It's probably neither. Look on the clutch arm assembly. There's a hole there that is supposed to have a rubber bumper piece in it ($1.39) from Nissan. Replace it with a set of pliers (you don't need to use grease) and the problem will be fixed. The bumper activates the safety switch to engage the starter. Call me if ya can't figure it out....727-856-9245, Sonik.