898101236 Mercury SCREW, Tapping

start by:a) remove valve covers 1. Disconnect the glow plug wires from the glow plugs. Remove the clips for the glow plug wires from fuel lines (3).2. Remove fuel lines (3) with tool (A). Put protection caps over all fuel openings.3. Disconnect fuel lines (1) from the fuel line adapters.4. Remove nuts (2) and the washers. Remove the locks and fuel line adapters from the valve cover base. 5. Loosen the four bolts (4) evenly and remove rocker shaft assembly (5).Install Rocker Shaft Assembly
1. Put rocker shaft assembly (1) in position on the head. Make sure the rocker arms and push rods are in alignment before the bolts that hold the rocker shafts in position are tightened. 2. Put clean engine oil on the threads of bolts (2) through (5). Tighten bolts (2) through (5) in number sequence to a torque of 200 20 lb.ft. (270 25 N m). Tighten bolts again in number sequence to a torque of 330 15 lb.ft. (447 20 N m). Tighten the bolts again in number sequence to a torque of 330 15 lb.ft. (447 20 N m). 3. Put clean engine oil on O-ring seal (7). Install the spacers and fuel line adapters (6). Install locks (8). 4. Connect fuel lines (9) to the fuel line adapters. Tighten the fuel line nuts to a torque of 30 5 lb.ft. (40 7 N m).5. Put clean engine oil on the O-ring seal on fuel lines (10) and connect the fuel lines to the fuel line adapters and precombustion chambers. Tighten the fuel line nuts to a torque of 30 5 lb.ft. (40 7 N m) with tool (A).6. Connect glow plug wires (11) to the glow plugs. Connect the clips for the glow plug wires to fuel lines (10).7. Make an adjustment of the valves to have a clearance of .015 in. (0.38 mm) for intake and .030 in. (0.76 mm) for exhaust. See VALVE CLEARANCE SETTING in TESTING AND ADJUSTING.end by:a) install valve coversDisassemble Rocker Shaft Assembly
start by: a) remove rocker shaft assembly 1. Remove retainer (1) from the end of the shaft.2. Remove the washers and rocker arm (2). 3. Use tool (A) to remove the pin that holds bracket (3) to the rocker arm shaft.4. Remove bracket (3), rocker arm (4) and the spring.5. Remove the remainder of the rocker arms. The center brackets do not have pins.Assemble Rocker Shaft Assembly
Make sure all parts of the rocker shaft assembly are clean before assembly. 1. Put clean engine oil on shaft (3).2. Install the center springs, rocker arms and bracket.3. Install spring (1), rocker arm (4) and bracket (2).4. Put tape around the shaft on each side of bracket (2) as shown. Put the hole in bracket (2) in alignment with the hole in shaft (3). Put a mark on each piece of tape in alignment with the hole in bracket (2). 5. Install pin (5) until it is extended .34 in. (8.6 mm) above the surface of bracket (2). Make sure pin (5) is in alignment with the marks on the tape before pin is installed. Remove the tape.6. Install rocker arm (6), washers (7) and retainer (8). Install enough washers until the end play on each end of the shaft is .005 - .040 in. (0.12 - 1.01 mm).end by: a) install rocker shaft assembly