On Tue, 12 Jan 2016 21:45:35 -0700, Don Y
wrote:

I have to assume he knows the drill. He works with much of this
stuff (but never has to *repair* it).

I cannot find a link that has been posted here many times before. A
really good repair guide. In the mean time, you might pass this one to
your friend.

PDF:

http://static.ddmcdn.com/pdf/how-to-repair-small-engines.pdf