Engine Slow Idle RPM

[cambre]

Hi everyone. The factory setting on my Grasshopper 725DT seems to idle to fast to suit me. It has 498hrs on it and I think idle RPMs went up after it broke in. I don't like this when its cold. Would it hurt anything to slow the idle down and how do you do it? Thanks

 

[mechanic mark]

http://waterax.com/downloads/OWNERS_MANUAL/Kubota_D902_manual.pdf be sure to check out throttle return assembly completely, is return spring stretched or distorted?