1968 Evinrude Big Twin, Big Twin Electric, Lark 40 HP Outboards Service Manual, Page 19Get this manual
DESCRIPTION FUEL FLOW 40 HP fuel systems consist of fuel tank, fuel and carburetorfuel 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
INDUCED LOW VENTURI
carburetor is single barrel, f10at feed typehigh-speed jet is fixed and only the low-speed needle is adjustablelinkage is synchronized with the magneto the magneto armature plate
ATMOSPHERIC AlR PRESSURE