On Tue, 12 Jan 2016 12:04:14 -0700, 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...?

Is there a gas shut off that was not turned on?

Is there a switch that was not flipped to the run position?

Silly, but folks overlook the simple things, first.

Does the engine fire and try to run - acts like it wants to?