Need some help. I have a walker with a 20hp kohler commander gas burner engine. I just pulled the engine and installed a new starter. After I put it all back together and started it up, the oil light and alarm came on. oil level is perfect, not overheating, sounds good running. I looked a the oil sensor connection on top of engine under air filter. Looks ok. It has to be an connection problem? Does anybody have an idea.