I agree. Will (most likely) be revising my startup routine to have mixture rich, pump on for a second or two, mixture lean, then start as normal. That seems to be the way I remember doing it. Part of my thinking has to do with the number of seconds to prime at various temps. Seems at 90 degrees (F) it would not apply, but in real life does. I don't recall ever flying when it was cold, but sure I did (not as cold as some deal with) & priming engine was always the same regardless of temp.Piper_EEWL wrote: Well the mixture has to be rich in order to allow fuel flow to the engine. If the mixture is at full lean you won't allow fuel to flow to the engine so you can turn the fuel pump on as long as you want and you won't prime the engine a bit. At least in the fuel injected Lycoming Cessnas.
Sure do love my 172!
TB2