Pre -FL 3.0 no start..

[philhoward]

It lives!

Drained the tank, flushed the lines out, swapped the filter and after plenty of cranking it finally fired up!

I reckon there was a good couple of litres of "milk" floating about, either in the tank, the swirl pot, the filter or the lines.

Many thanks for all your assistance along the way.

[Bojan]

Glad that you have sorted this out. 
Really a unusual one.