Hi LRT
Many thanks for the images and comments.
These diaphragms were certainly used on B&S 8, 10, and 13 Series engines.
They were a Code 1 part - meaning, they were required in any general
overhaul of these clever carburetors.
As you and beantin have said: the diaphragm and gaskets are part of
any service on these carbies.
After diagnosis of fuel problems, the diaphragm was the first port of call
after contaminated fuel.
Cheers
--------------------
Jack
