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Flexible Rubber Water Pump Impeller 11979-0001 – 8 Blade Neoprene 65 mm Spline Drive – Fits JMP 7200-01
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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 splined shaft. It replaces the primary original part number Jabsco 11979-0001, and is also supplied against JMP 7200-01, DJ 08-40-0801 and Yanmar 122610-42021.
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. Blade count (this listing is 8 blades)
3. Drive type (this listing is a 12-spline hub, not a key drive)
4. Pump model (cast or labelled on the pump body — Jabsco 18930 / 18940 / 17200 family)
Identify it physically before ordering. This impeller has eight vanes moulded in black neoprene around a machined brass spline insert. JMP 7200-01 is 65 mm diameter, 37 mm width and 16 mm (5/8 in.) bore. Jabsco 11979-0001 is Profile M. It is not interchangeable with 12-blade 57 mm Jabsco 1210-0001 or 62.5 mm key-drive 18838-0001.
- ✓ Primary OEM: Jabsco 11979-0001
- ✓ Product form: 8-blade neoprene impeller, brass 12-spline insert, 37 mm width
- ✓ Fitment: part number, then blade count, then drive type
Part Number Cross-Reference
Use this table to confirm equivalent part numbers. Jabsco 11979-0001-P and JMP 7200-01K are kit numbers. This listing is the impeller only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Jabsco Pump | 11979-0001 | Primary reference. Profile M. 11979-0001-P is the kit number |
| OEM | JMP Pump | 7200-01 | Bare impeller. JMP 7200-01K is a kit |
| OEM | DJ Pump | 08-40-0801 | 8-blade spline equivalent |
| OEM | Yanmar | 122610-42021 | JMP 7200-01 equivalent. Match this number; do not dump 3JH / 4JH families |
| Other brand | Industry interchange | K-113 | Source-sheet other-brand number |
| Other brand | Industry interchange | 888-113 | Source-sheet other-brand number for this SKU |
Compatible Engine Models
Confirm the original impeller number and the 8-blade 12-spline hub. Do not assume every Yanmar inboard uses this part.
| Brand | Engine / Pump Model | Original Part No. | Notes |
|---|---|---|---|
| Jabsco | 18930-0000 / 18930-0010 / 18930-0020, 18940-0010, 17200-0001 | 11979-0001 | 8-blade, 12-spline, 65 × 37 × 16 mm |
| Yanmar | Engines whose parts list calls for 122610-42021 | 122610-42021 | Match the original number. Do not dump 3JH / 4JH |
| Chrysler Marine | LM318 / LM340 with Jabsco 18940-0010 pump | 11979-0001 | Confirm the pump model on the housing |
Technical Specifications
| Specification | Value |
|---|---|
| Part type | Flexible rubber impeller, raw water pump |
| Number of blades | 8 |
| Impeller diameter (A) | 65 mm (2-9/16 in.) |
| Impeller width / depth (B) | 37 mm (1-7/16 in.) |
| Shaft bore diameter (C) | 16 mm (5/8 in.) |
| Insert / drive type | Spline drive (12) |
| 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 gasket, O-ring and lubricant are not included. Jabsco 11979-0001-P and JMP 7200-01K 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 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 splines 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 eight 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 an 8-blade, 65 mm 12-spline impeller. It will not fit 12-blade 57 mm Jabsco 1210-0001 or 62.5 mm key-drive 18838-0001.
- 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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