On 1/12/2016 1:04 PM, Don Y wrote:
A friend is having trouble with a small (5-7HP) engine.
Not starting. Aside from checking for spark (after
ensuring no "old" fuel present), I can't think of any
easy tests that he can perform...?

If it's an overhead valve engine check to be sure the valves are
opening. Sometimes the adjustment backs off, and sometimes the tip of
the push rods will wear down or break.