1967 Evinrude StarFlite 80 HP Outboards Service Manual, PN 4359, Page 16Get this manual
LEAF VALVES There are four individual leaf block housings, one for each cylinder, but all attached to common leaf plate baseEach leaf block housing has twin 4-segment leaf valves attached, one on each sideThe entire assembly is mounted between the crankcase and intake manifold, and may be removed for inspection and repairsSee Figure 3-2AUTOMATIC CHOKE The carburetor is fitted with an automatic hot air choke to reduce the ratio of air to fuel for cold startsTwo choke valves, one in the air inlet of each barrel, are mounted to common choke shaftA bi-metal spring is located in the choke housingWith the choke knob in the "OFF" position, the choke valves are held in fixed open position, allowing air to pass freely through the inletWith the choke knob in the "ON" position, the valves are held in closed Figure 3-3Carburetor and Automatic Choke ALIGN ING RECE SS AF BLOCK ASSEMBLI S
FUEL TANK The fuel tank is non-pressurized, suction operated ta nkFuel is lifted from the tank to the carburetor by the fuel pumpPriming is achieved by squeezing the primer bulb (part of the fuel line) several times or until pressure required to squeeze the bulb increasesThe connector nearest the primer bulb must be connected to the fuel tank See Figure 3-5