1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Repair Manual, P/N 520206, Page 66Get this manual

1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Repair Manual, P/N 520206, Page 66

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Description of Outboard Fuel System
W The fuel pump is of the diaphragm-displacement type and is
operated by changes in crankcase pressureAlternately, suction and pressure in the crankcase