I have a 2008 Yamaha fx 1000 Mr1 with a bad oil leak. It is not from over filling and is not from faulty filter. Last week I found massive amount of oil in hull. I removed all oil from inside and ended up adding 2&1/2 quarts back to motor. Ran for approx 10 mins and oil in hull again, so much that the bilge pump cut on. Approx 1&1/2 quarts. Ski has 140 hrs on it. Where could this massive leak come from????