40003 58 Mercury SCREW, SHIFT LEVER

Engine Design
Cylinder And Valve LocationNumber And Arrangement Of Cylinders ... 60° V-16Valves Per Cylinder ... 4Displacement ... 69.1 liter (4210 cu in)Bore ... 170 mm (6.7 in)Stroke ... 190 mm (7.5 in)Compression Ratio ... 13.5:1Type Of Combustion ... Direct InjectionDirection Of Crankshaft Rotation (as viewed from flywheel end) ... CounterclockwiseFiring Order (Injection Sequence) ... 1-2-5-6-3-4-9-10-15-16-11-12-13-14-7-8Valve Lash Setting Intake ... 0.38 mm (.015 in)Exhaust ... 0.76 mm (.030 in) Front end of engine is opposite the flywheel end. Left side and right side of engine are as seen from flywheel end. No. 1 cylinder is the front cylinder on the right side. No. 2 cylinder is the front cylinder on the left side.Fuel System
General
Fuel Flow Schematic
(1) Fuel manifolds. (2) Fuel filter. (3) Fuel priming pump. (4) Fuel injectors. (5) Pressure regulating valve. (6) Fuel return to tank. (7) Primary fuel filter. (8) Fuel transfer pump. (9) Fuel line to filter (from transfer pump). (10) Fuel supply line from primary fuel filter. (11) Fuel line to priming pump (from transfer pump).Fuel transfer pump (8) is located on the right side of the engine. The lower shaft of the engine oil pump drives the gear type transfer pump. Fuel from the supply tank is pulled through primary fuel filter (7) by the fuel transfer pump (8) and sent to fuel filter (2).Fuel transfer pump (8) has a check valve and a bypass valve. The check valve is in the pump head assembly located behind where line (9) is connected. The check valve prevents fuel flow back through the transfer pump when fuel priming pump (3) is used. The bypass valve is located behind a cap (plug) in the drive end of the pump. The bypass valve limits the maximum pressure of the fuel. It will open the outlet side of the pump to the pump inlet if the fuel pressure exceeds 860 kPa (125 psi). This helps prevent damage to fuel system components caused by too much pressure.
Right Side Of Engine
(8) Fuel transfer pump. (9) Fuel line to filter. (10) Fuel supply line from primary fuel filter. (11) Fuel line to priming pump.
Right Front Of Engine
(1) Fuel manifolds. (2) Fuel filter.The transfer pump pushes fuel through fuel filter (2) on the front of engine to fuel manifolds (1). Each fuel manifold has two sections. The fuel flows through the top section of the manifold to inlet fuel line (13) connected to the right side of each cylinder head. Filter screens are located in the ports of the unit injector. A drilled passage (14) in cylinder head (15) takes fuel to a circular (shape of a circle) chamber around the injector. The chamber is made by O-rings on the outside diameter of injector (4) and the injector bore in the cylinder head.
Cylinder Heads
(4) Injector. (12) Outlet fuel line. (13) Inlet fuel line.Only part of the fuel in the chamber is used for injection. Approximately three to five times as much fuel as needed for normal combustion flows through the chamber to a drilled passage in the left side of the cylinder head. This passage is connected by outlet fuel line (12) to the bottom section of the fuel manifold. This constant flow of fuel around the injector helps to cool them.
Fuel Flow Through Injector
(4) Injector. (12) Outlet fuel line. (13) Inlet fuel line. (14) Drilled passage. (15) Cylinder head. (16) Cylinder.The fuel flows back through the bottom section of each fuel manifold to pressure regulating valve (5), on the front of the right fuel manifold. The fuel flows through this valve and then back to the tank.Check each engine installation for an excess fuel flow based on fuel consumed (used for combustion). Minimum flow is three times the amount of fuel consumed. Excess fuel is then returned to the fuel tank, not back to the pump inlet. This will make sure that any air in the system will be removed before the fuel is sent back to the injectors.Pressure regulating valve (5) has a spring and plunger arrangement between the bottom section of the fuel manifolds and the line that returns fuel to the tank. The valve keeps the pressure of the fuel at 415 to 450 kPa (60 to 65 psi).Fuel Injection Control Linkage
Fuel Injector Control Linkage
(1) Injector. (2) Control shaft (left side). (3) Bellcrank. (4) Control rod. (5) Rack. (6) Lever. (7) Governor shaft. (8) Control shaft (right side). (9) Cross shaft.A fuel injector (1) is located in each cylinder head. The position of rack (5) controls the amount of fuel injected into the cylinder. Pull the rack out of the injector for more fuel, push it in for less fuel.Rack position is changed by bellcrank (3). The bellcrank is moved by control rod (4). The control rods have an adjustment screw on the top. The adjustment screw is used to synchronize the injectors. The control rods are spring loaded. If the rack of one injector sticks (will not move), it will still be possible for the governor to control the other racks so the engine can be shutdown. Each control rod on the right side of the engine is connected by a lever (6) to control shaft (8).When the rotation of governor shaft (7) is clockwise, as seen from in front of the engine, the action of the governor linkage moves control shaft (8) counterclockwise (fuel "ON" direction).Right control shaft (8) and left control shaft (2) are connected by cross shaft (9). The linkage between the injectors on the left side of the engine and control shaft (2) is similar to the linkage on the right side.Should the linkage become disconnected from the governor, the weight of the control linkage will move the fuel injector racks to the fuel "SHUTOFF" position, and the engine will stop.Fuel Injector
Fuel Injector Operation
(1) Screw. (2) Rocker arm. (3) Clamp. (4) Control rod. (5) Rack. (6) Drilled passage. (7) Upper port. (8) Lower port. (9) Plunger. (10) Barrel. (11) Fuel passage. (12) Needle valve. (13) Lifter assembly. (14) Camshaft. (15) Piston.The injector is