There are no inline fuses. You need to check the circuit breaker at the master power switch which obviously you have found. In addition, there will be another at the cranking battery which you should check. Either you have a bad circuit breaker or you have a short some where. Check to make sure the all the nuts are tight on the block which will be mounted on the transom. There will be multiple wires nutted on to this block and they should all be tight!