With the BS34s on my old SH the temp had to be below about 8 - 12 Celsius to warrant full on choke. At 20 Celsius and above no choke was needed at all. I filed 2 extra groves in the choke connector rod so I had 4 choke settings for different temperature ranges. Full choke always ran the risk of a very hefty kickback so it was usually my last option if not starting after 2 kicks.
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