Originally Posted By rcmatt
which Walbro pump model?


The preferred alternative is the Walbro GSS342

You'll also need:

Convoluted pump hose heat-shrink 210mm: PFH0825 (for GSS342)
Pump wire loom: 22-615 (for GSS342)
Pump rubber foot 22-63 (for GSS342)

It's detailed in the Alternative Parts List, superbly managed by Planenut:

https://www.dropbox.com/s/gbrfaonbh9xqwan/Updated%20list%20250119.pdf?dl=0

The full thread:

http://www.talkmorgan.com/ubbthreads.php/topics/556001/Re:_M3W_alternative_parts_list#Post556001

Red Leader drive