18.5 HP Briggs and Stratton (Model #31N707) starts fine, then dies 10 minutes later

[mechanic mark]

Remove blower housing, top cover on engine, clean everything by hand & shop vac debris, no liquids or cleaners, a small nylon brush works well as does a piece of coat hanger wire for debris lodged in vanes on heads. Be sure to clean underside of blower housing as well. Check all electrical connections by hand including all ground cables & straps making sure everything is tight & secure.

 

[lot2mow]

I replaced the gas cap and so far so good.