As the problem got worse I removed the fairly new spark plugs and noticed the left one was black. I replaced both plugs and still had the same ocasional sputter or misfire. I checked the
compression and rechecked the carb and found nothing wrong.
I decided to take an educated guess and replaced the left
side ignition coil. It has run perfect ever since. I guess when the coil got hot enough, it would cause the misfire.
Thanks to all that helped!