Same thing, when I fit the motor it appeared to be perfect. Upon tightening the mesh was just to loose. Maybe I should've ground the brace, though it's only the fins in a small area. I've seen motors in worse condition sell in some if the Facebook groups so I'm not to worried about it. Also considered the 21T, but was in a hurry and ready to bash!
Got some little ramps from discountramps.com and was getting some decent air time until I landed on one wheel while on the throttle.
View attachment 946
ouch. ha ha, well if it's just the outdrive consider it a very cheap fix! could have been a heck of a lot worse, like bending a $50 set of universals...