Working on installing the regulator and battery switches for Rutu. The
complicating factor is that I have a BIG Leece-Neville charging the house
bank and the stock Yanmar alternator charging the starter battery. There
are two battery switches. A straight on/off at the house bank and a
1/2/Both at the engine.

The 1/2/Both switch has a field disconnect feature to prevent damage if it
is operated with the alternator running but in the normal arrangement
switching the hot side it only works for one alternator. The Leece-Neville
is externally regulated but the stock alternator in internally regulated.
I am thinking that by switching the field ground rather than the hot side I
could get it to work for both. The LN is not a problem because I know how
it is wired but I can't figure out how the stock Yanmar field is grounded.
The Yanmar installation manual doesn't mention the alternator wiring.

Is there a way to bring the field ground on a stock Yanmar alternator out to
a switch?

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com