Field Disconnect with unregulated Alternators

[raf235]

Hi<br /><br />I've got a 1989 Evinrude 40hp VRO which looks like it has the CD2 unregulated 4amp alternator.<br /><br />I'm rewiring the boat with two batteries via a Perko battery selector switch with the field disconnect contacts (in case it gets switched off while th engine's running).<br /><br />As there is no regulator, do I need to bother with the field disconnect ? If the battery was disconnected at either high or low engine revs, would there be a volatge spike that could damage the other electrics ?<br /><br />Thanks for all the help I've had in the past through this excellent forum.....<br /><br />Paul

 

[clanton]

Re: Field Disconnect with unregulated Alternators

No field to disconnect on this engine, the field is a set of magnets.

 

[raf235]

Re: Field Disconnect with unregulated Alternators

Hi<br />Thanks for the quick reply, I had just checked the engine, and you're right, it's got an unregulated alternator. I then edited my question before seeing your reply !<br />So if the battery was disconnected while running, would there be a damaging voltage spike ? I guess not, but I'd just like to confirm it with more knowledgable people than myself... <br />Paul