1994 Johnson Evinrude "ER" 60 LV 150, 150C, 175 Service Manual, P/N 500611, Page 53Get this manual
Description of Fuel System f1l 1The carburetors meter and distribute the fuel consumedThey control engine speed and power output by varying the intake charge densityTo react correctly to wide range of operating conditions, the carburetors have several separate fuel mixing circuitsCarburetor calibration is controlled by slow speed adjustable needlean intermediate air bleed orificeand high speed fuel orifice
l=.J fuel filterThe chamber allows fuel vapor to separate from the
liquid fuelThe vapor is removed from the chamber by the operation of the float valve and vapor pumpThe operation of the float valve is controlled by the amount of fuel in the chamberThe chamber provides liquid fuel to the pump during start-up and operation
f21 2Fuel enters the vapor separation chamber through the
l=.J is operated by changes in crankcase pressureThe vapor