Sierra 23-3307 Impeller Kit For WesterbekeSierra high-quality replacement Impeller Kit for Westerbeke Generators.Interchangeable with: Weaterbeke; 34440; Application:Westerbeke 10.0 BTD(60HZ)/7.5 BTD(50HZ) ; 10.0 BTDA(60HZ) / 7.5 BTDA(50HZ) ; 11.0 BTD(60HZ)/8.3 BTD(50HZ) ; 11.0 WMD(60HZ)/8.3 WMD(50HZ) ; 12.5 BTD(60HZ)/9.4 BTD(50HZ); 12.5 BTDA(60HZ)/9.4 BTDA(50HZ); 12.5 BTDB(60HZ) / 9.4 BTDB(50HZ) ; 12.5 WMD(60HZ)/9.4 WMD(50HZ) ; 15.0 BTDC(60HZ) / 12.0 BTDC(50HZ) ; 4.0 BCD(60HZ) ; 4.4 BCD(60HZ) ; 4.4 WMD(60HZ)/3.3 WMD(50HZ) ; 5.0 BCD/BCDA/BCDB(60HZ)/4.0 BCD/BCDA/BCDB(50HZ) ; 6.0 BCD(60HZ)/4.5 BCD(50HZ) ; 7.6 BTD(60HZ)/5.7 BTD(50HZ) ; 7.7 WMD(60HZ)/5.8 WMD(50HZ) ; 8.0 BTD(60HZ)/6.0 BTD(50HZ) ; 8.0 BTDA(60HZ) / 6.0 BTDA(50HZ) Only for engines older than March 2004; 8.0 WMD(60HZ)/6.0 WMD(50HZ);