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TBO Advisor recommends the peak EGT method of leaning for the O-470 series
(except O-470-U), but it also warns that "In some engines, such as the O-470-R, it may not be possible to operate smoothly at peak EGT (when EGT is measured from a single probe that averages one bank of cylinders), since mixture maldistribution can cause lean misfire to appear in the leanest cylinders before peak EGT for the engine-as-a-whole has been reached." It also says that running at peak EGT also means that detonation protection is at its lowest. What does your POH say? Continental does not recommend leaning to peak EGT at settings above 65% power for normally-aspirated engines. "Jeffrey" wrote in message . com... Greeting to all; I own a 1964 Cessna 182 with a Continental O-470-R25 engine. This is equipped with an E.I. 6 pt EGT gauge. Typical cruise power setting is 20" manifold pressure 2300 RPM. I seem to have a plug fouling issue. Can someone please give me the proper leaning procedure for both cruise flight and ground operations (taxing)? I'd really appreciate some experienced input. Thanks in advance! Jeffrey |
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