And there is the crux of the OP's problem, and many!
Great advice from Scotty 83:
"Find a way to push him and don't stop. My sister had picked out her college by age 12. I still didn't know my senior year. Luckily my parents kept pushing and I'm very glad they did. I work in manufacturing management and every factory I've been in is full of people who were unmotivated 16 year olds that turned into unmotivated 20 year olds that really regret it."
Great advice from Midlo Dad:
"whether or not parents want to admit it, allowing your son to fail is not only OK, it's REQUIRED, if you want him ultimately to succeed as an adult. So if he isn't willing to do what it takes to be a college recruit, let him fail at that. Let it be a lesson to him that his parents won't save him from all his mistakes, procrastination or even laziness. The sooner he learns that, the better. And the more painful the loss, the more likely it is that the lesson gets driven home."
Both passionate responses that ring true, and contradict each other in every way!