Spun Armature Bearing? GENNY ISSUE 96 Onan Marquis 5500 BGM

Hi All, Spun Armature Bearing? GENNY ISSUE 1996 Onan Marquis 5500 BGM Loads up HARSH after a few moments. I'm calling it a Spun Armature Bearing? We don't have a parts list or schematic f...