HI, I've cleaned the carb and freed the slide which was sticking.  Spark looks strong but appears to be flooding as its wet when i pull it out.   It wasnt running well before i cleaned the carb, it seemed to kick back a bit and would start but only for a moment.

I was thinking the woodruff key may have sheared.

 

Any advice welcome.

 

It does sound like the key's sheared.

An easy investigation and fix if it is. 

Thanks, ill check it tommorow if i have a suitable puller amongst the collection.

Thanks for all the advice reset timing, points and earth and its away!!