Thanks crumpy,yes this mower is making me grumpy.Yeah it did run from primer hole but as i say a small tap on carby and it stopped ,havent check the tank yet but its fairly full of fresh fuel mix, ,but with the motor running set fuel tap full on motor stops fuel on high the mower then stops then i have turn off fuel and crank it until it starts then i turn on fuel about a 1/3 of the way on to keep mower going too much tap or too little and it will stop again