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float and pressure
difference in air pressure at the venturi throat and the air inlet.
21.4mm or .84" from the float bowl mating surface to the top of the float
in the carburetor float bowl, set at 21mm when sitting at closed position. measure from top lip edge of body to top of float. dont forget the needle and seat need to be clean
float valve or float are bad
increase in air velocity in the throat of a venturi causing an increase in air pressure.
Use a float level gauge and measure the distance from the carburetor body to the float arm - The correct float level is 7.5mm(0.30in.)
The screw set on the float will indicate the the settings on a 5.5 hp engine.
Float height settings for the Kawasaki bayou are 17 millimeters from the edge of the float bowl to the very top of the float. Raising the float lowers the fuel level, this will also prevent fuel from coming out of the overflow tube.
Yes but it is one main thing. On a quadrajet marine the overflow on top in case the float sticks has a tube that goes down into the carburetor intake. An auto one does not have this tube.This tube would cause the engine to flood and stall if the floats stick.That's about it. Of course that is pretty big considering it would just dump gas all over the engine if the float sticks and blow up your boat if that tube was not inserted.
If hose is not disconnected or split, the float valve could be stuck open or the float could be punctured.
Back-suction mixture control: According to the dictionary of Aeronautical Terms, back-suction mixture control is a type of mixture control used in some float carburetors that regulates the fuel-air mixture ratio by varying the pressure of the air above the fuel in the float bowl.