fig7 for reversing as will be apparent to those skilled in the art the output of controller 26 is provided directly to the brushes of motor 48 through circuitry provided on board 74 without the need for additional wiring between controller 26 and motor 48 this arrangement substantially reduces the opportunity for the emission of electromagnetic noise while the inventive reverse battery protection it suitable for use in any type of trolling motor controller whether located in the control head or in the motor housing the preferred embodiment is shown in a trolling motor having a submerged controller in such an embodiment preferably the heat producing components i e transistors 52 and 54 of motor controller 26 are mounted on circuit board 70 preferably circuit board 70 is of a heat sinking type such as direct copper bonded substrate or insulated metal substrate and is positioned by board housing 86 to maintain contact for good thermal conduction from the heat producing components to the outer surface of controller assembly 26 fig2 the remaining components of motor controller 26 are preferably located on board 72 with further reference to fig4 5 and 6 screws 88 a c are received in spacers 84 d f respectively to secure board 70 to board 72 boards 72 is then received on connectors 78 and 80 of board 70 to form motor controller 26 which is in turn received in controller housing 94 controller housing 94 includes a forward opening 96 for receiving controller assembly 26 and a rear bulkhead 98 which mates with heat sinking surface 100 of circuit board 70 board 70 includes aperture 102 board 72 includes aperture 104 board 74 includes.