Some, if not all versions of the Muir repair manual recommend disabling the choke in order to save fuel.
My thoughts on that:
1) with the engine cold, you end up blipping teh throttle with your foot to keep it running. The accelerator jets squirts raw gasoline into the intake manifold each time, and thus you get a "pulsating" VERY rich condition accompanied by a sudden rise (and fall) in engine RPM. In my opinion it would be much better to have a steady, choke assisted idle. You even SAVE FUEL this way.2) disabling the choke mechanism by "wiring it open" and maybe disconnecting the choke wire (You should), will render the choke mechanism motionless. While this may be "okay" for the hot summer months, you may have a stuck or poorly moving choke components come wintertime, when you need it the next time. IMHO, it's better to leave the system intact and keep the parts moving as they are intended
3) The "automatic" choke really isn't *all* automatic. YOu are supposed to ADJUST IT twice a year, different position for the summer and winter months. The choke element (round cylindrical thing on the right side of the carb, with a wire connector sticking out the middle) is secured in place with three small screws (slot head). Loosen all screws enough so you can rotate the choke element, and turn it clockwise or counterclockwise to adjust the choke. If you had the aircleaner off, and held the throttle open, you would see the choke plate move as you turn the choke element back and forth. Adjust it to where you want it, with the engine COLD. Experiment a couple of times with different settings until you get it to where you like it best. Allow the engine to cool off completely between sessions. (like, overnight). Tighten the screws up and forget about it for another 6 months or whatever.Jan