Thanks for the replies. I have fixed the problem without the need to cut down the output shaft of the engine.
I checked out a spare clutch shaft (from my spare parts) and found that it is 10mm shorter than the one that I used, I swapped them over and I now have an operating clutch.
Another example of where asking questions on a forum like this one creates information and allows you to search for answers and learn more about a subject.
Thanks
Malcolm.
