Lousy alternator on 40hp Johnson 1985

[Rotti]

Hello,<br />I got me such a motor together with my "new" used boat and have a question on it:<br />- Is there a way to install a better alternator, because it now squeezes out only 4 amps which is rather a bad joke than a charging system for my battery... double the amps and Im doing fine, maybe something from later year models of the same make would fit?<br /><br />Thanx already for any suggestions or tips!<br />Greetings from Germany,<br />Wolfgang

 

[Rotti]

Re: Lousy alternator on 40hp Johnson 1985

So I can interprete "all these many answers" as a no?

 

[R.Johnson]

Re: Lousy alternator on 40hp Johnson 1985

The 4 amp system is only mean't to maintain the cranking battery, which it will do. I don't know of any way to come up with any real meaningful large increase to run any high draw accessory. What do you want to run off your system?

 

[ED21]

Re: Lousy alternator on 40hp Johnson 1985

One thing you can do is install a deep cycle battery & run the accessories off of it. And then keep it charged when back home.<br />Check the FAQ for multiple wired batteries. You could at least put some charge back into access. battery when the starter battery is charged.