Patent ID: 8109801

Claim:
A boat propulsion system comprising: a power source arranged to generate a turning force; a propeller arranged to be driven by the turning force of the power source; a control lever to which an accelerator opening is input by an operation of a boat operator; an accelerator opening detection section arranged to detect an operating amount of the control lever and to output the operating amount of the control lever; a correspondence relationship switching section arranged to change a degree of the operating amount of the control lever by the operation of the boat operator and output a correspondence relationship which defines a degree of the accelerator opening relative to the operating amount of the control lever as a correspondence relationship switching signal; and a control device arranged to control output of the power source based on the operating amount of the control lever and the correspondence relationship switching signal; wherein the correspondence relationship defining the degree of the accelerator opening relative to the operating amount of the control lever changes between a first positive amount and a second positive amount that is different from the first positive amount.