For the effort involved, and the potential cost of damage to that motor, I'd make my own stand out of some 2x4's. won't cost more than $15-$20 for the wood, and then you can set it on the stand and be comfortable that nothing will get damaged.
Doesn't need to be fancy, and with the weight you've got, 2x4's are fine.
A couple of simple ideas:
https://d19vj6yy87fjj8.cloudfront.net/wp-content/uploads/2011/08/outboard_stand.jpg
https://www.classicmako.com/projects/ed_ring/images/motorstand6.jpg
https://forum/images.bateau2.com/albums/userpics/22633/IMAG0503a.jpg
https://wudvanzah.blogspot.com/2015/01/homemade-wood-engine-stand.html
Good luck!