Place metal rack or trivet in bottom of crockpot (or fashion a trivet from aluminum foil). Sprinkle pork roast with salt and pepper; place on trivet in pot. Pour hot water around pork roast. Cover and cook on LOW for 8 to 10 hours or until done.
Remove meat from pot. Place on broiler pan or oven-proof platter. Combine molasses, mustard, vinegar, marmalade and ginger. Brush over cooked pork roast. Brown in 400 degree oven for 30 minutes, brushing several times with the sauce.