so many ques in my mind after knowing ur complain.. firstly i want to know ...when this thing started ....from when u start complimentary feed? stool routine and microscopic ttg test required

Urine output depends on fluid intake at all ages. If he's NOT having discomfort during passage of urine,then probably he's overfeeding. Give just TWO milk feeds including one top milk feed using a spoon and katori and 4 solid meals a day including curd and Banana in the diet in addition to whatever you prepare at home. But if he's crying during passage of urine,he could have UTI,consult your paediatrician for physical examination and treatment with report of urine routine test.