Combine together in a pot water, vinegar, sugar and salt. Bring it to boil. Turn it off, mix in ketchup and set aside.
To sterilize jars, preheat oven to 215F. Wash jars and lids, place them in oven for about 15 minutes or until completely dry.
Wash cucumbers in cold water, cut of both ends of cucumber. You may need to cut some cucumber into smaller pieces to fill in empty spaces in a jars.
Cover bottoms of jars with dill, fill them up tight with cucumbers.
Pour in marinate all the way to the top. Cover with lid, but not tight.
Preheat oven to 250F. Place jars in oven and let them sit there for about 20 minutes, it all depends on size of the jars and cucumbers. Once cucumbers change color, remove them from oven. It is very important not to overcook cucumbers so they still stay crispy, so be sure to remove them from oven when they change in color.
Close all lids really tight and put all jars upside down. Cover with towel and let them sit there for 4-5 hours. Cucumbers will cook little more in hot water.
Store in cool place, they can be stored for up to a year