Cycling the prop on piston planes?

Question

When you are on run-up what would happen if you brought the prop to full-feather and didn't advance it back to fire-wall forward? Obviously nothing good. (Typical run-up with power at 1700 RPM)

Answer 1

The propeller turns more slowly, but it doesn't stop.  --No harm done.  An engine can be started, too,  with the propeller feathered.

Answer 2

Almost guanteed,  the engine will stall out, and then you would have to move the prop forward while turning over the engine with the starter to get the props out of feather..

Answer 3

Just a guess, but if you were in a twin engine with a full feathering prop, the engine would either stall or overheat.

Answer 4

It might stall out the engine, but most likely it would just bog it down.

I had to start a piston engine on the ground in feather once.  The student forgot to set fine pitch on landing and shut down and the low pitch stops didn't engage.  The spring and nitrogen put it to feather as soon as the engine stopped.  

It took quite a few tries and four letter words to get the engine started so the prop could go into fine pitch again.