Hey there Tiger I dont want to but into this, But when you said this.
"I noticed though that the spindle holding the float came off easily. I had some brazing rod so i cut up a bit and its now a nice tight fit within the carby body."
That nice peice of brazing rod that is such a nice fit now, does the float pivot on it properly?
and by the way the "spindle" holding the float is not designed to be tight, the bowl on the carby holds it in.
Just my 2c worth, good luck.
Jonesy, don't consider this butting in if it helps. Actually cut up another bit of rod that wasn't such a tight fit, I've realised that the bowl does the job of holding it in. Unfortunately the mower still will not run for more than a few seconds at best.