Incipient rich cut?
Wouldn't mind some advice please.
Cruising today at about 9,000 feet in the Alps at 2400 rpm (Lycoming 0-320), hot day, and thinking 'F*ckin' ell it's high up here', then initiated descent and forgot to put the mixture to rich. Got down to about 6,500 feet and realised the error, so put the mixture to full rich, whereupon coughing and rpm fluctuations from 2000 to 2400 (QDM heartrate stable however at 180). Opening the throttle made it worse and it was only cured by selecting carb heat cold.
Was this due to a sudden overrich mixture, exacerbated by the carb heat hot?
Have flown a further 1.5 hours today and had no problems witt he engine.
Thanks for any input,
David