to release the clutch cone you need to spray the join with crc etc, and using a crowbar or something force it between the gap between the engine and the clutch cone.
My clutch cone was stuck to the engine so i hit it with a hammer and a piece of wood, and jimmyed it off with an adjustable wrench as a lever.
You could also take the clutch cone apart so that you can spray the inside of it with crc to loosen it up, but you'd have to remove the chain cover and the chains etc.
just be careful either way, because you will have to remove the engine to get the clucth cone off fully.
the mower looks really sweet done up too, ive just finished resotring mine, and wil post pics of it later this week
