I was having fun but seriously wear is a lot of what happens. We first need to isolate if it's the linkage or the starter itself.
Put the truck in neutral, apply parking brakes, ignition switch "on" then push down the round starter actuator with something like a screwdriver.
Report back on what happens.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."