Here "struck" is an idiom that means Yahweh caused him to be sick. AT: "Yahweh caused him to suffer from an incurable disease in his intestines" (See: [[rc://en/ta/man/translate/figs-idiom]])
This is an idiom that refers to a set or appointed time. AT: "in the proper time" or "when the time was right" (See: [[rc://en/ta/man/translate/figs-idiom]])
The custom of the Israelites was to make a bonfire to honor the king who had died. They did not do this for Jehoram to express their contempt for him. This can be stated explicitly. AT: "did not make a bonfire to honor him as they normally did to honor kings when they died" (See: [[rc://en/ta/man/translate/figs-explicit]])