Model TJ40ELENJ Serial# G03140114<br />After running, I am seeing black oil leaking from the exaust that smells like burnt oil. In a few days the oil stops leaking. Two years ago the vro evidently malfunctioned, the alarm also failed to sound which, resulted in a very expensive rebuild at the boat dealer. They insisted on installing a new vro and new sensors, while I wanted to disconnect and pre mix the oil. They said they would not guarantee the rebuild, if I disconnected. Could the problem I am now having be an over oiling problem? Should I disconnect the vro and premix?