Diesels smoke when the fuel isn't completely burned. A freezing cold injected diesel will throw white smoke like crazy if glow plugs or air heater doesn't work. This is actually fuel vapor. I had similar smoke with my FS40 early on before I figured out it was so rich that only the excessive compression kept it running.

The Enya 41-4CD doesn't have compression adjustment as far as I know. Mine is here but I have not picked picked it up yet. He is elduing to the idea used on this engine.

http://modellmotoren.homepage.t-onli...VT1D-engl.html

The crank runs in an eccentric which the lever rotates to adjust crank centerline distance to the head for compression adjustment.

Greg