CA erratic spark

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   I have noticed our CA has a slight "rough idle," and is also a bit "rough at full throttle."  I adjusted the jet screw and it was a bit better at an idle, but still overall not a "smooth running engine" at an idle and at a full throttle.

Thus, thinking about this thread, I added a slight choke and it smoothed out at both an idle and full throttle. Thus, not enough fuel!!  Agree???

I am now thinking...... I need to enlarge the main jet bore size such that I do not need to choke it (albeit, a bit of choke is easy to do!).

Dan

Edited by CA13414 - 12 hours 30 minutes ago at 8:14pm

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CA13414 Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 25 Feb 2024 Location: Nebraska Points: 373	Post Options Post Reply Quote CA13414 Report Post Thanks(0) Quote Reply Posted: 12 hours 43 minutes ago at 8:01pm
	I have noticed our CA has a slight "rough idle," and is also a bit "rough at full throttle." I adjusted the jet screw and it was a bit better at an idle, but still overall not a "smooth running engine" at an idle and at a full throttle. Thus, thinking about this thread, I added a slight choke and it smoothed out at both an idle and full throttle. Thus, not enough fuel!! Agree??? I am now thinking...... I need to enlarge the main jet bore size such that I do not need to choke it (albeit, a bit of choke is easy to do!). Dan Edited by CA13414 - 12 hours 30 minutes ago at 8:14pm
	Helping the aged survive and thrive! 1953 CA

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CA13414 Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 25 Feb 2024 Location: Nebraska Points: 373	Post Options Post Reply Quote CA13414 Report Post Thanks(0) Quote Reply Posted: 12 hours 25 minutes ago at 8:19pm
	However, with all the trouble you are having with your carbs and modifications, I am hesitant to modify our CA. However, I have no doubt you and Les Kerf will solve your issue! Then maybe I will modify my CA carb...?? Dan Edited by CA13414 - 12 hours 23 minutes ago at 8:21pm
	Helping the aged survive and thrive! 1953 CA