1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 66Get this manual
Primer System Servicing Function Test
1Start engine and allow it to reach normal operating temperature Set engine speed at 2000 RPM
2While engine is running:
Electric Start ModelsPush key inEngine should run richly and drop 1000 RPM