New to the forums and boat motors. I have what I believe to be a 1995 mercury 40 classic, oil injection. Serial #0g238710. The guy I got it from removed the oil injection. He said just to mix it 50:1 and it will be fine. I guess that's right?? As I was looking at the motor I also noticed that since he removed the oil tank there seems to be no filter for the carb. Anyone know if I'm missing something, or if it is ok to run it that way, any help would be great.