Thanks EC121, thats one of the best explanations I have heard.
I took my plane to a mate who runs a small engine shop (lawn mowers etc) and he helped me to set it up so it runs right and showed me how to do it. One tip he did give me which works great was to use a squirt of aerostart to get the engine to fire. He said it will not harm the engine and it works great especially because I do not have an electric starter and have to use a chicken stick. The enigne fires after the first flick of the prop.

Regards,

Troy.