Oil grill grates with a wad of oil-soaked paper towels before lighting grill to prevent sticking. Preheat gas or charcoal grille on medium-low heat. Sprinkle pork chops with salt and pepper on both sides.
Using a basting brush, spread marmalade evenly on both sides of all pork chops. (Do not stick brush into marmalade jar after it has touched meat, or it will contaminate it.)
Grill on medium-low heat on a closed grill, flipping every 5-10 minutes, depending on how hot your grill is and how quickly the outside of the pork chops brown. Continue basing with marmalade, and grill until pork chops are no longer pink inside, or meat reaches 165 degrees with a meat thermometer. Allow to rest 5 minutes. Enjoy!