{"product_id":"water-pump-impeller-kit-fits-westerbeke-marine-generators-3-3-15-0kw-replaces-034440-34440","title":"Water Pump Impeller Kit – Fits Westerbeke Marine Generators 3.3-15.0kW (Replaces 034440, 34440)","description":"\u003cstyle\u003e\/* Outer container allows horizontal scrolling (with iOS momentum) *\/.ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\/* Base table styles *\/table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }table.ss-table th, table.ss-table td {padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;}\/* Key: prevent wrapping, word breaks, and vertical text in headers *\/table.ss-table th {white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc;}\/* Small screen optimization *\/@media (max-width:480px){table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }}\u003c\/style\u003e\u003csection\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eWater Pump Impeller Kit – Fits Westerbeke Marine Generators 3.3-15.0kW (Replaces 034440, 34440)\u003c\/strong\u003e is designed for Westerbeke marine generators from 3.3kW to 15.0kW manufactured prior to March 2004. It is engineered specifically for models equipped with the 33636 sea water pump that has an irregular-shaped cover.\u003c\/p\u003e\n\u003cp\u003eThis kit serves as a direct replacement for Westerbeke part numbers 034440 and 34440, and also interchanges with Sierra part 23-3307.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls in the raw water (sea water) pump to ensure proper engine cooling.\u003c\/li\u003e\n\u003cli\u003eMade from durable neoprene to withstand the marine environment.\u003c\/li\u003e\n\u003cli\u003eKit includes the impeller, gasket, and necessary mounting screws for a complete service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e34440\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e23-3307\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e233307\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor Westerbeke Owners:\u003c\/strong\u003e This part is exclusively for generator models produced up to 2004 that use a sea water pump with an irregular (non-round) cover plate. Please verify your pump design before ordering.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated kW\u003c\/th\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eOEM Part No.\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e3.3 WMD\u003c\/td\u003e\n\u003ctd\u003e3.3kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.0 BCD\u003c\/td\u003e\n\u003ctd\u003e4.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.0 BCD\u003c\/td\u003e\n\u003ctd\u003e4.0kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.0 BCDA\u003c\/td\u003e\n\u003ctd\u003e4.0kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.0 BCDB\u003c\/td\u003e\n\u003ctd\u003e4.0kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.4 BCD\u003c\/td\u003e\n\u003ctd\u003e4.4kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.4 WMD\u003c\/td\u003e\n\u003ctd\u003e4.4kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.5 BCD\u003c\/td\u003e\n\u003ctd\u003e4.5kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e5.0 BCD\u003c\/td\u003e\n\u003ctd\u003e5.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e5.0 BCDA\u003c\/td\u003e\n\u003ctd\u003e5.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e5.0 BCDB\u003c\/td\u003e\n\u003ctd\u003e5.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e5.7 BTD\u003c\/td\u003e\n\u003ctd\u003e5.7kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e5.8 WMD\u003c\/td\u003e\n\u003ctd\u003e5.8kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e6.0 BTD\u003c\/td\u003e\n\u003ctd\u003e6.0kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e6.0 BTDA\u003c\/td\u003e\n\u003ctd\u003e6.0kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e6.0 WMD\u003c\/td\u003e\n\u003ctd\u003e6.0kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e7.5 BTD\u003c\/td\u003e\n\u003ctd\u003e7.5kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e7.5 BTDA\u003c\/td\u003e\n\u003ctd\u003e7.5kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e7.6 BTD\u003c\/td\u003e\n\u003ctd\u003e7.6kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e7.7 WMD\u003c\/td\u003e\n\u003ctd\u003e7.7kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.0 BTD\u003c\/td\u003e\n\u003ctd\u003e8.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.0 BTDA\u003c\/td\u003e\n\u003ctd\u003e8.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.0 WMD\u003c\/td\u003e\n\u003ctd\u003e8.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.3 BTD\u003c\/td\u003e\n\u003ctd\u003e8.3kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.3 WMD\u003c\/td\u003e\n\u003ctd\u003e8.3kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e9.4 BTD\u003c\/td\u003e\n\u003ctd\u003e9.4kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e9.4 BTDA\u003c\/td\u003e\n\u003ctd\u003e9.4kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e9.4 BTDB\u003c\/td\u003e\n\u003ctd\u003e9.4kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e9.4 WMD\u003c\/td\u003e\n\u003ctd\u003e9.4kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e10.0 BTD\u003c\/td\u003e\n\u003ctd\u003e10.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e10.0 BTDA\u003c\/td\u003e\n\u003ctd\u003e10.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e11.0 BTD\u003c\/td\u003e\n\u003ctd\u003e11.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e11.0 WMD\u003c\/td\u003e\n\u003ctd\u003e11.