5031268 EVINRUDE SEAL, Oil, upper

Illustration 1 g02789714
(1) Fuel tank
(2) Fuel overflow pipe
(3) Injection pipe
(4) Injection nozzle
(5) Fuel filter air vent pipe
(6) Fuel transfer pump
(7) Fuel filter and water separator
(8) Fuel injection pump
(9) Fuel injection pump air vent pipe Fuel from the tank flows in the passage as shown by the arrows, and is injected from the nozzle via the fuel injection pump. Overflow fuel returns to the tank. The system includes filters and other concerns to protect from entrance of air, water, and dust. While the engine is running, fuel is fed into the injection pump by the fuel feed pump after passing through the fuel filter and water separator and fuel filter where any foreign matter is removed. The fuel camshaft actuates the injection pump and force-feeds fuel to the injection nozzle through the injection pipe. Fuel is then sprayed through the nozzle into the combustion chamber. The fuel discharged after lubricating and cooling the injection nozzle is returned to the fuel tank automatically through the overflow pipe.Fuel Injection Pump
Illustration 2 g03382516
(10) Dumping valve
(11) Control rack
(12) Delivery valve holder
(13) Delivery valve
(14) Cylinder
(15) Plunger
(16) Tappet roller Plunger (6) with a left-hand lead reciprocates via tappet roller (7) by way of the camshaft fuel cam. Fuel is delivered into the injection nozzle.Pump Element
Illustration 3 g03382833
View of injection control in engine stop position
(17) Slot
(18) Plunger
(19) Control rack
(20) Delivery chamber
(21) Feed hole At the engine stop position of the control rack (19), slot (17) on the plunger align with feed hole (20). Fuel is fed to the delivery chamber (20) through the feed hole. The pressure in the delivery chamber does not build up and no fuel is forced into the injector nozzle.
Illustration 4 g03382882
View of injection control at fuel delivery position
(17) Slot
(18) Plunger
(19) Control rack
(20) Delivery chamber
(21) Feed hole
(22) Control groove At the fuel delivery position of the control rack, plunger (18) is rotated by control rack (19). Feed hole (20) is closed when the plunger is pushed up. The pressure in the delivery chamber increases, and fuel is forced into the injection nozzle until control groove (22) meets feed hole (21).Delivery Valve
Illustration 5 g03389610
(B) Valve
(C) Seat surface
(D) Valve seat
(E) Relief passage The delivery valve consists of the valve and valve seat.The delivery valve performs the following functions:Reverse flow-preventing function. If the fuel flow reverse from the injection nozzle side when the plunger lowers, the time lag between the next delivery start and the nozzle injection start increases. To avoid this, the delivery chamber to injection pipe interruption by valve prevents this reverse flow, thus keeping fuel always filled in the nozzle and pipe.Suck-back function. After completing the fuel delivery, the valve lowers, and the relief plunger end contacts the valve seat. The valve further lowers until its seat surface seats firmly the delivery valve seat. During this time, the amount of fuel corresponding to (A) is sucked back from inside the injection pipe, the pressure inside the pipe is reduced, thus leading to an improved injection shut off and preventing after leakage dribbling.Dumping Valve
Illustration 6 g02793388
(A) At Fuel Injection
(B) At Fuel Return (A) At fuel injection. Since dumping valve is pushed up to press the spring, fuel is pressure-fed to injection nozzle the same as without dumping valve. (B) At Fuel Return. At fuel return by delivery valve after fuel injection, fuel returns through dumping valve orifice. Generally second injection is apt to occur by reflex pressure due to reaction of sudden pressure drop when changing into fuel return by delivery valve from high injection pressure. As a result of preventing this second injection perfectly by dumping valve and dissolving nozzle clogging, durability of injection nozzle is improved. Governor
The fuel system on this engine utilizes a mechanical governor that controls the fuel injection rate at all speed ranges by utilizing the balance between the flyweight centrifugal force and spring tension.An independent governor shaft rotates at twice the speed, providing better response to the load function and delivers greater engine output.
Illustration 7 g03383174
(23) Torque limiter
(24) Start spring
(25) Governor spring
(26) Fork lever shaft
(27) Flyweight The flyweight is mounted on the governor shaft that rotates at the same speed as the crankshaft.The fork lever assembly is composed of fork lever one (31), fork lever two (29), and floating lever (30). A slide plate is installed in fork lever one. Governor spring (25) is hooked to fork lever 2.The floating lever holds the torque that prevents power output loss when the engine is overloaded. The start spring is hooked to a slide plate, and holds the control rack in the direction of the full fuel position.Fork lever two and the floating lever are installed in fork lever one with the fork lever shaft. The maximum torque limiter (23) limits the amount of fuel injection during an overload with the torque pin.
Ill