806553 Mercruiser SENDER-TACHOMETER PICK-UP

1. Remove access covers (1) from the sides of the engine. 2. Remove bolts (3) and caps (4) that hold fuel rods (2) to the fuel control shaft. 3. Remove bolts (5) to remove lever assembly (6) and fuel rod assembly (2) as a unit from the cylinder heads. If necessary, use tool (A) to turn the flywheel until the camshaft is moved in a position so that the fuel rod assembly can be removed between the engine block and camshaft. 4. Remove the cover over the camshaft drive gear (Right side only).5. Remove the bolt and plate (7) that fastens gear (8) to the camshaft. 6. Put the three washers from tooling (B) behind plate (7) and install the bolt and plate (7).
Do not apply more than 51675 kPa (7500 psi) pressure to 1P820 Hydraulic Puller. 8B7559 Adapters are rated at 6 1/2 ton each and 1P820 Hydraulic Puller is rated at 17 ton at 68,900 kPa (10000 psi). If to much pressure is applied, the gear may be damaged. Personal injury can also be the result.
7. Install tooling (B) on camshaft drive gear (8). Apply 51,675 kPa (7500 psi) to the puller and hit the screw part of the puller with a hammer until the gear is free of the camshaft taper. Remove tooling (B) and gears (8). 8. Remove bolts (9) and thrust washers (10) that fasten camshaft in the engine block. 9. Push the valve lifters up away from the camshaft into the cylinder head assemblies, and hold the lifters in position. O-ring seals (11) can be used to hold the valve lifters up. 10. Remove the bolts and cover (12) from the front of the engine.
Typical Example11. Install tooling (C) on each end of camshaft (13). Tooling (D) can be installed on the flywheel housing to remove the camshafts from the rear of the engine, or it can be installed on the front drive housing to remove the camshafts from the front of the engine.12. Install tool (D) on the flywheel housing as shown.13. Install tool (E) on one end of tooling (C).14. Pull the camshaft out while rotating it with tool (E). Pull the camshaft out of the engine until a hoist can be fastened to it. Remove camshaft (13) from the engine. The weight of the camshaft is 75 kg (165 lb). 15. Remove bolts (14). Separate the camshafts, and remove spacer (15).16. If necessary, remove the dowel from the end of the camshaft.Install Camshaft
Typical Example1. Put tool (A) in position on the flywheel housing as shown. Install the bolts that hold it. Do not tighten the bolts at this time.2. Install tool (B) on the end of camshaft (13).3. Install camshaft (13) in the engine until tool (B) is located in the first cam bearing.4. Rotate the camshaft, and tighten the bolts that hold tool (A) to the flywheel housing.5. Rotate the camshaft, and install it until the end of the camshaft is just out of tool (A).
Typical Example
Typical Example6. If dowel (16) was removed from camshaft (17), install the dowel in the camshaft. Install the dowel until the end of the dowel is 22.0 0.5 mm (.87 .02 in) above the surface of the camshaft. Make sure the camshafts are installed respective to the marks (rear L.H., rear R.H.) on the ends of the camshafts.7. Fasten a hoist to camshaft (17). Put spacer (15) and camshaft (13) in position on camshaft (17). Put 9S3263 Thread Lock on the threads of bolts (14). Install bolts (14) to hold the camshafts together. Tighten bolts (14) by hand to a torque of 55 7 N m (41 5 lb ft).8. Install tooling (B) and (C) on the end of camshaft (17).9. Rotate and install the camshaft the remainder of the way.10. Remove the tooling from the flywheel housing and camshaft. 11. Install washers (10) and bolts (9) to hold the camshafts in place.12. Remove timing pin (18) from the storage position on the side of the engine. 13. Turn the camshaft until timing pin (18) can be installed through the cylinder block and into groove (19) in the camshaft. 14. Remove cover (20) and plug (21) from the flywheel housing. 15. Put timing bolt (22) in position in the flywheel housing. Use tool (D) and a ratchet to turn the flywheel until the timing pin can be installed in the hole in the flywheel. The No. 1 cylinder is now at top dead center. When rotating the engine with tooling (D), it must turn in a counter-clockwise direction, as seen from the flywheel, to remove gear backlash. If the timing hole in the flywheel is missed, turn it clockwise a minimum of 30° before rotating it counter-clockwise. For correct timing, all gear clearance (backlash) must be removed. Turn camshaft drive gears (8) in the same direction as the crankshaft rotation and hold in this position.16. Put camshaft drive gears (8) in position and install adapter (23) (left side), plate (7) (right side) and bolts (24).17. Tighten bolts (24) as follows:a. Tighten the bolts to a torque of 360 40 N m (270 30 lb ft).b. Tap adapter (23) and plate (7) with a soft hammer to seat the gear taper on the camshaft.c. Retighten bolts (24) to a torque of 360 40 N m (370 30 lb ft).d. Repeat Steps b & c until the torque does not change.18. Install the gaskets and covers over the camshaft drive gears. Be sure the long bolts are installed through the holes in the cover with the dowels.19. Remove the timing pins from the camshafts, and install them in their storage positions.20. Install the eight seals and access covers on the sides of the engine block over the fuel control shafts.21. Remove the timing bolt from the flywheel, and install the plug in the timing hole. Remove tool (D) and install the cover on the flywheel housing. 22. Install the gasket and cover (12) on