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Gentleman and ladies
I have a 1968 PA-28 140, with a 0-320 E2A, Ram conversion to 160 H.P. 250.hrs with new slick mags at the time of O.H. Here is the problem, when I do a Mag check (on the Right Mag ) it will run slightly rough go back to both and then back to the right mag it will always run fine. Out of a dozen flights this might only happen 3 out of the 12 times, it only does it after after the engine is warm never cold.
We have pulled the plugs and there is no lead deposits, looking for some ideas, might have to send the mag out to have someone take a look or rebuild it.
Thank you in advance
 

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