No, I think a short between P leads would kill the engine when put in either the
L
or the R position. Grounding the P lead kills that mag, an open circuit lets
the mag
run. If you had a short, then grounding either mag would ground both.

The problem is either a defective mag switch such that neither the L or R
positions
ground the respective mag, or the timing is way off.

Art wrote:


Another possible failure mode could be a short between the Right and Left P
leads but not to ground.



--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759