Won't Spin Past Compression Stroke

[Tiger Small Engine]

After 18 replies, 3 different starter replacement attempts and jumping with a vehicle battery, the obvious that has been explained is not sinking in.

This seems to be stuck in a "let's replace something loop"... valve adjustment does not compute. No capability?

Some people have trouble listening and learning. Some people think their skills exceed reality. Most people, gratefully, are not like this.