If it's an auto reset breaker -- yes it will reset itself. The breaker should be located within one foot of the positive terminal of the battery. If it has a reset button on it then the breaker is not likely the problem. Regardless, you need to see what's causing the interruption. Use a test light or voltmeter to check for voltage at the connector up front when the motor quits. If there is no juice there, the problem lies between the receptacle and the battery. Poor/corroded battery terminals may be the issue. A weak or dying battery may be the issue but very likely it is the circuit breaker tripping and resetting. You need to determine why. Are the wires getting hot indicating an over-current draw. Remove the prop and check for fish line wrapped tightly around the shaft. Does the shaft spin freely (a slight jerkiness is normal). If the shaft is relatively hard to turn, then the bearings may be going bad or water has penetrated the motor housing.