Originally Posted by
Centaurus
On the other hand to be fair, students and their instructors can only glean this information if they can find it from the appropriate aircraft maintenance manual. They could search around for a local LAME to obtain his opinion but how do they know he is correct or merely offering his opinion
You can glean this information from opening the engine cowlings and following the throttle / mixture cables to the pulleys they're connected to.
It surprises me a little that the mixture is not spring-loaded to full rich...