation for batteries is to have two leisure batteries and no dedicated starter battery. It's worked for me for many years - two Elecsol batteries and a VP2002. I do actually carry a £30 emergency starter pack but have never had to use it.
 
nathanlee said:
I also got a Sterling Pro Charge Ultra 20amp charger for £219 all in, which ain't too shabby at all. Has anybody had any dealings with cactusnav? Their website is atrocious, which put me right off, but the price was sufficiently low to coax me in, in the end. I hope it wasn't a mistake.
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Yes, we have bought lots of equipment from Cactus, although not very recently. Never had a problem with them.
 
reeac said:
Too late but I'll say it anyway - the alternative approach if you have limited acommodation for batteries is to have two leisure batteries and no dedicated starter battery. It's worked for me for many years - two Elecsol batteries and a VP2002. I do actually carry a £30 emergency starter pack but have never had to use it.
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Bet it's dead!:D

N
 
Re PRV. House batteries are usually deep cycle for low amp long period discharges, starter batteries otoh designed to give the big cranking amps, that's all.
Either way, with engine/ alternator running offers highest volts to any windlass
 
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