IO540...
Im not an engineer or an engine boff; however I probs did use the wrong terminology but on the CAP10c; when doing the mag checks, if there is a large drop or drop difference we have to lean the mixture on that mag or at both then try again and it always solves the problem.
On t'other type I fly, we set the mixture as part of the after start checks (Setting best power mixture) so mag drop problems are rarely a problem.
