RE: Smoke in the Turbine duct P-80
Hi there
Might be a silly question, but is it facing into wind when you shut it down?
Every turbine I've known, will smoke out the front during shut-down, if it is facing the wrong way.
The next problem you'll get, if you continue, will be the starter slipping due to oil residue on the O-ring.
Seen it, done it.
Eric