1992-1998 Kawasaki PWC Jet Ski Service Repair Manual., Page 70Get this manual
6-1 INTRODUCTION The carburetion and ignition principles of two-cycle engine operation MUST be understood in order to perform proper tuneup on marine engineIf you have any doubts concerning your understanding of two-cycle engine operation, would be best to study the Introduction section in the first portion of Chapter 8, before tackling any work on the fuel systemThe fuel system includes the fuel tank, fuel pump, fuel filters, carburetor, and the associated parts to connect it all togetherRegular maintenance of the fuel system to obtain maximum performance, is limited to changing the fuel filters at regular intervals and using fresh fuelIf sudden increase in gas consumption is noticed, or if the engine does not perform properly, carburetor overhaul, including boll-out, or replacement of the fuel pump may be required phragm type carburetorsOne model Keihin has an integral fuel pumpWhen three carburetors are installed on an engine the center carburetor does not have the fuel pumpNo1 and No3 carburetors supply the fuelIf the design of the carburetor does not include the integral fuel pump separate remote fuel pump is mounted in the engine compartmentA diaphragm carburetor has no float bowl or floatInstead, diaphragm takes the place of the floatA hinged arm, still called float arm, rests against the diaphragm and opens and closes the needle and seat assemblyOperation Following the fuel through its course, from the fuel tank to the combustion chamber of the cylinder, will provide an appreciation of exactly what is taking placeAfter the engine starts, the fuel passes through the pump the carburetorAll systems have some type of filter installed