Only if you have an inoperatrive N2 indicator, in which case you position the start lever to idle (rich) at 03% N1. It is quite possible to have a light off at max motoring N2 without an indication of N1. However, you are expected to abort the start if there is no indication of N1, 30 seconds after fuel cutback. In many cases the ground engineer calls N1 rotation during engine start.