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Flexible Rubber Water Pump Impeller 6303-0003 – 6 Blade Nitrile 51 mm Single Flat Drive – Fits Johnson 09-824P-9
- $28.80
- $28.80
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How to Match This Part
This is a flexible nitrile rubber impeller for oil-resistant bilge, waste, macerator and diesel-transfer pumps. It sits inside the pump housing behind the cover plate and is driven by a single flat on the shaft (a D-shaped bore in the hub). It replaces the primary original part number Jabsco 6303-0003, and is also supplied against Jabsco 7273-0003, Johnson 09-824P-9 and JMP 7033.
Match this part by checking your pump in this order:
1. Original impeller part number (stamped on the old impeller or listed in the pump section of your parts catalog)
2. Drive type (this listing is a single-flat / D-bore, not a pin drive)
3. Compound (this listing is nitrile for oil, diesel and contaminated water, not the neoprene 6303-0001 cooling impeller)
4. Pump model (cast or labelled on the pump body)
Identify it physically before ordering. This impeller has six vanes moulded in black nitrile around a plastic insert. Jabsco and JMP both list the size as 51 mm diameter, 22 mm width and 8 mm (5/16 in.) bore with a single flat drive. It is not interchangeable with the neoprene 6303-0001 / 7053-01 cooling impeller, with pin-drive 51 × 22 mm impellers such as 653-0001, or with the smaller 12 mm D-slot JMP 7013-01.
- ✓ Primary OEM: Jabsco 6303-0003
- ✓ Product form: 6-blade nitrile impeller, plastic insert, 8 mm single flat drive
- ✓ Fitment: part number, then drive type, then pump model
Part Number Cross-Reference
Use this table to confirm equivalent part numbers. Jabsco 6303-0003-P is the genuine retail kit of 6303-0003. This listing is the impeller only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Jabsco Pump | 6303-0003 | Primary reference. Profile H. 6303-0003-P is the kit number. 6303-0001 is the neoprene cooling impeller, not this listing |
| OEM | Jabsco Pump | 7273-0003 | Source-sheet second Jabsco number. Same 6-blade, 51 × 22 × 8 mm single-flat size; Jabsco charts list it as Profile G. Confirm profile on the old impeller |
| OEM | Johnson Pump (SPX Flow) | 09-824P-9 | Nitrile single-flat impeller. 09-824P without the -9 suffix is the neoprene cooling counterpart |
| OEM | JMP Pump | 7033 | Source-sheet JMP number, retained as supplied. Current JMP nitrile / bilge impeller for this size is 7053-02 |
| OEM | JMP Pump | 7053-02 | JMP current 6-blade, 51 × 22 × 8 mm single-flat bilge impeller. Replaces 6303-0003. 7053-01 is neoprene, not this listing |
| Aftermarket | Ancor | J050011 | JMP 7053-02 and Jabsco 6303-0003 equivalent lists |
| Other brand | Industry interchange | 888-157-N | Source-sheet other-brand number for this SKU. Manufacturer not independently verified |
Compatible Engine Models
This nitrile impeller is specified for bilge, waste, macerator and diesel-transfer pumps, not for Yanmar raw-water cooling pumps. Match the original impeller number and the 8 mm single-flat bore. Do not order this part for a pump that calls for neoprene 6303-0001 / 09-824P / 7053-01 / Yanmar 14242-050.
| Brand | Engine / Pump Model | Original Part No. | Notes |
|---|---|---|---|
| Jabsco Pump | Water Puppy, 37010-series electric toilets, macerators and diesel-transfer pumps specified for 6303-0003 | 6303-0003 | Nitrile, Profile H, plastic insert, 8 mm single-flat drive |
| Jabsco Pump | Pumps specified for impeller 7273-0003 (including 12520-0003 / 12520-1003 / 12520-0273 / 12520-1273 listed by Jabsco retailers) | 7273-0003 | Same size; confirm Profile G on the old impeller |
| Johnson Pump | Pumps specified for impeller 09-824P-9 | 09-824P-9 | Nitrile F4-size single-flat impeller. Do not substitute 09-824P (neoprene) |
| JMP Pump | Bilge / utility pumps specified for 7053-02 | 7053-02 | 51 × 22 × 8 mm, 6 blades, single flat. Source-sheet JMP number is 7033 |
Technical Specifications
| Specification | Value |
|---|---|
| Part type | Flexible rubber impeller, bilge / waste / diesel-transfer pump |
| Number of blades | 6 |
| Impeller diameter (A) | 51 mm (2 in.) |
| Impeller width / depth (B) | 22 mm (7/8 in.) |
| Shaft bore diameter (C) | 8 mm (5/16 in.) |
| Insert / drive type | Single flat drive (D-shaped bore) |
| Insert material | Plastic (Jabsco 6303-0003 / 7273-0003 specification) |
| Vane material | Nitrile rubber (oil- and diesel-resistant) |
| Jabsco profile | H on 6303-0003; G on 7273-0003. Confirm on the old impeller |
Package Contents
This listing is for the impeller only. Please refer to the part number cross-reference table to confirm component details.
Cover plate gaskets, O-rings and lubricant are not included. Some product photos of genuine Jabsco 6303-0003-P show a kit with gaskets, O-rings and lubricant; that kit packaging is not this listing. If your service procedure calls for a new cover seal, order it separately against your pump model.
Installation Guide
- 1 Isolate the pump, let it drain, and close any seacock or supply valve so fluid cannot enter the boat while the housing is open.
- 2 Remove the cover plate screws and lift off the cover. Keep the screws and the old gasket or O-ring together so you can compare the seal size when reassembling.
- 3 Note the orientation of the flat on the shaft, then grip the hub and pull the old impeller straight off. Recover any broken vane pieces from the discharge line before continuing.
- 4 Clean the housing bore and the wear plate, and inspect them for scoring. Apply a marine impeller lubricant or glycerine to the bore and the new vanes before fitting.
- 5 Align the D-shaped bore with the flat on the 8 mm pump shaft, then press the impeller in while turning the shaft in the normal direction of rotation so all six vanes lay over the same way.
- 6 Refit the cover plate with a serviceable gasket or O-ring, tighten the screws evenly in a crisscross pattern, restore the supply, then start the pump and confirm flow and no leaks at the cover.
Note: Professional installation is recommended to ensure safety and optimal performance.
Troubleshooting & FAQ
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist, even if your model is listed, do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- The impeller is supplied on its own. Cover seals and lubricant must be ordered separately if your service procedure requires them.
- This is nitrile, 8 mm single-flat drive. It will not substitute for neoprene 6303-0001, pin-drive 653-0001 / 18673-0001, or the 12 mm D-slot JMP 7013-01.
- Never run the pump dry. Even a few seconds without fluid will damage the vanes.
- Professional installation is recommended to ensure safety and optimal performance.
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