This is Soxa-Marine sea water pump Impeller and Oring Seals for Westerbeke Generators Engine Raw Sea Cooling Water Pumps. Replacement Westerbeke Marine water pump impeller OEM Number 48500 , 048500 , 48254 , 048254 Fits Pumps WB-048080, WB-037431, WB-046814, 048080, 037431, 046814 , 48080, 37431, 46814 models The WB-048500 replaces old part number WB-048254 raw water pump impeller kit for pump WB-048080, WB-037431, WB-046814 can be used for the following Westerbeke generator and engine models: 4.0 BCD - 50 Hz, 4.0 BCD - 60 Hz Only, 5.0 BCD - 50 Hz, 5.0 BCD - 60 Hz, 5.5 BCD 20.0 BED - 50 Hz, 25.0 BED - 60 Hz 5.0 BTD - 50 Hz, 5.7 BTD - 50 Hz, 6.0 BTD - 50 Hz, 6.5 BTD, 7.5 BTD - 50 Hz, 7.6 BTD, 8.0 BTD, 8.3 BTD - 50 Hz, 9.2 BTD - 50 Hz, 9.4 BTD - 50 Hz, 10.0 BTD, 10.4 BTD - 50 Hz, 11.0 BTD, 11.5 BTD, 12.5 BTD - 60 Hz, 12.6 BTD 6.0 BTDA - 50 Hz, 7.5 BTDA - 50 Hz, 8.0 BTDA, 9.4 BTDA - 50 Hz, 10.0 BTDA, 12.0 BTDA - 50 Hz, 12.5 BTDA, 15.0 BTDA 9.4 BTDB - 50 Hz, 12.0 BTDB - 50 Hz, 12.5 BTDB, 15.0 BTDB 12.0 BTDC - 50 Hz, 15.0 BTDC 3.3 WMD - 50 Hz, 4.4 WMD, 4.5 WMD - 50 Hz, 5.8 WMD - 50 Hz, 6.0 WMD - 50 Hz, 7.7 WMD, 8.0 WMD, 11.0 WMD, 12.5 WMD" Package Include: Same as the picture shown Water Pump Impeller 48500 , 048500 , 48254 , 048254 Pump Cover Screw 34463 Cover O-Ring 48359