Customer Service: info@jlm-marine.com
Free shipping. No Minimum Purchase
Flexible Rubber Water Pump Impeller 17370-0001 – 12 Blade Neoprene 95 mm Double Flat – Fits CAT 3N4859
- $69.60
- $69.60
- Unit price
- per
Couldn't load pickup availability
Free Shipping
Free standard shipping on all orders
Worry-Free Returns
Learn More.
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 double-flat shaft. It replaces the primary original part number Jabsco 17370-0001, and is also supplied against JMP 8300-01, DJ 088-1201 and CAT 3N4859 / 3N1888 / FP3N4859.
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 12 blades)
3. Drive type (this listing is a double-flat hub, 25 mm bore — not the 12-spline 8301-01)
4. Width (this listing is about 89 mm wide, not the 63 mm 95 mm-diameter family)
Identify it physically before ordering. This impeller has twelve vanes moulded in black neoprene around a machined brass double-flat insert. JMP 8300-01 is 95 mm diameter, 88.8 mm width and 25 mm bore. It is not interchangeable with spline-drive 8301-01 / 17936-0001 of the same envelope, or with 63 mm-wide 8101-01 of the same diameter.
- ✓ Primary OEM: Jabsco 17370-0001
- ✓ Product form: 12-blade neoprene impeller, brass double-flat insert, 88.8 mm width, 25 mm bore
- ✓ Fitment: part number, then drive type, then width
Part Number Cross-Reference
Use this table to confirm equivalent part numbers. JMP 8300-01K is a kit number. This listing is the impeller only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Jabsco Pump | 17370-0001 | Primary reference. 12-blade neoprene, double-flat |
| OEM | JMP Pump | 8300-01 | JMP 12-blade double-flat equivalent |
| OEM | DJ Pump | 088-1201 | 12-blade double-flat equivalent |
| OEM | Cummins Onan | 217308 | Cummins / Onan raw-water pump impeller |
| OEM | Cummins Onan | 3008503 | Source-sheet Cummins equivalent |
| OEM | Caterpillar | 3N4859 | CAT raw-water pump impeller |
| OEM | Caterpillar | 3N1888 | CAT equivalent |
| OEM | Caterpillar | FP3N4859 | Source-sheet CAT number |
| Other brand | Industry interchange | 206-1 | Source-sheet other-brand number |
| Other brand | Industry interchange | 888-206M | Source-sheet other-brand number for this SKU |
Compatible Engine Models
Confirm the original impeller number and count twelve blades on a 25 mm double-flat hub about 89 mm wide. Do not assume every CAT 3406, Cummins V903 or Detroit Diesel uses this part.
| Brand | Engine / Pump Model | Original Part No. | Notes |
|---|---|---|---|
| Jabsco / JMP / DJ | Pumps specified for 17370-0001, 8300-01 or 088-1201 | 17370-0001, 8300-01, 088-1201 | 12-blade, double-flat, 95 × 88.8 × 25 mm |
| Cummins Onan | Engines whose parts list calls for 217308 or 3008503 | 217308, 3008503 | Match the original number rather than a V903 dump |
| Caterpillar | Engines whose parts list calls for 3N4859, 3N1888 or FP3N4859 | 3N4859, 3N1888, FP3N4859 | Match the original number rather than a 3406 family dump |
Technical Specifications
| Specification | Value |
|---|---|
| Part type | Flexible rubber impeller, raw water pump |
| Number of blades | 12 |
| Impeller diameter (A) | 95 mm |
| Impeller width / depth (B) | 88.8 mm |
| Shaft bore diameter (C) | 25 mm |
| Insert / drive type | Double-flat |
| Insert material | Machined brass |
| Vane material | Neoprene rubber |
Package Contents
This listing is for the impeller only, as shown in the impeller in the product images. Please refer to the part number cross-reference table to confirm component details.
Cover gasket, O-ring and lubricant are not included. JMP 8300-01K adds gasket GAK0008, O-ring ORG0015 and lubricant; kit extras are not included.
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 double-flat 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 double flats 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, 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-blade, 95 mm double-flat impeller, 88.8 mm wide with a 25 mm bore. It will not fit spline-drive 8301-01 or 9-blade 8201-01 of the same envelope.
- 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.
Parts Finder
Use our Parts Finder to quickly locate the correct parts for your engine. Search by Make, HP, Stroke, Model, Year, and SN.
Select only the fields available — you don’t need to fill all options (e.g., leave Year blank if not applicable).
Our database is currently being updated and expanded. More models, including Yamaha, Mercury, and Suzuki, are being verified and uploaded.
Our database is currently being updated and expanded. More models, including Yamaha, Mercury, and Suzuki, are being verified and uploaded.
- Choosing a selection results in a full page refresh.