I have picked up an 043 MPS to replace the one that holds no vacuum. I put a vacuum gauge on it and brought it up to 15 hg. Here's how it went as it leaked down:
Vacuum Time
15 0:00
14 2:20
13 4:45
12 7:20
11 10:15
10 13:15
So it took over 13 minutes to leak down from 15 to 10. Will this work?