Talked to a mechanic mate and he warned about most pumps have a hidden internal fuel filter.
The pump makes funny noises when hot so I got a new pump just in case.
So out with the pump again. Well I found the internal filter.
See the filter down the hole on the side?
Flushed it out with carb cleaner and flushed out LOTS of black crap.
This is some of it, I collected a jar full of it before it came clean. I flushed it back and forth many times helping it with a bit of compressed air.
While in there I figured I might as well fit the new pump and strainer on the bottom.
HOWEVER I forgot to remove the pump to tank o-ring before washing so now it has expanded so it doesn't fit. :-(
More parts....