Patent ID: 8033878

Claim:
A vessel speed control system for a small planing boat for controlling a vessel speed of the small planing boat, a boat body of the small planing boat being driven by thrust force generated by jetting liquid from a nozzle supported by a portion of the boat body and driven by an internal combustion engine, the vessel speed control system comprising: vessel speed detection means for detecting a speed of the boat body; speed information storing means on which previously set maximum speed limit data of the boat body are stored; vessel speed control means for controlling the speed of the boat body so as not to exceed the maximum speed limit based on a result of a correlation, the correlation being performed by correlating a speed detected by the vessel speed detection means with the maximum speed limit stored on the speed information storing means; wherein the vessel speed control means comprises output power control means for controlling an output power of the internal combustion engine based on the result of the correlation; and wherein the output power control means comprises: revolution speed detection means for detecting a revolution speed of the internal combustion engine; surplus revolution-speed acquiring means for acquiring by calculation a surplus revolution speed value over the revolution speed of the internal combustion engine necessary to make the small planing boat reach the predetermined vessel speed, when the vessel speed exceeds the maximum speed limit as a result of the correlation; and revolution speed control means for controlling the revolution speed of the internal combustion engine based on the acquired surplus revolution speed value.