Two stroke with no spark. Reply to Adam and thanks?

Hi,
Thanks for the advice.
I have replaced the spark plug and now get a spark.

Now I have a new problem!!
When I start it it runs at slow tick over but as soon at I open the throttle it cuts out.
It sounds like it could be a fuel supply problem and I can see on the carb only an adjustemnt screw for slow running, there is two other what look like like adjusing screws but I am not able to move these.
Can any one help, is it possible to e-mail me an instruction / service manual??
I know this is an old model engine but I would think that McCulloch would have used this design of two stroke engine on many later and possibly current tool systems.

Regards
Bill