Sierra 23-3307 Impeller Kit For Westerbeke Sierra high-quality replacement Impeller Kit for Westerbeke Generators. Interchangeable with Weaterbeke 34440 Application Westerbeke 10.0 BTD60HZ7.5 BTD50HZ 10.0 BTDA60HZ 7.5 BTDA50HZ 11.0 BTD60HZ8.3 BTD50HZ 11.0 WMD60HZ8.3 WMD50HZ 12.5 BTD60HZ9.4 BTD50HZ 12.5 BTDA60HZ9.4 BTDA50HZ 12.5 BTDB60HZ 9.4 BTDB50HZ 12.5 WMD60HZ9.4 WMD50HZ 15.0 BTDC60HZ 12.0 BTDC50HZ 4.0 BCD60HZ 4.4 BCD60HZ 4.4 WMD60HZ3.3 WMD50HZ 5.0 BCDBCDABCDB60HZ4.0 BCDBCDABCDB50HZ 6.0 BCD