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Posted By Discussion Topic: BMC 1500 starter battery ?

Similar Threads That Might Help :
BMC 1500 starter battery ?| bmc 1500| bmc 1500| bmc 1500| bmc 1500|

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Rob_Mac
Apr-25-2011 @ 9:42 AM                           Permalink
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Hello - does anyone know the ideal amperage for a  BMC diesel 1500 starter battery? The 60amp I have on there at the moment is just not doing it.

thanks
------------------------
Thanks for all the answers - very useful
Rob

I'd rather be afloat

This message was edited by Rob_Mac on Apr-25-11 @ 7:07 PM

zacthedog
Apr-25-2011 @ 10:17 AM                           Permalink
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Mardles sometimes
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i would havethougnt 80ah was fine could it be another fault, are
you having trouble starting?

Gary
1hr 30mins 60mls away
forum girly swot 19/3/2010 (IP3)

Glen_Mist
Apr-25-2011 @ 10:37 AM                           Permalink
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I've got a 110A/H on mine, as i had on my last boat with a BMC 1.5, and that whizzes it over lovely.

CJ

Born free, taxed to death.

VetChugger
Apr-25-2011 @ 11:51 AM                           Permalink
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Just make sure its a cranking battery rather than a leisure battery. I have an 85aph heavy duty which has plenty of guts!

Trevor

www.normanboats.co.uk


steve
Apr-25-2011 @ 5:30 PM                           Permalink
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hi there ,
most bmc's i know have 110AMP batteries to start with , i certainly do on my 2.2 bmc ,

steve and vicky

ADI
Apr-26-2011 @ 10:23 PM                           Permalink
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this is a good en, its high cranking power, just got it myself.

Regards Adi, Michelle, Beck
and Braydon.

Strowager
Apr-27-2011 @ 8:27 AM                           Permalink
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Trevor's point about cranking amperage is crucial with a heavy inboard diesel like the BMC 1500.

Their heavy starter motors draw a huge amperage in just seconds when the engine is stone cold, and require a very high cranking current battery rather than a straight leisure battery.

Outboard motors can usually get away with a leisure battery for starting because their CC current draw is very small by comparison. Interestingly, the link provided by ADI is described as a leisure battery, but the CCA quoted in the spec is 950, which is amazing, much higher than most of that type.  Most 85amp or 110amp Leisure batteries have insufficient CC capacity for starting a 4 cylinder diesels, and their life will be shortened if they do work at all.

Leisure batteries are designed to be able to "deep cycle", that is to be continuously run down to less than half their capacity without suffering any ill-effect, whereas starting batteries have heavier internal plate connections to permit massive starting currents, but suffer if regularly dropped below half-charge.

Dual purpose leisure/starting batteries are available, as a compromise between the two tasks, but they are generally more expensive.

ADI
Apr-27-2011 @ 9:47 PM                           Permalink
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would just like to add my starter battery weighs nearly twice as much as the domestic ones,   its a beast!!!!!

Regards Adi, Michelle, Beck
and Braydon.

555tcv
Apr-28-2011 @ 8:31 AM                           Permalink
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You could get an Odyessy battery, I've got one on my
GT6(see avatar)& after standing from November to April
in
a dry, but cold, storage facility it started first
swing.
Expensive, but for piece of mind & a definate start I
don't think you can do better, also they don't spill if
knocked over I know 'cos it's happened! For further
details try www.odysseybatteriesonline.co.uk
No connection to any supplier, except as a very
satisfied, & surprised, customer.

This message was edited by 555tcv on Apr-28-11 @ 12:44 PM

VetChugger
Apr-28-2011 @ 10:55 AM                           Permalink
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Slight spelling error!

http://www.odysseybatteriesonline.co.uk/

Trevor

www.normanboats.co.uk


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