T&T: 4D battery bank vs. 4 6v golf cart batteries

[Scott F. Larcher]

Hello All,

I own a 35' MT Sundeck powered by a 135hp Ford Lehman.? I have always had a battery system of two 4D batteries used to both start the engine and to provide house power.? It is time to replace these batteries and I am contemplating going to 4 golf cart batteries aligned in a serial and parallel configuration.? I have several questions that I hope you folks can answer:

1.? Is this even a good idea?? My major concern is will four 6v batteries provide cranking power for my FL135?

2.? Has anybody done this (I know the answer to that!)? When you did this, which batteries did you use and has it provided the power that you expected?

3.? Do you feel any cost differences are significant and if so, worth the difference.

I would appreciate anyone with any experience going this route to please contact me. 

Thanks in advance,

Scott Larcher
Il Bello Mare
Northwest Creek Marina, New Bern, NC