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Flexible Rubber Water Pump Impeller 6303-0001 – 6 Blade Neoprene 51 mm Single Flat Drive – Fits Johnson 09-824P
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How to Match This Part
This is a flexible rubber raw water / utility pump impeller. 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 brass insert). It replaces the primary original part number Jabsco 6303-0001, and is also supplied against Jabsco 7273-0001, Johnson 09-824P, JMP 7053-01 and Yanmar 14242-050.
Match this part by checking your engine 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. Pump model (cast or labelled on the pump body)
4. Engine model code (on the identification plate)
Identify it physically before ordering. This impeller has six vanes moulded in black neoprene around a machined brass insert. JMP 7053-01 is 51 mm diameter, 22 mm width and 8 mm (5/16 in.) bore with a single flat drive. It is not interchangeable with pin-drive 51 × 22 mm impellers such as 653-0001 (12 mm pin) or 18673-0001 (12.7 mm pin), or with the smaller D-slot JMP 7013-01 (12 mm D-slot). JMP 7053-02 is the nitrile / bilge version of a related size, not this listing.
- ✓ Primary OEM: Jabsco 6303-0001
- ✓ Product form: 6-blade neoprene impeller, brass 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 6303-0001-P is the genuine retail kit of 6303-0001. This listing is the impeller only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Jabsco Pump | 6303-0001 | Primary reference. 6303-0001-P is the kit number. 6303-0003 is a nitrile / bilge impeller, not this listing |
| OEM | Jabsco Pump | 7273-0001 | Source-sheet second Jabsco number; same 6-blade single-flat size |
| OEM | Johnson Pump (SPX Flow) | 09-824P | Single flat drive impeller |
| OEM | JMP Pump | 7053-01 | Bare impeller. JMP 7053-01K is a kit (impeller plus ORG0052). 7053-02 is nitrile, not this listing |
| OEM | Yanmar | 14242-050 | Match this number on the old impeller. Do not assume every 1GM / 2GM / 3GM uses it |
| OEM | Oberdorfer | 6617 | JMP 7053-01 equivalent list |
| Aftermarket | CEF | 500210 | JMP 7053-01 equivalent list |
| Other brand | Industry interchange | 888-157 | Source-sheet other-brand number for this SKU |
Compatible Engine Models
Confirm the original impeller number and the single-flat bore. Yanmar 2GM / 3GM raw-water pumps more often use 104211-42070 or 128990-42200, which are different sizes.
| Brand | Engine / Pump Model | Original Part No. | Notes |
|---|---|---|---|
| Jabsco Pump | Pumps specified for impeller 6303-0001 / 7273-0001 | 6303-0001, 7273-0001 | 8 mm single-flat drive. Individual Water Puppy pump codes were not dual-sourced for this page |
| Johnson Pump | Pumps specified for impeller 09-824P | 09-824P | Single flat drive |
| Yanmar | Engines whose parts list calls for 14242-050 | 14242-050 | Match the original number. Do not order this impeller for a 104211-42070 or 128990-42200 pump |
| Oberdorfer | Pumps specified for impeller 6617 | 6617 | JMP Grade B cross-reference |
Technical Specifications
| Specification | Value |
|---|---|
| Part type | Flexible rubber impeller, raw water / utility 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 | Machined brass |
| Vane material | Neoprene rubber |
Package Contents
This listing is for the impeller only, as shown in the product images. Please refer to the part number cross-reference table to confirm component details.
Cover plate gaskets, O-rings and lubricant are not included. JMP 7053-01K adds O-ring ORG0052 and lubricant. If your service procedure calls for a new cover seal, order it separately against your pump model.
Installation Guide
- 1 Stop the engine or pump, let it cool, and close the raw water seacock if one is fitted so water cannot enter the boat while the pump is open.
- 2 Remove the cover plate screws and lift off the cover. Keep the screws and the old gasket together so you can compare the seal size when reassembling.
- 3 Note the orientation of the flat on the shaft, then grip the brass insert and pull the old impeller straight off. Recover any broken vane pieces from the downstream cooling circuit before continuing.
- 4 Clean the housing bore and the wear plate, and inspect them for scoring. Apply a marine-grade impeller lubricant, glycerine or soapy water to the bore and the new vanes. Do not use petroleum-based grease, which attacks neoprene.
- 5 Align the D-shaped bore in the brass insert 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, open the seacock, 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 an 8 mm single-flat drive. It will not fit a pin-drive pump (653-0001, 18673-0001) or the 12 mm D-slot JMP 7013-01.
- Never run the pump dry. Even a few seconds without water will damage the neoprene vanes.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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