Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 141Get this manual
FUEL PUMP tightened securely to hold the adjustmentHOWEVER, do not tighten it to the point where an adjustment cannot be made by hand4-11 FUEL PUMP SERVICE
A considerable number of fuel pump designs and sizes have been installed on the larger JohnsonEvinrude engines covered in this manualOnly one can be rebuilt and detailed procedures with illustrations are given in this sectionThis fuel pump has three nipples providing the means of connecting fuel and vacuum linesThe vacuum line is connected to one nippleThe other end of this hose is connected to the vacuum side of the engineThe inlet hose (from the fuel tank), is connected to the second nippleThe outlet hose (to the carburetor), is connected to the third nipplel'viinor changes have been incorporated into the fuel pump over the yearsThese changes will be identified in the textAll other fuel pumps must be replaced as unitHowever, the pump cover can be