0337549 EVINRUDE EXHAUST HOUSING, 20 in., 90/115 Jet

1. Drain the coolant from the cooling system. 2. Disconnect hose (5) from elbow (4).3. Loosen clamps (6).4. Remove the bolts and retainers that hold tube (1) in place in elbow (4).5. Disconnect hose (3) from the elbow.6. Remove sensor (2).7. Remove the bolts that hold elbow (4) to cover (9). Remove the elbow. Remove the O-ring seal.8. Remove cover (9) and the O-ring seal.9. Disconnect hose assembly (7) from the water pump. Remove the O-ring seal.10. Fasten a hoist to water pump (8).11. Remove the bolts that hold the water pump in place. Remove the water pump. The weight of the water pump is 29 kg (64 lb). Remove the O-ring seal. The following steps are for installation of the water pump.12. Put clean engine oil on the O-ring seal. Install the O-ring seal.13. Fasten a hoist to water pump (8). Put the water pump in position and install the bolts.14. Put the O-ring seal in place. Connect hose (7) to the water pump.15. Install the O-ring seal and cover (9) to the water pump.16. Put clean engine oil on the O-ring seals. Make sure the O-ring seals are in position for tube (1) and cover (9).17. Put elbow (4) in position on tube (1) and the water pump. Install the bolts that hold the elbow to the cover.18. Install the retainers and bolts that hold tube (1) in position in the elbow.19. Put hose (6) in position on elbow (4), and tighten the clamps that hold it in place.20. Connect hose (5).21. Connect hose (3) to the elbow.22. Install sensor (2).23. Fill the cooling system with coolant to the correct level. See the Maintenance Manual.Disassemble Auxiliary Or Main 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).Assemble Auxiliary Or Main Water Pump
1. If necessary, make a replacement of the two filters in the pump housing at location (1).2. If necessary, make a replacement of plug (2) and the seal.
The cardboard sleeve is required to slightly stretch the inner diameter of the seal to prevent seal damage when installing the pump shaft. Remove the cardboard sleeve only when ready to install the shaft.
3. Use tool group (A) to install the seal in the housing assembly. Make sure the lip of the seal is toward the impeller. Put clean engine oil on the lip of the seal. 4. Install shaft assembly (3) in housing assembly (4). Install washer (5) and the bolts to hold shaft assembly (3) 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.
5. Put ceramic seal (6) in position in the rubber ring. Use hand pressure and the tool (which is with the replacement seal) to install the ceramic seal.
Typical Example6. Remove the spring from seal assembly (7). 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.
Typical Example7. Install spring (8) on the carbon seal assembly.8. Put impeller (9) in position on the pump shaft as shown.
Typical Example9. Install washer (11) and nut (10). Tighten nut (10) to a torque of 200 25 N m (150 18 lb ft). 10. Make sure the studs for cover (12) are tightened to a torque of 27 4 N m (20 3 lb ft) in the pump housing.11. Put clean engine oil on O-ring seal (13), and install it on cover (12). Put cover (12) in position, and install the nuts to hold it to the pump housing.End By:a. install water pump