1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 73Get this manual
Electric Primer
1To test the solenoid windings, calibrate an ohmmeter on Jow ohms scale and connect between the purplewhite and black leads Meter should indicate 5.5 .5 ohms2To test solenoid valve and seat: Lightly pressurize inlet fitting with alcohol and syringe With lever in run position, no fluid should enter inlet fitting With lever in prime position, fluid should come out both outlet fittings COA1136
3To inspect or replace internal components, remove the four solenoid cover screws4 When assembling solenoid, back up screws in their holes to engage original threads and tighten securely