Thanks Bruce.I got under her today and dropped the deck off.
Everything looked like it was in place,the only thing that looked wrong was that there was not enough "pre-tension" on the engine belt.This was causing the clutch pedal to sit low and letting the belt slip but enough to drive for a while.Now adjusted the pedal sits high and it disengages drive half way down.
Hope that's all it was.
Thanks for your help


Husqvarana Rider 155 ‘keep her cuttin’