Originally Posted by rwidman
Or you could just replace the pump and go boating.
I won't pretend to be Ancora but will take a shot at the answer.
1 He's retired
2 He has a well equipped home shop
3 He has the knowledge
4 He has plenty of free time to tinker
I've fabricated and repaired plenty of things that most would just buy for my final assumed reason.
5 Satisfaction of completing a job most folks lack the ability or desire to do themselves.