The Sb galaxy NGC 4736 has a well observed ring of bright HII regions just outside its bulge, at some 1.3 kpc from the nucleus, with an apparent expansion velocity of about 30 km/s. Dynamical evidence is produced to show that this outflow originated in a starburst in the bulge which occurred some 3 x 10 exp 7 years ago. Corroborative evidence for the presence of star-forming activity in the bulge at that time is shown from color maps in B-V and R-I, which reveal excesses, in a series of concentric segments centered on the nucleus, expected from the coherent star-forming processes characteristic of a starburst, well defined in space and time.