If your Onan Emerald has points, it is probably a 1985-89, BGE model. if it has a transformer voltage regulator, it would be a 85-87 model.
The 6.5 NHE models have different engine than 4&5 KW . many of the generator parts interchange with them, depending on the type of voltage regulation. I could identify it with a couple of good photos. Don't know what's allowed on this forum, but email to careco.phil@gmail.com if you like. Onan gen.tech 35years+