Dukes 3331- Fuel Screen Part Number

[BlueMoon]

We are working to restore a 1970 M20C that has been sitting for several years.  The fuel selector screen is shot because there was water sitting in the strainer. We ordered a 10543-1 replacement screen from Aircraft Spruce, but the inner diameter of the screen appears to be too small. The package has both 10543-1 and 10543-2 part numbers on it.  Did I get the improper screen or is the new screen a really tight fit?

[Vance Harral]

It's a pretty tight fit, but hard to say whether you got the wrong part without pictures.  All I can say is that when I've replaced that screen, the inner diameter portion of the screen always winds up slightly "flared" after pressing it around the structure of the selector.

[tankertoad]

I am also having trouble sourcing this screen. In the past, the part # was 10543-1 and the inner diameter was larger. Now Spruce has it listed as 10543-2 (mfr#) and 10543-1 (Spruce Part#) that has a .50" inner diameter, which I think is the 10543-2.  The real McCoy (10543-1) can't be found anywhere. I think the supplier made the change/mistake. I called Spruce: they have no clue. I called Lasar and it sounds like they are able to source it by modifying the screen with the smaller inner diameter to a larger diameter that correctly fits the Dukes 3331 gascolator. @Alan Fox they are backordered, but they have my request to get a couple sent out as soon as they get them. 

Edited August 9 by tankertoad