Hmmm! Sorry I am not sure I get it...
I had a spare injector, I installed one injector line to the pump, installed the injector on the other end. Bled the line, I held a small jar around the injector and cranked the engine.
I couldn't see any spray nor could I see any fuel in the jar. Led me to believe that there wasn't enough pressure from the injector pump.
Also called Kubota today and I was told that they had seen an increase of pump failure due to Bio blend fuel. I never used any bio diesel but apparently here in WA, all the diesel fuel has a 5% bio..
I have the pump going to a shop tomorrow for testing. I'll definitely let you know what they find out.
Once this thing is fixed I'll installed a different fuel filter as you suggested..:thumbsup: