I just bought a 1988 Evinrude 140 with VRO. The guy I bought it from said that it worked fine. I've never delt with vro before so I'm not sure about how it works. I got it all hooked up and started but Im not sure if the vro is working. How can I tell? Does the alarm go off if it's not pumping oil or if the oil level is low? How hard is it to disconnect it all together?