We had been having a fuel starvation problem in the upper rpm ranges. I've been tinkering with fuel lines, filters, auxilary tanks and identified the problem to be with the engine. Took the intake off and was planning on getting into the vst and replacing the filter on the hp fuel pump. I also had the F-shaped filter which I planned to replace. Pulled the F-shaped filter between the lp pump and vst first. Inspection of that filter revealed the blockage. Don't know where all that crap came from, the lp pump I guess. We don't burn ethanol. Didn't see any need to get into the vst. Did a test run shortly after and was very pleased to have solved the fuel issue. Thought I would pass this on to those who might have a similar issue. Now I can get back to fishing!