Well pull it apart and was a little bit of rubber arouns the pulley which may of been from the new belts. Cleaned it up and lubed the centre post so it can slide up and down. Then checked the 2 bearings where the pulley shaft goes into. Top one had a fair bit of dirt build up on. Cleaned them and stuck bearing oil on them. Started it up and ran fine. Thanks so much, will probably get a new pulley eventually but only own a acre block and pretty much all flat ground.
