MVVS 58 idle problem
I've got about 15 flights on my 1/3 Laser powered by a MVVS 58 and can't seem to get the idle right .Initially on the ground and about half way through a basic IMAC run it runs great .It is rich on the low end(2 1/2 turns) and 1 1/2 out on the high end.After about 2 minutes flying the idle stays high like in a lean condition and it doesn't come down until I trim back 5-8 clicks then it wants to quit.The carb is vented out side the cowl and there is lots of vents around the engine box.Do I richen up the low end more?Any ideas welcome.