On 26 January 2018 at 03:06 "'Bill & Judy Rouse' yahoogroups@... [amelyachtowners]" <amelyachtowners@...> wrote:
I don't know the ratio of RPM ftom the alternator to the engine, but as I recall it, I would guess about 3:1. If it is 3:1 the alternator would turn at 1800 when the engine is at 600.
Regardless of the ratio, I believe yours should excite when the engine starts. I had that same alternator for 11 years. My engine idled at about 600 RPM. The alternator would excite as soon as the engine started. The one time that it didn't, I had an alarm and red light on the 24 Volt panel. My issue was a loose wire connection on the alternator excite relay, which I described in an earlier email.
BTW, the alternator would not put out much amperage until the engine RPM was more than about 1400.
I hope this helps you and you get it resolved.
CW Bill Rouse
Admiral, Texas Navy
Amel School www.amelschool.com
720 Winnie St
Galveston Island, TX 77550