I fly an acclaim type S, and have what appears to be an incorrect manifold pressure indication. I believe it to be about 5 inches or so off. For example, in order to get the correct fuel burn and knots for a 2400/ 21inch setting, I have to obtain a 2400/ 27 inch setting, at which point the fuel burn and TAS are almost dead on for 24 squared. Anyone else ever have this issue?
thanks