Patent ID: 8066538

Claim:
An engine-balance system for a jet boat having a first side hull, a second side hull, and a central hull, the engine-balance system comprising: (a) a first impeller having a first end and a second end and a second impeller having a first end and a second end; wherein the first end of the second impeller is connected to the second end of the first impeller; (b) an engine; (c) an engine shaft having a first end and a second end extending from the engine through both the first impeller and the second impeller; wherein the engine is for driving the engine shaft; (d) a first water intake pipe fluidly connected to both the first impeller and to the second impeller; (e) a second water intake pipe fluidly connected to both the first impeller and to the second impeller; wherein water from outside the jet boat is driven through both the first water intake pipe and the second water intake pipe via one or more water intake pumps disposed in the central hull; wherein water from both the first intake pipe and second intake pipe is further driven to the first impeller and to the second impeller; (f) a jet pump nozzle fluidly connected to the first end of the first impeller; wherein water from the first impeller is forced through the jet pump nozzle and outside of the jet boat via the engine and engine shaft; (g) a first exit pipe fluidly connecting the second impeller to a first exit pipe aperture disposed on the first side hull; a second exit pipe fluidly connecting the second impeller to a second exit pipe aperture disposed on the first side hull; a third exit pipe fluidly connecting the second impeller to a third exit pipe aperture disposed on the second side hull; a fourth exit pipe fluidly connecting the second impeller to a fourth exit pipe aperture disposed on the second side hull; wherein water from the second impeller can be driven outside of the jet boat via at least one of the exit pipes; (h) a balance detecting device for detecting an imbalance of the jet boat; and (i) a semi-valve separating each of the exit pipes from the second impeller; each semi-valve being movable between an open position and a closed position and biased in the closed position; wherein each semi-valve is operatively connected to the balance detecting device; wherein when the balance detecting device detects an imbalance, the balance detecting device can selectively move one or more of the semi-valves to the open position for allowing water to exit the second impeller so as to offset the imbalance; wherein the first impeller is for providing forward motion to the jet boat; wherein the second impeller is for providing balance to the jet boat.