0303791 EVINRUDE SCREW, Clamp base air silencer

1. Remove four bolts (4).2. Remove elbow (5) and pipe (6). Remove the gasket from between elbow (5) and water pump (3). Remove the O-ring seals from pipe (6). Check the gasket and the O-ring seals for wear or damage and replace with new parts if necessary.3. Remove four bolts (1) and gasket (2). Check the gasket for wear or damage and replace with a new part if necessary. 4. Remove four nuts (7).5. Remove one bolt (8).6. Remove water pump (3) from the front housing.Install Water Pump
1. Put water pump (3) in position on the front housing. Install four nuts (7) and one bolt (8) that hold water pump (3) to the front housing. 2. Put clean engine oil on the O-rings on pipe (6). Install the gasket on elbow (5). 3. Put elbow (5) and pipe (6) in position and secure with four bolts (4).4. Put gasket (2) in position and install four bolts (1) fastening water pump (3) to the discharge flange.Disassemble Water Pump
Start By:a. remove water pump FLUID SPILLAGE CONTAINMENTCare must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to "TOOLS AND SHOP PRODUCT GUIDE, NENG2500", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose fluids according to local regulations and mandates. 1. Remove the three bolts holding the water pump cover to the water pump. Remove the water pump cover. 2. Remove O-ring seal (1) from adapter (2).3. Remove adapter (2) with a screwdriver. Remove the seal from the edge of adapter (2).4. Remove bolt (3) and the washer. 5. Remove impeller (4) from the water pump housing with Tool (A). 6. Remove seal assembly (5). Remove ring and seal (6). 7. Remove the bolt and washer that hold gear (7) on the water pump shaft.8. Remove gear (7) with Tool (B).9. Remove bolts and retainer (9).10. Remove O-rings seal (8). 11. Remove shaft (10) and bearings as a unit.12. Remove bearing (11), spacer (12) and bearing (13) from shaft (10).13. Remove the lip seal from the gear side of the water pump. Remove ring and seal from the impeller side of the water pump.Assemble Water Pump
FLUID SPILLAGE CONTAINMENTCare must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to "TOOLS AND SHOP PRODUCT GUIDE, NENG2500", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose fluids according to local regulations and mandates. 1. Put clean oil or glycerin on the lip of seal (1). Install seal (1) as shown with Tool (A). 2. Install bearing (4), spacer (3) and bearing (5) on shaft (2). Install shaft (2) in the pump housing. 3. Install retainer (7) and O-ring seal (8).4. Install gear (6). Install the washer and bolt that hold gear (6) to shaft (2). 5. Put clean water on seal (9). Install seal (9) and ring (10) together in the housing bore with the shiny face of ring (10) toward the outside. 6. Remove spring (11) from seal (12). Put clean water on the inside of seal (12). Push the seal on the shaft until the carbon face makes contact with the shiny face or ring (10). Install spring (11). 7. Install impeller (14) and the washer and nut (13) that hold the impeller to the pump shaft.8. Tighten nut (13) to a torque of 39 N m (28 1 lb ft). 9. Put clean engine oil or glycerin on O-ring seals (15). Install the O-ring seals on adapter (16).10. Install adapter (16) in the pump housing with the notch in alignment with dowel (17). 11. Put the water pump cover in position and install the three bolts holding the water pump cover to the water pump.End By:a. install water pump