Eng. start battery

[Csail]

Should i replace the battery with the type suggested by the engine supplier or get the biggest that will fit in the box? (Motorsailer with inbd. 40hp diesel charging from alternator & aero4gen with x split.)

 

[Phoenix of Hamble]

IMHO, the bigger the better.... might just need it one day to crank it when hard to start, or after bleeding, etc etc

 

[fireball]

Also depends what you have in the way of leisure batteries ... and their ability to crank the engine ...

 

[Csail]

I think bigger the better.... there are jump leads to take power from domestics if need be, but they are 'domestics' !..not starters. Pretty good though..we have had her six years now and used regularly so not bad life. Lucas again i think.

 

[ccscott49]

Fill the box! More AH the better, never know when you may need them!

 

[bdsweeting]

Yes, fill the box but make sure that the new battery has good cranking power and not just storage capacity.

 

[William_H]

Of the course the actual figures will tell but it seems to me that Quoting CCA cold cranking amps for a small starting battery is fine but for a big leisure battery being big it will provide a lot of CCA (just not a lot compared to its size)
Don't forget that you have to be able to lift the blighter into the boat and into the box otherwise big is beautiful. If you feel like spending the cash. olewill