My 96 175 Evinrude has become very hard to start and smokes like a military grade smoke gernade at idle. I had to give it a lot of throttle to get it running. I ran it on muffs today for about 5 minutes and found a lot of oil built up in the exhaust port at the prop. Is this normal? (I am a new boater)Been having this problem for the last 3 times on the water. After reading some other posts I feel like it could be the VRO pump. Am I going in the right direction?