The choke on this unit is always partially om when running. Is there an adjustment for this. It is a Craftsman push mower with the "never add oil" model 104m020009f1.
first be sure the thermostat is opening all the way up,if i remember right, the thermostat rotates towards the left when it opens the choke.
I'll probably get yelled at, but you might put a small bend in the choke link to take up any slack and pull the choke open more...