Huh?
My old Poulan Pro after more than a year sitting in a tool shed started
with less than 5 pulls.

Is this with more than a year old gas too?

From one extreme my Echo doesn't care if the gas is over a year old (two to
three pulls!) to my 80cc Husqvarna that won't start if gas is over 60 days
old.

I think the Poulan Pro share some parts with Husqvarna.