Part # I believe is 306 for Stewart Thermostat. Not readily available.

I cannot seem to get the six pack to run any other way but rich. Currently has a Murray 180 stat and plugs were Autolite 65s

Got the center carb mixture screws 2 turns out. 6 pack guide says 1/8 to 1/4 out on outboards but won’t work here. It won’t stay running if I do that.

Started with the outer carbs 1/4 out. Cranked but wouldn’t stay running. Before messing with anything as it was in a running but rich state, the mixture screws on the outboard carbs were between 1.5 and 2.5 turns out.

With this setting, The Autolite 65s were carbon fowled and wet on the outers. 1,2,7,8.

The one 66 in it was good with the rich mixture. That’s why I went with 66s.

Too hot of a plug? Any ideas?

Got it running with center 2 turns out, outboards 1 turn out and Autolite 66s. Exhaust smell is rich with 2, 1, and 1 but cranks right up and runs. Just stinks.