I have learned lots from reading this forum as a first time owner of an exmark. I found several places that sort of address my problem but none in the detail needed ... throttle adjustment? The Throttle on my LZ23 kx604 keeps slowing down as I mow. It works fine manually but when mowing it just edges back toward idle. Hoping for an easy fix by doing a throttle adjustment but not sure how to do that ... assume I know nothing about mechanical things. 
but am trying to learn! Thanks!
but am trying to learn! Thanks!