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Flexible Rubber Water Pump Impeller 22799-0001 – 6 Blade Neoprene 51 mm Key Drive – Fits Yanmar 124223-42091
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How to Match This Part
This is a flexible rubber raw water pump impeller. It sits inside the pump housing behind the cover plate and is driven by a keyed shaft (a rectangular keyway in the brass insert). It replaces the primary original part number Jabsco 22799-0001, and is also supplied against JMP 7052-01, DJ 08-37-0601 and Yanmar 124223-42091 / 124223-42092 / 128296-42070.
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 key drive, not a pin drive and not a D-bore)
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 with a single keyway. JMP 7052-01 is 51 mm diameter, 22 mm width and 12.7 mm (1/2 in.) bore. It is not interchangeable with pin-drive 51 × 22 mm impellers such as 653-0001 or 18673-0001, or with the 8 mm single-flat 6303-0001 / Yanmar 14242-050.
- ✓ Primary OEM: Jabsco 22799-0001
- ✓ Product form: 6-blade neoprene impeller, brass insert, 12.7 mm key drive
- ✓ Fitment: part number, then drive type, then pump model
Part Number Cross-Reference
Use this table to confirm equivalent part numbers. Jabsco 22799-0001-P and JMP 7052-01K are kit numbers. This listing is the impeller only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Jabsco Pump | 22799-0001 | Primary reference. Profile G. 22799-0001-P is the kit number |
| OEM | JMP Pump | 7052-01 | Bare impeller. JMP 7052-01K adds gasket GAK0031 and lubricant |
| OEM | DJ Pump | 08-37-0601 | Official DJ size 51 × 22 × 12.7 mm, 6 blades |
| OEM | Yanmar | 124223-42091 | JMP 7052-01 equivalent. Match this number on the old impeller |
| OEM | Yanmar | 124223-42092 | JMP 7052-01 equivalent |
| OEM | Yanmar | 128296-42070 | JMP 7052-01 equivalent |
| OEM | Yanmar | 128620-42200 | Source-sheet number. JMP official 7526-01 for this PN is a 79 × 54 × 20 mm 9-blade spline impeller, not this listing. Confirm on the old part |
| OEM | Yanmar | 14242-050 | Source-sheet number. This is the 8 mm single-flat 6303-0001 / JMP 7053-01 impeller, not this key-drive part |
| OEM | Kohler | 250872 / 229955 | JMP 7052-01 equivalent list |
| Aftermarket | Johnson Pump | 09-827B | Key-drive interchange listed against 7052-01 / 22799-0001 |
| Aftermarket | Sierra | 18-8950 / 23-2003 / 23-3304 | JMP 7052-01 equivalent list |
| Other brand | Industry interchange | 888-143A | Source-sheet other-brand number for this SKU |
Compatible Engine Models
Confirm the original impeller number and the 12.7 mm keyway. Do not assume every Yanmar 2GM / 3GM uses this part. Many of those pumps take 104211-42070 (9.5 mm pin), 128990-42200 (12 mm pin) or 14242-050 (8 mm D-flat).
| Brand | Engine / Pump Model | Original Part No. | Notes |
|---|---|---|---|
| Yanmar | Engines whose parts list calls for 124223-42091, 124223-42092 or 128296-42070 (reported on 2QM20, 2GM20F, 3GM30F, 3HM35) | 124223-42091, 124223-42092, 128296-42070 | Match the original number. Do not order this impeller for a 104211-42070, 128990-42200 or 14242-050 pump |
| Jabsco Pump | Pumps specified for impeller 22799-0001 | 22799-0001 | Key drive, 12.7 mm bore, 6 blades |
| JMP Pump | Pumps specified for impeller 7052-01 | 7052-01 | 51 × 22 × 12.7 mm key drive |
| Kohler | Generator / engine pumps specified for 250872 or 229955 | 250872, 229955 | JMP 7052-01 equivalent list. Confirm the original impeller number |
Technical Specifications
| Specification | Value |
|---|---|
| Part type | Flexible rubber impeller, raw water 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) | 12.7 mm (1/2 in.) |
| Insert / drive type | Key drive (single rectangular keyway) |
| 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 and lubricant are not included. JMP 7052-01K adds gasket GAK0031 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, let it cool, and close the raw water seacock 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 position of the key 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 keyway in the brass insert with the key on the 12.7 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, tighten the screws evenly in a crisscross pattern, open the seacock, then start the engine and confirm a solid stream of cooling water 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 a 12.7 mm key drive. It will not fit a pin-drive pump (653-0001, 18673-0001) or the 8 mm D-flat 6303-0001 / 14242-050.
- 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.
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For our typical US and Canadian customers , our shipping timeframes are as follows:
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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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