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Flexible Rubber Water Pump Impeller 1210-0001 – 12 Blade Neoprene 57 mm 12-Spline – Fits Johnson 09-1027B
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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 12-tooth splined shaft. It replaces the primary original part number Jabsco 1210-0001, and is also supplied against Johnson 08-1027B / 09-1027B, JMP 7100-01, DJ 08-21-1201 and Yanmar 129470-42530.
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 12-spline hub, not a key drive and not a pin drive)
3. Pump model (cast or labelled on the pump body)
4. Engine or generator model code (on the identification plate)
Identify it physically before ordering. This impeller has twelve vanes moulded in black neoprene around a machined brass 12-spline insert. JMP 7100-01 is 57 mm diameter, 31.5 mm width and 16 mm (5/8 in.) bore. It is not interchangeable with the 12-blade key-drive JMP 7110-01 (57 × 20 × 12.7 mm) or with nitrile Jabsco 1210-0003.
- ✓ Primary OEM: Jabsco 1210-0001
- ✓ Product form: 12-blade neoprene impeller, brass 12-spline insert, 16 mm bore
- ✓ Fitment: part number, then drive type, then pump model
Part Number Cross-Reference
Use this table to confirm equivalent part numbers. Jabsco 1210-0001-P and JMP 7100-01K are kit numbers. This listing is the impeller only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Jabsco Pump | 1210-0001 | Primary reference. Profile K. 1210-0001-P is the kit number. 1210-0003 is nitrile, not this listing |
| OEM | Jabsco Pump | 1210-0001-P | Source-sheet kit number. This listing does not include gasket or O-ring |
| OEM | Johnson Pump (SPX Flow) | 08-1027B / 09-1027B | 12-spline impeller |
| OEM | JMP Pump | 7100-01 | Bare impeller. JMP 7100-01K is a kit |
| OEM | DJ Pump | 08-21-1201 | 12-blade spline equivalent |
| OEM | Kashiyama | SP-30 | Source-sheet number. JMP also lists KP-30 for the same impeller |
| OEM | Yanmar | 129470-42530 | JMP 7100-01 equivalent. Match this number on the old impeller |
| OEM | Yanmar | 129470-42531 / 129470-42532 | JMP 7100-01 equivalent |
| OEM | Yanmar | 129670-42530 | JMP 7100-01 equivalent |
| OEM | Yanmar | 127610-42270 | Source-sheet number. Confirm on the old impeller |
| OEM | Yanmar | 129670-42610 | Source-sheet number. JMP lists 129670-42531 for this size, not 42610. Confirm on the old part |
| OEM | Caterpillar | 232-3198 | Also written 2323198. JMP JPR-CT0150 pump family |
| OEM | Northern Lights | 12-12060 / 25-12060 | JMP 7100-01 equivalent. JMP JPR-NL10IP / JPR-NL10IP2 |
| OEM | Nikkiso | F15CBC | JMP 7100-01 equivalent |
| OEM | Cummins Onan | 131-0050 / 132-0162 | JMP 7100-01 equivalent |
| OEM | Perkins | 0460038 / 24880190 | JMP 7100-01 equivalent |
| Other brand | Industry interchange | 888-134 | Source-sheet other-brand number for this SKU |
Compatible Engine Models
Confirm the original impeller number and the 12-spline hub. Do not assume every Yanmar 3JH / 4JH or Volvo Penta D2 uses this part. Match the original number first.
| Brand | Engine / Pump Model | Original Part No. | Notes |
|---|---|---|---|
| Yanmar | Engines whose parts list calls for 129470-42530 / 42531 / 42532 or 129670-42530 (JMP JPR-YM04JHA / JPR-YM04JHB) | 129470-42530, 129470-42531, 129470-42532, 129670-42530 | Match the original number. Do not dump every 3JH / 4JH |
| Volvo Penta | Pumps specified for 825940 / 860203 / 875811 (JMP JPR-VP0020D) | 825940, 860203, 875811 | JMP equivalent list. Confirm the original impeller number |
| Northern Lights | Generators whose parts list calls for 12-12060 or 25-12060 (JMP JPR-NL10IP) | 12-12060, 25-12060 | Match the original number |
| Caterpillar | Pumps specified for 232-3198 (JMP JPR-CT0150) | 232-3198 | Match the original number |
| Cummins Onan / Perkins | Engines and generators specified for 131-0050, 132-0162, 0460038 or 24880190 | 131-0050, 132-0162, 0460038, 24880190 | JMP 7100-01 equivalent list |
Technical Specifications
| Specification | Value |
|---|---|
| Part type | Flexible rubber impeller, raw water pump |
| Number of blades | 12 |
| Impeller diameter (A) | 57 mm (2-1/4 in.) |
| Impeller width / depth (B) | 31.5 mm (1-1/4 in.) |
| Shaft bore diameter (C) | 16 mm (5/8 in.) |
| Insert / drive type | 12-tooth spline drive |
| 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. Jabsco 1210-0001-P and JMP 7100-01K add those service parts. 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 or O-ring together so you can compare the seal size when reassembling.
- 3 Note the spline orientation, 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 12-tooth spline in the brass insert with the pump shaft, then press the impeller in while turning the shaft in the normal direction of rotation so all twelve 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 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-spline, 16 mm bore impeller. It will not fit the 12-blade key-drive JMP 7110-01 (12.7 mm) or nitrile 1210-0003.
- 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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