If after you do your trouble shooting and you confirm you need a new starter for your Onan generator you can use this one.
New Starter Replaces ONAN 1912231 A029p528 https://amzn.to/3TRToom
For Onan generator models 5500 and 7000
Starter Replaces ONAN 1912231 , DENSO 2280008830 , 2280008831 , 26024344A