Chrysler 75 and 85 HP Outboards Service Manual OB 3646, Page 41Get this manual
the main nozzle which mixes down stream wi the existing intermed iate and idle fu el already flowing in the system Figu re 3 High Speed OperationAs the hrottle opening is increased to obtain high speed operation, suction at the main nozzle also inc rea seslifting greater quantities of fuel from the nozzle wellAs this occursthe fuel level within the nozzle well tends to lowerAs the fuel continues to lower in the fuel well, you will note that the bottom end of th idle tube will eventually become exposed to in coming carb uretor air through the main nozzle ai bleed located in the choke bore When th is level is reachedth idl ube is no longer in solid fueland the intermediate fuel being delivered through the idle system lessensAt this time the throttle would be wide op en near wide open position during maximum or near maximum fuel delivery to the engine High speed fuel then flows from the fuel bowl th rough the main fuel jet, through the nozzle well area, hrough the main nozzle and into the engineThe fuel level in the nozzle well is dependent on the fuel being consumed by the engineand this in urn dependent upon the throttle openingFigu re 4