850420A 1 Mercruiser PULLEY (INCLUDES NUT AND KEY)

1. Remove the four bolts that hold the tube for the air cleaner to the hood. Remove the clip that holds the top radiator tube to the hood. Fasten nylon straps and a hoist to hood (1). Remove the four bolts that hold the hood in place, and remove the hood. The weight of the hood for the 943 is 25 kg (55 lb.). The weight of the hood for the 953 is 30 kg (66 lb.). 2. Fasten a nylon strap and hoist to grille (3). Remove brackets (2) and grille (3). 3. Disconnect the wires from lights (4). Remove lights (4) and guards (5) from the guard on the radiator. Disconnect the wire for lights and back-up alarm at the bottom of the guard. 4. Install tooling (A) on the guard, and fasten a hoist as shown. Remove bolts (6). 5. Remove bolts (8) from both sides of guard (7). Remove guard (7) from the radiator guard. The weight of the guard for the 943 is 29 kg (65 lb.). The weight of the guard for the 953 is 34 kg (75 lb.).6. Drain the coolant from the radiator. 7. Remove guard (9) below the radiator. 8. Remove two bolts and spacers (12). Loosen hose clamp (10), and disconnect hose (11) from the tube. 9. Loosen hose clamp (13), and disconnect the top hose from the radiator.10. Remove six bolts (14) from the channel assembly. Remove two bolts (15) from the clamp. 11. Remove bolts (19), and move hydraulic oil cooler (20) away from the radiator.
Tooling (A) must be fastened to frame (16) not to the radiator core.
12. Fasten tooling (A) and a hoist to frame (16).13. Remove the clips that hold wire (17) and oil line (18) to frame (16).14. Carefully remove frame (16) and the radiator as a unit. Weight is approximately 54 kg (120 lb.). Put the frame and radiator on blocks to prevent damage to the lower radiator hose. 15. Remove tooling (A) from frame (16), and fasten tooling (A) to the radiator core. Fasten a hoist to tooling (A).16. Remove the two bolts and spacers from the bottom of the radiator core. Remove bolts (21) and plate (22) from the frame. Remove the radiator core from the frame.Install Radiator
1. Fasten tooling (A) and a hoist to the radiator core. Put the radiator core in position in frame (1). Install the two bolts and spacers in the bottom of the radiator. Install the plate and the remainder of the bolts that hold the radiator core to the frame.2. Remove tooling (A) from the radiator core, and install tooling (A) on frame (1), and fasten a hoist. 3. Put the radiator and frame (1) in position in the radiator guard. Put the clips on the oil line to the oil cooler in position on frame (1), and install the bolts that hold the clips in place. Put the wire for the left light and clips in position on frame (1), and install the bolts that hold the clips in place. 4. Install eight bolts (2) that hold the frame for the radiator core to channel (3).5. Connect the top radiator hose to the radiator, and tighten hose clamp (4). 6. Connect the bottom radiator hose to tube (5), and tighten hose clamp (6).7. Install two spacers and bolts (7) that hold the frame for the radiator core to the radiator guard. 8. Install guard (8) below the radiator. 9. Put hydraulic oil cooler (10) in position, and install the bolts that hold it in place.10. Fasten tooling (A) and a hoist to guard (9). Put guard (9) in position on the radiator guard, and install the bolts in holes (11). 11. Install bolts (12) in both sides of the guard. Remove the hoist and tooling (A) from the guard. 12. Install guards (13) for the lights on the radiator guard.13. Connect the wires to lights (14), and install the lights in guards (13). Connect the wires for the lights and back-up alarm at the bottom of the guard.14. Install the grille. 15. Fasten nylon straps and a hoist to hood (15). Put the hood in position on the machine, and install the four bolts that hold it in place.16. Install the clip that holds the top radiator tube to the hood. Put the tube for the air cleaner in position on the hood, and install the four bolts that hold it in place.17. Fill the radiator to the correct level with coolant.END BY:a. install muffler