1968 Evinrude Ski-Twin, Ski-Twin Electric 33 HP Outboards Service Manual, Page 15Get this manual
DESCRIPTION FUEL FLOW
The fuel system consists of fuel tank, fuel and carburetor The fuel tank is non-pressurized, suction operateddiaphragm-displacement type fuel the motor draws fuel from the tank and furnishes it to the carburetor through fuel filterCARBURETOR