Viperdoc wrote:
I've had two fuel servos repaired on two different engines- My impression is
that the parts are adjusted to insure adequate fuel flow, which is the
desired end result. I can not imagine how a spring would get stiffer with
time- perhaps the diaphragm became more compliant. Why not ask your mechanic
or the fuel shop?

Mechanic doesn't understand fuel servos (in fact, I've yet to ever find
an A&P who understands them from other than a theory point (since
they're aren't allowed to work on them anyway)). I got an anonymous
call from the fuel shop, I don't actually know who worked on it.
My real question is "is replacing the spring considered a repair issue
or an adjustment issue"?

-Robert