1991 Johnson/Evinrude EI 60 thru 70 outboards Service Manual, Page 87Get this manual
Primer System ServicingVRoi Models 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 RPM3Remove air silencer assembly
Remove primer hose from any intake manifold or carburetor primer fitting that you suspect is cloggedConnect lS inch I.Dclear vinyl hose between the fitting and syringe filled with isopropyl alcohol5Press lightly on the syringe If fluid moves through the fitting, it is okay If fluid does not move through the fitting, clean with OMC Cleaning Tool PI 326623