Effect of suction on DG

In the last couple of months we have replaced both vacuum instruments (DG
and AI) as well as all vacuum hoses.

Immediately after this was done, I noticed our suction was lower than
before. It would top out in the 4.8 region -- at the very low end of the
acceptable scale.

At the same time we also noticed that our newly overhauled DG was precessing
excessively. It would precess 10 degrees every 15 minutes or so. Sometimes
less.

Before we pulled and returned the DG, I wanted to make sure that the lower
suction wasn't part of the problem, so today I had my A&P adjust the vacuum
regulator. It's now reading 5 at 2000 rpm, and almost 5.2 (the high end of
acceptable) at full throttle in a ground run. We left it at the high
setting to see where it settles out after a flight or two.

Question: Will this increase in vacuum help the DG's precession problem, or
is the DG toast?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"