Hello Paul-

We got a free lesson in electromagnetics today.  After I emailed
yesterday,
we went to run the engine again & it ran terrible!  Terry had diddled with
some of the computer settings, so we thought perhaps we'd screwed
something
up.  We reviewed the settings & discoverered the EC2 tach setting was way
off -- 572 vs the not-to-be-changed value of 515.  Terry fired up again &
all seemed well.

Until... I noticed the EM2 reporting continually decreasing line
voltages...

I looked at the switch panel, and saw we had the externally-regulated
alternator off-line.  I flicked it back online... and... disaster.
Suddenly
the engine was trying desperately to stop & could not be adjusted to run
smoothly.  Flicking the alternator off resulted in fairly smooth running.
Every time the alternator was brought on line, the engine went bananas.
As
soon as it went off line, the engine became much smoother.

Here's a test for the group:  Why is this happening?  Here's an old photo
which pinpoints the problem for those with sharp eyes...

Mark (Rocky Mtn High)


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The alternator wire (output) bundled with the CAS wires

Rino