1988 Johnson/Evinrude "CC" 40 thru 55 Models Service Manual, Page 92Get this manual
Primer System Servicing Functional Test
1Start engine and allow it to reach normal operating temperature Set engine speed at 2000 RPM2While engine is running :
Electric start modelsPush in keyEngine should run richly and drop 1000 RPM Manual start modelsStroke primer knob Engine should run richly and drop 1000 RPM