I have a 1991 Yamaha 225 TLRP outboard, and took it out then noticed an oil slick in the water when i stopped. I put it right back on the trailer and went home to see what was wrong. I cleaned up the oil then put muffs on it and started it. I looked around and saw oil coming from the overflow tube on oil tank on motor. I shut it off then turned the key on and could here the oil pump was on. then looked at the tube and oil was coming out of it. This is a motor with precision blend and i can't figure out why the motor won't shut off. Tank is full of oil, can anyone give me a clue as to what the problem is, i would sure appreciate any help.