mower quits when stopped after 15 minutes

I have a 2 year old Craftsman Gold 6.75 mower. It starts on the second or third pull, but when it is stopped after 15 minutes to empty the bag, it will not start again. We don't have the receipt so can't return it. My husband is very good with mowers and one reason we selected this model was the Briggs-Stratton motor.

Does anyone else have this problem? Is there any way to fix it? Normally after a few days, it will start back up. If I don't stop it, it will run the entire time without a problem.

I hope someone can help. It is very frustrating.

Thanks for any help.

Sheila