In article .com, "Robert M. Gary" wrote:

Paul Smedshammer wrote:
This is a bit long winded but I'm looking for qualified opinions as
to what
might have happed to an almost total loss of power while in cruise
flight in
my Mooney M20F. Here is the story of what happened:

I also own an M20F. Did you have teh ram air on? There are cases of ice
build up when the ram air is on. The owner's manual cautions us to turn
it off in ice conditions.

Have you checked your fuel vents? There have been reports of Mooneys
lossing power after fuel vent blocks. However, changing tanks should
fix that.

The Mooney does have an automatic alternate air system. At annual, the
automatic switching door should be inspected and the spring pressure
should be measured.

-Robert, M20F

When this happened I had the power boost off. As one of the trouble shooting
items I opened it and got a slight increase in power like from 30% to 35%.
Hard to judge but it was running extremely rough and opening the power boost
cleaned it up just a little bit. I left it open as it did make things just a
little better. But it was the enriching of the mixture that really made the
difference. Still less than 50% power but it at least ran smoother.

By the way, I LOVE this plane. It is old but it fly's great and I feel the
most comfortable I have ever felt in about 7 different planes types (152, 172,
172RG, 182, Debonair, Warrior, and Arrow). The Mooney just has the
performance I have always been wanting. It is a great plane... as long as the
engine keeps running!

Paul, 1967 M20F