"Guy Byars" wrote:

If you are planning to use it to lean more agressively on a carburated
engine, then I agree, it will not work well for that.

Depends on the engine.

I use my EDM-700 for leaning my O-360 every time I fly. While climbing, I
use to monitor CHT's so I can lean without overheating. In cruise, I've
used it to find the "sweet spots" where I can run LOP at various altitudes.


put an EDM-700 on my Skylane with an O-470R. I still find the best
leaning procedure is to lean until the engine is slightly rough, then
richen it up 1/4 turn.

Yes; O-470s are notorious for uneven mixture distribution.


However, an analyizer is a great diagnostic tool. For example, if on
runup you notice one mag is slightly rough, a quick look at the analyzer
help you diagnose the problem. For example, if a single cylinder is not
firing, the analyzer will tell you EXACTLY which cylinder has the bad
plug. Or if all the cylinders are sick on one mag, then the analyizer
will clearly show that too. Also, earlier this year, I had a manifold
leak, and saw that the 1-3-5 cylinders were a bit "off". So an inspection
of that side of the engine found a manifold leak.

Yep. I'd hate to do without it.

--
Dan
C172RG at BFM