On 13 Dec 2004 15:10:43 -0800, "Robert M. Gary" wrote:

I had a plug go bad and that cylinder's EGT actually went up. I never
understood that.

That is what should happen. Has to do with flame fronts and burning time.

Assuming you have EGT monitors for each cylinder, watch what happens when
you do your mag check. EGT's in all cylinders will rise significantly.
AAMOF, that is one recommended method (in the Insight GEM manual) given for
checking.


Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)