No, John. The neutral must be switched to prevent the equipment bonding conductor (EGC) from being in parallel with the neutral in installations where the generator neutral is bonded to the frame.
This would permit the neutral (unbalanced) current to flow on the EGCs which is a NEC violation.

Note also that in these cases, where the neutral is switched, the generator neutral is required to be earth grounded.

Ed

[This message has been edited by electric-ed (edited 08-24-2002).]