Systems, assemblies, and methods for operating a marine motor are provided herein. An example motor system includes a motor, a battery, and a processor. The processor is configured to receive a user input indicating a desired speed, determine a charge level of the battery, determine an optimized speed or propulsion of the marine motor based on the desired speed and the determined charge level of the battery, and transmit a signal to the motor to operate accordingly. The processor may generate a correction factor based on at least one of the determined charge level of the battery, a boat speed profile curve, and a boat travel distance curve; and determine the optimized speed or propulsion by applying the correction factor to the desired speed. Thus, an eco-mode can be provided to help maintain a high level of battery charge while still enabling desired use.