1973 Evinrude Norseman 40 HP Service Manual, Page 17Get this manual
ALIGNING RECESSES
LEAF PLATE
Figure 3-3Fuel Pump and Filter
Figure 3-2Leaf Valve Assembly LEAF VALVES The leaf valves time the injection of the fuel mixture into the crankcase by opening only when the pressure in the crankcase has dropped to predetermined point on the compression strokeSee Figure2
FUEL TANK The fuel tank is non-pressurized, suction operated tankFuel is lifted from the tank to the carburetor by the fuel pump Priming is achieved by squeezing
DRAIN SCREW