Re: Please Help Identify.....Roughly....Years/Models
The Lightfour is a relatively desirable motor. Smooth runners, decent power. Carbs can be fussy, but when set up correctly they work fine. Generally don't need much in the way of tune-up stuff for them as the basics (gaskets) can be made, and a dressing of the points is usually all that's needed for the magneto.
For the Elgin, looks like a 6hp. Common motor (sold by Sears & Row-Back), some guys like to collect them, but they're not super valuable or anything. Nice enough motors, but nothing that really draws the collector crowd...