1993 Johnson Evinrude "ET" 60 thru 70 Service Manual, P/N 508284, Page 79Get this manual
Primer System Servicing Functional Test
1Start engine and allow it to reach normal operating temperatureSet engine speed at 2000 RPM
[!] 2While engine is running, push in key Engine should run richly and drop 1000 RPM 3Remove air silencer assemblyf31 4Remove primer hose from any intake manifold or carburetor primer fitting that you suspect is cloggedConnect Va inch 1.0clear vinyl hose between the fitting and syringe filled with isopropyl alcohol