I have a 1998 175 hp Evinrude with VRO....I was having so much problems with blue smoke, I converted the engine to mix my own. After reading a forum here regarding the common issues of the VRO system I have decided to replace the system back to as built...Heres my question...I have right now about 25 gallons plus of mixed gas and oil. Could I install the new VRO pump and just not put oil in the tank and run the mix out or would it be better if I added some mix to the oil tank or do the dreaded syphon all the mix? BTW I have replaced all the hoses and the check valve I believe to be the problem