After market battery isolator question

[fishingwithblue]

I'm flipping through the manuel on my Evenrude 200hp 2004 year outboard and in the battery section is says to never install an after market batt isolator. It goes on to say it has a feature that can charge the cranking and acess. batt at the same time. It doesn't say what could result if I did. Any advice? Is this kinda like when they say only use Evenrude oil or could I mess the engine up installing the BlueSeas add a battery system?

[whatknot]

Blue,

Call Blue sea systems tech support.

[randlemanboater]

I guess it would be possible to burn up the alternator if both batteries were really low and pulled a lot of amps at the same time. But I would think that would be rare.

[phatdaddy]

might be referring to shutting the iso switch to the off position while engine is running?

[cterrebonne]

2004 200 DI?
i will have to check tomorow at work to see if those has the rec/reg built in the emm or if its stand alone. but as i recall omc made a battery isolator like the blue sea. word of advice if the rec/reg is in the emm there are expensive to replace.

[THEFERMANATOR]

You don't want to run an isolator on any magneto system. An isolator loses .8 volts through the diodes, and they provide no direct battery condition to dampen the AC current spike that magneto charging systems put out. If your going to run one, make certain that it is meant for it. I personally just use a battery switch.