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I have twin 2003 150 ficht motors and the port engine is consuming approximately 1/3 more oil than the starboard. I have checked the check valve and it appears to be opperatig properly. I have checked for fuel leaks and there is no visible sign. People have told me it could be the oil pump. Pump is obviously pumping oil, so it is hard for me to believe, but I'm no expert. I've asked around to see if there is a way to test the oil pump ***embly with no results. This part is extremely expensive between 800-1,000, depending on vendors. Does anyone know of a way to check if the oil pump ***embly to see if this could be the problem or is there a single component I can replace on the ***embly rather than buying a whole new one. Or, does anyone know of another solution to my oil consumption broblem.