801761757 Mercruiser SUPPORT

2. Loosen the clamps that hold hose (1) in place. Move hose (1) away from the elbow.3. Disconnect hose (2). 4. Close valve (3).5. Remove four bolts (5) that hold the water pump to the adapter.6. Fasten a hoist to the water pump. Remove four bolts (4) that hold the water pump to the front drive housing, and remove the water pump. The weight of the water pump is 37 kg (82 lb). The following steps are for installation of the water pump.7. Make sure the gasket for the adapter and the O-ring seal on the water pump are in position. Put clean engine oil on the O-ring seal.8. Fasten a hoist to the water pump. Put the water pump in position on the engine, and install the bolts that hold it.9. Install bolts (4) to hold the adapter to the water pump.10. Open valve (3).11. Connect hose assembly (2) to the water pump.12. Put hose (1) in position and tighten the clamps that hold it in place.13. Fill the cooling system with coolant to the correct level. See the Maintenance Manual.Disassemble & Assemble Water Pump
Start By:a. remove water pump 1. Remove O-ring seal (4) from the back of housing assembly (3).2. Remove washer (1) that holds shaft assembly (2) in housing assembly (3).
Typical Example3. Remove cover (5) from housing assembly (3). Remove the O-ring seal from cover (5).
Typical Example4. Loosen nut (7) and the washer that hold impeller (6) to the pump shaft. Use tooling (A) to loosen impeller (6) from the end of the pump shaft. Remove tooling (A), nut (7), the washer and impeller (6) from the pump shaft and housing assembly (3).
Typical Example5. Remove spring (9) from seal assembly (8) and shaft assembly (2).6. Use a soft hammer, and push shaft assembly (2) out of seal assembly (8) and housing assembly (3). Remove seal assembly (8) from housing assembly (3). 7. Remove ceramic seal (10) from the rubber ring. Remove the rubber ring from housing assembly (3). 8. Remove seal (11) from the back of housing assembly (3). The following steps are for assembly of the water pump. 9. If necessary, make a replacement of the two filters in the pump housing at location (12).10. If necessary, make a replacement of plug (13) and the seal.11. Use tool group (B) to install the seal in the housing assembly. Make sure the lip of the seal is toward the outside as shown. Put clean engine oil on the lip of the seal.12. Install shaft assembly (2) in housing assembly (3). Install washer (1) and the bolts to hold shaft assembly (2) in position.
Clean water only is permitted for use as a lubricant for assembly. Do not damage or put hands on the wear surface of the carbon ring or the ceramic ring. Install the ceramic ring with the smoothest face of the ring toward the carbon seal assembly.
13. Put ceramic seal (10) in position in the rubber ring. Use hand pressure and the tool (which is with the replacement seal) to install the ceramic seal.14. Remove the spring from seal assembly (8). Use hand pressure and the tool (which is with the replacement seal) to install the seal assembly. Push the seal assembly on the shaft until the seal faces make light contact.15. Install spring (9) on the carbon seal assembly.16. Put impeller (6) in position on the pump shaft as shown.17. Install the washer and nut (7). Tighten nut (7) to a torque of 200 25 N m (150 18 lb ft).18. Make sure the studs for cover (5) are tightened to a torque of 27 4 N m (20 3 lb ft) in the pump housing.19. Put clean engine oil on the O-ring seal, and install it on cover (5). Put cover (5) in position, and install the nuts to hold it to the pump housing.End By:a. install water pump