Sounds like a bad switch box.-----There are of them.----You could test by swapping them and see if there is no spark on 1 , 3 and 5 and spark on 2 , 4 and 6.
There is a spring affair on the choke linkages.----A much mis-understood item.-----Maybe a previous owner was baffled by it and hooked it up wrong.----Remember we can not see , hear or feel your motor !
???-----This motor just has a simple choke set up-----Closed or open only.-----No fancy adjustments of any kind !!----These carburetors do not have idle mixture screws either !