Feature: 1. Replace Part: Replacement for Jabsco 18653‑0001, 653‑0001; replacement for Johnson 09‑810B‑1, 09‑810B1‑1, 09‑810B; replacement for Westerbeke 034440, 34440, etc. 2. Applicable Pumps: The water pump impeller is a replacement for Jabsco 29440‑1001, 29470‑2231C, 51520‑2001 Pumps, replacement for Johnson F4B 10‑24509‑01 10‑24509‑02 Pump. 3. Applicable Engine: Replacement for Westerbeke 4.0BCD 4.4BCD 4.4WMD, 5.0BCDA 5.0BCDB, 6.0BCD 7.6BTD 7.7WMD Engine, replacement for 2GM20‑YEU 2GM20C‑YEU Engines, etc. 4. Excellent Function: The flexible impeller is designed for marine water pumping, for instance, engine cooling, water transfer, wash down and bilge water pumping purposes, suitable for fresh or sea water. 5. Recommendation: Suggest replacing your flexible pump impellers at least once every year or sooner depending on the engine duty; always carrying spare impellers on board before boating activities. Specification: Item Type: Water Pump Impeller Material: Copper + Neoprene OEM: 18653-0001-P, 128990-42200 Replacement for Jabsco: 18653-0001, 653-0001 Replacement for Johnson: 09-810B-1, 09-810B1-1, 09-810B Replacement for Westerbeke: 034440, 34440 Replacement for Sierra: 18-45713 Replacement for Mallory: 9-45713 Replacement for CEF: 500101 Replacement for JMP: 7050-01 Blades: 6 Shaft Style: Slotted shaft pin drive Application: Cooling System (Water) Fitment: Replacement for Jabsco Pumps: 29440-1001 29470-2231C 51520-2001 Replacement for Johnson Pump: F4B 10-24509-01 10-24509-02 Replacement for Westerbeke Engine: 4.0BCD 4.4BCD 4.4WMD 5.0BCDA 5.0BCDB 6.0BCD 7.6BTD 7.7WMD 8.0BTD 8.0BTDA 8.0WMD 10.0BTD 10.0BTDA 11.0BTD 11.0WMD 12.5BTD 12.5BTDA 12.5BTDB 12.5WMD Replacement for Westerbeke Pumps: 033636 33636 Replacement for Engines: 2GM20-YEU 2GM20C-YEU 2GM20F-YEU, 2GM20FC-YEU 2YM15 3GM30-YEU 3GM30C-YEU 3GM30F-YEU 3GM30FC-YEU, 3YM20 3YM27A 3YM30 3YM30R Replacement for Pumps: 128377-42500 128397-42500. Package List: 1 x Water Pump Impeller Note: 1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!3. When installing, please lubricate with silicone grease, glycerin or detergent (above are not included).