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Old 02-28-2021, 08:25 AM
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Art_N412SB Art_N412SB is offline
Join Date: Sep 2017
Location: Gig Harbor
Posts: 38

Originally Posted by seagull View Post
trecool44, The front cylinders do not get the same mixture as the rear cylinders because of the longer intake manifold.
We have been having the same rough running issues. We were wondering why the plugs on our front cylinders were black and the aft cylinder plugs were clean. We did not realize that the front cylinders have a different fuel/air ratio due to their longer manifold distance. Thanks
Art Tiller
Pacific Northwest
RV-12 Owner
UH1H VN 1972
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