At stumps, the hosts were 305 for 3 in 90 overs with Nishit Shetty and skipper Sairaj Bahutule batting on 43 and two respectively.
Shetty was included in the playing XI this morning as a replacement for an indisposed Vikod Kambli. Shetty was not in the squad chosen for the match.
One-down Indulkar notched his maiden century in the national championship to give the much needed impetus to the Mumbai first innings, after the hosts won the toss and elected to bat, before retiring to the pavilion due to leg cramps after an unbeaten knock of 111 with 16 fours.
Indulkar, who was at the crease at the fall of opener Vinayak Mane cheaply in the second over, stayed till tea in a home team score of 211 for 2. He has batted for 260 minutes and faced 287 balls.
Indulkar put on 162 runs for the third wicket with Mazumdar and (111) could not resume his innings in the third session which brought the left-handed Shetty to the crease.
Muzumdar and Shetty added 87 runs for the same wicket before the former was declared caught behind down the leg side off a muted appeal by umpire Vijay Chopra. His knock included 15 fours and came off 197 balls and after a stay of 284 minutes.
Brief scores: Mumbai 305 for 3 (V Indulkar retired 111, A Muzumdar 111; K Kalyankrishna 2 for 25) v Andhra.