10-08-2018, 02:46 PM
Zenith's can be so damned complicated.
As I see it at the throttle edge there is an outlet which breaks into the slow running passage.
When the throttle is opened from idle it gives an additional mixture to allow smooth getaway from slow running. This area is termed the " progression jet " but I have to confess I've never investigated it. I had thought it was of fixed value to all 30 & 36 series Zeniths. Perhaps not!
As I see it at the throttle edge there is an outlet which breaks into the slow running passage.
When the throttle is opened from idle it gives an additional mixture to allow smooth getaway from slow running. This area is termed the " progression jet " but I have to confess I've never investigated it. I had thought it was of fixed value to all 30 & 36 series Zeniths. Perhaps not!