Well, this thing is 7-years-old now, some new spark plugs are in order.  I replaced the OEM plugs with NGK Iridium.  It was very easy to change the plugs, you just have to remove a little shield on both sides.  Since the Briggs and Stratton is running on propane the plug life on this thing is very long.  I have had a few electrical issues with this generator, but the B&S motor has been a champ, zero issues.

Products used:

• 2 NGK Iridium plugs