Quote:
Originally Posted by N427EF
Don't get too hasty boring out your carb jet.
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Agree. Big picture:
Sometimes it "cures" the problem, but consider engine fundamentals. A very rich mixture is just an expensive way to reduce power. Rated power, the horsepower you paid good money to buy, is found at best power mixture, 100 to 150 ROP for an NA Lycoming. That mixture also results in the highest CHT and oil temp, hardly a surprise.
Assume reasonable OAT, correct ignition timing, and normal combustion (no detonation or preignition). Cylinder or oil temperature outside limits at full power indicates a cooling design problem, or a cooling installation problem, or both. A power reduction, however accomplished, is just a crutch.