I purchased this engine new something like 20 years ago.  It's been in the corner of the garage ever since.  It's never been set up or run.  Likewise the ST5 generator head.  After all this time, it's pretty clear I'm not going to get  to it.  $2000.
Sorry - I couldn't figure out how to add images to my post, so here are a couple links to photos:
https://ourwebstop.com/IMG_3770.jpg
https://ourwebstop.com/IMG_3772.jpg