Because I cant pull up my original message I will let you know our half power problem was resolved. Because i know nothing about diesel engines and because this boat is new to us, i found a diesel mechanic to stop down and fix our problem. He went over the lines, tightened a couple , then changed two filters and also pulled the pickup tube in the tank and we are back in business. He then spent some time showing me how to bleed the engine and a few other things i should know. It was educational and I now carry two extra belts, extra impellers, and two extra filters and have gained some knowledge I did not have on friday. We motored up to 7 knots and it ran great all weekend. Hope that keeps up.