This heads-up is not the problem here, but I'll relate it while I am thinking of it. We had a cable yarder that would lose power intermittently. We looked everywhere - filters, water seperator, lines, return loop - no air etc. Just a lack of fuel. We looked in the tank and could see the intake screen - clear of debris. Problem persisted. Finally, we pulled the cleanout on the fuel tank to change the strainer. What we found was that someone had placed a Glad sandwich bag in the tank. The bag would float around and only cause a problem when over the intake. However, because it is clear, we could not see it when looking through the fuel. It almost drove us nuts. Keep your tanks locked.