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.0 BTDC\u003c\/td\u003e\n\u003ctd\u003e12.0kW\u003c\/td\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5 BTD\u003c\/td\u003e\n\u003ctd\u003e12.5kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5 BTDA\u003c\/td\u003e\n\u003ctd\u003e12.5kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5 BTDB\u003c\/td\u003e\n\u003ctd\u003e12.5kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5 WMD\u003c\/td\u003e\n\u003ctd\u003e12.5kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e15.0 BTDC\u003c\/td\u003e\n\u003ctd\u003e15.0kW\u003c\/td\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003ctd\u003eUp to 2004\u003c\/td\u003e\n\u003ctd\u003e034440\u003c\/td\u003e\n\u003ctd\u003eFor pumps with irregular cover only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater Pump Impeller Kit\u003c\/dd\u003e\n\u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eRaw Water\/Sea Water Pump\u003c\/dd\u003e\n\u003cdt\u003eImpeller Material\u003c\/dt\u003e\n\u003cdd\u003eNeoprene\u003c\/dd\u003e\n\u003cdt\u003eDrive Type\u003c\/dt\u003e\n\u003cdd\u003eSlotted Shaft Pin Drive\u003c\/dd\u003e\n\u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n\u003cdd\u003e6\u003c\/dd\u003e\n\u003cdt\u003eImpeller Height\u003c\/dt\u003e\n\u003cdd\u003e22 mm (0.88 inch)\u003c\/dd\u003e\n\u003cdt\u003eOverall Diameter\u003c\/dt\u003e\n\u003cdd\u003e50.8 mm (2 inches)\u003c\/dd\u003e\n\u003cdt\u003eShaft Diameter\u003c\/dt\u003e\n\u003cdd\u003e12 mm (0.47 inch)\u003c\/dd\u003e\n\u003cdt\u003eHousing Compatibility\u003c\/dt\u003e\n\u003cdd\u003eIrregular Cover Only (Pre-March 2004)\u003c\/dd\u003e\n\u003cdt\u003ePump Application\u003c\/dt\u003e\n\u003cdd\u003eSea Water Pump Number 33636\u003c\/dd\u003e\n\u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 Year\u003c\/dd\u003e\n\u003c\/dl\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Water Pump Impeller (034440)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Pump Cover Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e SS Hex\/Slot Screws\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThis impeller and gasket are for pre-March 2004 Westerbeke pumps with an irregular-shaped cover. It will \u003cstrong\u003eNOT\u003c\/strong\u003e fit pumps made after March 2004 that use a round cover with an O-ring seal; those models require impeller kit 48500.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eClose the seacock to prevent water from entering the vessel.\u003c\/li\u003e\n\u003cli\u003eRemove the screws from the water pump cover plate.\u003c\/li\u003e\n\u003cli\u003eCarefully remove the cover and old gasket. Note the direction of the old impeller's blades.\u003c\/li\u003e\n\u003cli\u003eUse pliers or an impeller puller to remove the old impeller.\u003c\/li\u003e\n\u003cli\u003eClean the inside of the pump housing and the cover plate, checking for any scoring or damage.\u003c\/li\u003e\n\u003cli\u003eLightly lubricate the new impeller with water-based lubricant or glycerine.\u003c\/li\u003e\n\u003cli\u003eInsert the new impeller into the housing, rotating it in the direction of engine operation to bend the blades correctly.\u003c\/li\u003e\n\u003cli\u003ePlace the new gasket on the pump body.\u003c\/li\u003e\n\u003cli\u003eReinstall the cover plate and tighten the screws in a star pattern to ensure even pressure.\u003c\/li\u003e\n\u003cli\u003eOpen the seacock, start the engine, and immediately check for any leaks around the pump cover.\u003c\/li\u003e\n\u003c\/ol\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I know if this impeller fits my Westerbeke generator?\u003c\/summary\u003e\u003cp\u003eThis impeller is specifically for Westerbeke generators (3.3kW to 15.0kW) manufactured \u003cstrong\u003ebefore\u003c\/strong\u003e March 2004 that have a raw water pump with an irregular-shaped cover held on by screws. It will not fit pumps with a round cover and O-ring seal, which are found on newer models.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat are the signs of a failing water pump impeller?\u003c\/summary\u003e\u003cp\u003eCommon signs include the engine running hotter than normal, reduced water flow from the exhaust port, visible cracks or missing blades on the impeller upon inspection, or an impeller that has become hard and brittle.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow often should I replace my impeller?\u003c\/summary\u003e\u003cp\u003eFor preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years. If your generator runs for extended periods or operates in silty water, more frequent replacement may be necessary.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the difference between this kit and the Westerbeke 48500 kit?\u003c\/summary\u003e\u003cp\u003eThis kit (034440) is for the older style pumps with an irregular cover. The Westerbeke 48500 kit is for newer models (post-March 2004) that use a completely different pump design featuring a round cover with an O-ring seal.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for consistency.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify images and specifications against your original part before purchasing. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement part, not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection\u003e\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — We offer free standard delivery to most regions, with typical transit times of 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717900636475,"sku":"24FIK262","price":19.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/24FIK262.png?v=1762937866","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-westerbeke-marine-generators-3-3-15-0kw-replaces-034440-34440","provider":"SeaSierra","version":"1.0","type":"link"}