I had an interesting experience departing Pooncarrie at Easter. It was quite hot and it was awfully bumpy so I climbed through the inversion to 7500' ...the AUSTER has an 0-320...full rich.
I had switched to the belly tank when the engine started to lose power so I turned on the electric pump but got no real improvement. Went back to the main and the power loss got worse. The engine sounded like my old FJ with the choke right out.
I started through the rest of FCMOST and leaned the mixture...instant return to normal. Never had it do that on climb before so learned something new.
Kaz