825713 Mercury PISTON PIN

The camshafts must be correctly timed with the crankshaft before an adjustment of the unit injector lash is made. The timing pins must be removed from the camshafts before the crankshaft is turned or damage to the cylinder block will be the result.
The Electronic Control Module produces high voltage. To prevent personal injury make sure the Electronic Control Module is not powered and the unit injector solenoids are disconnected.
This adjustment is critical. Ensure that the adjustment of the fuel injector is made properly.
Refer to Testing and Adjusting, "Crankshaft Position for Fuel Injector Adjustment and Valve Lash Setting". All of the injectors can be checked or adjusted with the two crankshaft positions in the chart. This will make sure that the pushrod lifters are off of the lobes and on the base circles of the camshaft. Before a check or an adjustment can be made, the tooling must be set to the correct dimension. Use the following procedure in order to set the tooling to the correct dimension:
Illustration 1 g00359732
Adjustment Of Fuel Timing Tools
(1) 6V-3075 Dial indicator
(2) 6V-9058 Fixture assembly
(3) 6V-9056 Setting gauge
(4) 8S-3675 Indicator contact point
Install 8S-3675 Indicator Contact Point (4) on the 6V-3075 Dial Indicator (1).
Install 6V-3075 Dial Indicator (1) in the collet of 6V-9058 Fixture Assembly (2).
Install 6V-3075 Dial Indicator (1) with 6V-9058 Fixture Assembly (2) onto 6V-9056 Setting Gauge (3). Ensure that the magnetic base of the timing fixture is on the top surface and that the contact point is on the bottom step. Note: The 6V-3075 Dial Indicator (1) has two or three dials that register. The larger dial has marks for every 0.01 mm (0.0004 inch). The red numbers on the dial are for minus readings. The black numbers on the dial are for plus readings. The smaller dial has marks for 1.00 mm (0.040 inch) (one complete revolution of the large dial).
Illustration 2 g01167677
(5) Fuel injector's retainer
(6) Shoulder
(7) Fuel timing dimension 118.2 mm (4.65 inch)
Ensure that the top surface of fuel injector's retainer (5) and shoulder (6) are clean and dry.
Illustration 3 g00341584
Fuel timing tools in position
Typical example
(1) 6V-3075 Dial indicator
(2) 6V-9058 Fixture assembly
(8) Rocker arm adjustment screw
(9) Rocker arm adjustment screw locknut
Put 6V-3075 Dial Indicator (1) that is installed in 6V-9058 Fixture Assembly (2) into position on the fuel injector. Make sure that the magnetic base of the timing fixture is on the top surface of the fuel injector's retainer and that the contact point is on the top surface of shoulder (6). Note: The pointer on both dials on the dial indicator must indicate 0.00 0.20 mm (0.000 0.008 inch).
If the dial indicator pointers are within the range of 0.00 0.20 mm (0.000 0.008 inch), no adjustment is necessary. Proceed to Step 10.
If the dial indicator pointers are not within the range of 0.00 0.20 mm (0.000 0.008 inch), complete Steps 6 through 10.
Loosen the rocker arm adjustment screw locknut (9) on the fuel injector that requires adjustment.
Put 6V-3075 Dial Indicator (1) that is installed in 6V-9058 Fixture Assembly (2) into position on the fuel injector. Make sure that the magnetic base of the timing fixture is on the top surface of the fuel injector's retainer and that the contact point is on the top surface of shoulder (6).
Turn rocker arm adjustment screw (8) until the dial indicator indicates "0".
Tighten rocker arm adjustment screw locknut (9) to a torque of 200 25 N m (150 18 lb ft), and check the adjustment again. If necessary, do this procedure until the adjustment is correct.
Remove the timing pin from the crankshaft when the fuel timing check is completed.