October 19th, 2016, 09:09 AM
Joined: Nov 2001
From: Ely, England
yes this is true. it has a bigger effect if you turn the screw in of making it rich at off idle speed.
if you have a climbing graph and it stops at 3 across and 3 up then turning the screw in will make it say plateau at 2 up and stay there across to 3. at 3 it changes to the needle.