1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 72Get this manual
Primer System Servicing Function Test 1Start engine and allow it to reach normal operating temper atureSet engine speed at 2000 RPM2While engine is runningElectric start modelsPush in keyEngine should run richly and drop 1000 RPM Manual start modelsStroke primer knob Engine should run richly and drop 1000 RPM f21 3Remove primer hose from any primer fitting that you t=J suspect is cloggedConnect Va inI.Dclear vinyl hose between the fitting and syringe filled with isopropyl alcohol4 Press lightly on the syringe If fluid moves through the fitting, it is okay If fluid does not move through the fitt ing, clean with OMC Cleaning Tool PI 326623 5Manual Start ModelsBe sure to check for obstructions in primer hose tee