" jls" wrote in message ...
"Dan Thomas" wrote in message
om...
And you know something else? I don't know how many Slick mags I have
found
on airplanes with the cap backing off the mag because one or more of
the
screws has backed out and fallen out of it. It's happened to me with
my
personal aircraft twice.

We have those mags on five airplanes, and the screws have never
backed out on any of them in the eight years I have been looking after
them. These mags fly 3000-4000 hours a year between them.
OTOH, the dual Bendix mag on the R182 is a positive pain in the
%^%#$@!

Dan

Ah, OK, Dan, to be fair with Slick and Unison, I will have to say that we
got the harness repaired yesterday and most of it was needing cleaning.
Apparently there was an almost invisible carbon track on a cigarette and a
little carbon on the distributor cap. Afterwards, the engine ran smooth as
silk.

But as for those screws that back out, the news spread, two or three people
got nervous about theirs and sure enough they found some loose and one of
three screws backed completely out and gone.

You may have plenty of space at the back of the mags where you or your
mechanics can get a screwdriver in there and do some serious torquing. On
an aircraft where the fit is close, it is more difficult to tighten the
screw. I remember one where all the screws but one were gone and the third
was loose: the only thing holding the harness to the mag was the tight
space.

Blue Loctite maybe?

Purple is better for small screws (Loctite 222). Not so strong as
to make removal difficult.

As for Unison's offer to give advice at its website, my experience says that
THAT is worthless as the teats on a boar hog. The last time I asked for a
little tech help I got an e-mail after a couple of days wait and a number to
call some chap in Jacksonville. All I could get was his voice-mail. So I
gave up.

Don't get me started on their damn sparkplugs. It doesn't take them long
before they are rusty.

I'm going to get you started. We find Unisons outperform and
outlast Champions by a wide margin. Champion has a spring-loaded
resistor in their plug that seems to lose contact after a while, and
internal arcing reduces spark strength. Unison's (Auburn's old design)
has a molded-in resistor that gives no trouble at all. We won't use
Champs unless forced to.

Dan