2 outboards - 1 starter battery?

[Wrighty]

I am just starting the electrical fit out on my yacht. There are 2 Yamaha 9.9 outboards. Can anyone advise if these can be directly coupled to a single starter battery? I am then looking at a second battery for domestic use which would be the back up starter battery if required.

 

[JRJ]

Re: 2 outboards - 1 starter battery?

Could be done, but why? If you're gonna have two batts, then running everything through an on/off batt 1, batt 2 or both selector makes more sense to me.

 

[Wrighty]

Re: 2 outboards - 1 starter battery?

Could be done, but why? If you're gonna have two batts, then running everything through an on/off batt 1, batt 2 or both selector makes more sense to me.

I see where your coming from! So, with 1 batt as dedicated starter and 1 as dedicated domestic, would I still be able to couple on a basic switch to the 2 engines? Do you know of any diags on the web? Thanks, Steve.

 

[JRJ]

Re: 2 outboards - 1 starter battery?

No, but seems like there is a lot of info on the electrical forum here at iboats. Good luck.