What a mess that oil makes, I will let MassOdy do the talking here he is our electrical expert I can tell you start cleaning off the parts using a rag don't use any solvents until you get premission from MassOdy use the wrong stuff and you will remove the insulation from the windings
not a good thing, take it out in the sun and look at all the windings anything copper look close you want to look to see if the copper is all the same color discolored windings or wire, connectors is usually where a problem is..
Be careful with the parts so you don't nick the insulation by banging parts together.