1976 Evinrude 200 HP Outboards Service Manual, PN 5199, Page 24Get this manual
in the crankcase has dropped to predetermined point on the compression strokeThe leaf is so designed that it maintains constant contact with the leaf plate, and will spring away from the plate when predetermined pressure is exerted against itLeaf travel away from the plate is limited by the leaf stopWhen pressure is removed, the inherent spring action of the segments returns and holds them against the plateCHOKE AND CHOKE SOLENOID The carburetors are fitted with an electric chokeThe choke may be manually operatedWith the choke lever in the "OFF" position, the choke valve is held in fixed open position, allowing air to pass freely through the inletWith the choke lever in the "ON" position, the valve is held in closed position, restricting the flow of air to the carburetor case are transmitted to the pump diaphragmSuction created on the upward stroke of the piston causes the diaphragm to displace and draw in fuel through the inlet valveOn the following downward stroke of the piston, crankcase pressure flexes the diaphragm in the opposite directionThe inlet valve is then seated, preventing the return of fuel to the tank, while the discharge valve is opened, allowing fuel to pass to the carburetorFuel is drawn through fine filter screen before entering the pump to remove impuritiesSee Figure 3-2FUEL TANK The fuel tank is non-pressurized, suction operated tankFuel 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 tirnes or until pressure resistance to squeeze the bulb increasesSee Figure 3-3