1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 340Get this manual
After Repair on any part of the fuel systempressure test engine portion of fuel system as shown: See Section for testing the fuel tank portion Squeeze till bulb feels hard
When Storing :
Whenever possible, remove Hose from motor And from tank tank cap has an air vent valve, make sure it's closedand store around ears of tan kThis way gasoline is trapped in tank and not in the hose where it might leak onto the floor if hose deteriorates