Black soot ok plugs

Are the temperatures getting colder there? (Sorry, I don't know where 'sgv' is...) It may just be the choke working in the cold temps.

By the way, look up 'wet float setting' for your 1920 carb. That is the most accruate way to check the float setting. But your spark plug color sounds good.

Yea it's San Gabriel valley basically low Angeles. The coldest is getting here is about 43F . I actually don't have the choke hooked up I have to adjust it and compensate for the 1 inch difference . I have a 170 in a 72 valiant. Never had a 170 choke the one I have now was for the 225. I just gotta snip about an inch off the rod of the choke that connects in the carb . Hopefully that works. I'll look at the wet float setting again and tinker with it