At 02:42 PM 3/23/2010, Dug Smith wrote:
>part numbers (211905351 and 191905351), and mine doesn't have anything
>listed on it.  Mine does have a heat sink though - is that the only
>difference between the two?

According to my reading, 211905351 was superceded in Feb '84 by
211905351D, which was in turn superceded (in Brazil) in 1992 by the
191905351B, and in the US in 1996 by nothing.  The current listing in
the catalog is for the 191.....B for all the Digijet engines.

The heat sink is a separate p/n; the controller is bolted to it with
M4x18 machine screws and spring washers.

As to the very confusing instructions about different types of module
on 28.37 -- I see no way of resolving that through Bentley or
Etka.  Absent some old hand who's familiar with the beasties, I think
it's fair to say that either +12 to pin 7 or ground to pin 7 should
give 12v on a good unit, and the other connection something near zero.

Yrs,
David