many thanks to all those who replied.the info helped me in the diagnosis and narrowing down of the multiple problems with this motor.its starting now for around 2 seconds.to start however i must previously tilt the machine in the plane of the float.
that is when i see fuel moving through the pipe into the carb. a sunk float i can understand stuck in the lower position, but a levitating float?when i cleaned carb and blowed through carb gas inlet pipe it float seemed free enough to move. i even removed the float pivot axle and cleaned it.
ever happen to you? i will try working the float up and down by hand to make it even lighter to movement.