The only problem I can see is if the vehicle is not designed to use a box starter. For example, the Savage truck cannot be started with a box; it must be started with a pull start or roto start.

In addition, the Traxxas 4-tec (at least the older one with the TRX2.5) cannot be started with a starter box because the flywheel is too small. A larger flywheel would be needed in this case so the starter box wheel will hit it.