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Old 03-10-2008
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Starting Battery - Yanmar 3GM

Folks,

Looking for advice on the SMALLEST size battery that can handle the starting loads of a Yanmar 3GM30F (3-cylinder diesel) engine.

I am confident that a Group 24 battery can do the job. But I would like to try a U-1 battery. A WM Group 24 (AGM) has 660 MCA, whereas the U-1 has 240 MCA. Would this be enough?

The reason I want to go smaller is that I have limited space, and also would like to save weight. Furthermore, we don't have a high-output alternator or smart regulator, so I don't want to create a bank of batteries that is too large for our charging system.

Many thanks in advance for your thoughts.
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