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Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444
Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444
Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444
Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444
Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444
Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444
Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444
Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444

Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444

Vendor: JLM Marine
Availability: In Stock
Product Type: Flexible Rubber Impeller
$49.20
$49.20
Subtotal: $49.20

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Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444

Flexible Rubber Water Pump Impeller 18958-0001 – 12 Blade Neoprene Key Drive – Fits Cummins 3802444

$49.20
Description

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. It replaces the primary original part number Jabsco 18958-0001, and is also supplied against JMP 7600-01, Johnson 09-704BT-1, DJ 08-19-1201 and Sherwood 17000.

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 brass key-drive hub, not a spline or pin drive)
4. Pump model (cast or labelled on the pump body)

Identify it physically before ordering. This impeller has twelve vanes moulded in black neoprene around a machined brass key-drive insert. JMP 7600-01 is 82.4 mm diameter, 73.4 mm width and 20 mm bore. It is a large-diameter key-drive impeller, not the 79 mm 9-blade spline 7526-01 and not a 16 mm Jabsco spline family part.

  • ✓ Primary OEM: Jabsco 18958-0001
  • ✓ Product form: 12-blade neoprene impeller, brass key-drive insert, 73.4 mm width, 20 mm bore
  • ✓ Fitment: part number, then blade count, then drive type

Part Number Cross-Reference

Use this table to confirm equivalent part numbers. Sherwood 17000K and Johnson 09-704BT-1 are kit-style numbers. This listing is the impeller only.

Type Brand Part Number Notes
OEM Jabsco Pump 18958-0001 Primary reference. 12-blade neoprene, key drive
OEM SPX Flow Johnson Pumps 09-704BT-1 Johnson kit-style number for this size. Impeller only is sold here
OEM JMP Pump 7600-01 JMP 12-blade key-drive equivalent
OEM DJ Pump 08-19-1201 12-blade key-drive equivalent
OEM Cummins Onan 3802444 Cummins Onan impeller number
OEM Cummins Onan 3897337 Cummins Onan impeller number
OEM Cummins Onan 3916852 Cummins Onan impeller number
OEM Cummins Onan 3925236 Cummins Onan impeller number
OEM Caterpillar 1W5664 CAT raw-water pump impeller
OEM Caterpillar 7E0321 CAT raw-water pump impeller
OEM Sherwood Pump 17000 Sherwood impeller only
OEM Sherwood Pump 17000K Sherwood kit number. Impeller only is sold here
Other brand Industry interchange J-108J Source-sheet other-brand number
Other brand Industry interchange 888-108J Source-sheet other-brand number for this SKU

Compatible Engine Models

Confirm the original impeller number and count twelve blades on a 20 mm key-drive hub. Do not assume every Cummins B / C series or Caterpillar 3116 / 3126 / 3208 uses this part.

Brand Engine / Pump Model Original Part No. Notes
Jabsco / Johnson / JMP / DJ / Sherwood Pumps specified for 18958-0001, 09-704BT-1, 7600-01, 08-19-1201 or 17000 18958-0001, 09-704BT-1, 7600-01, 08-19-1201, 17000 12-blade, key drive, 82.4 × 73.4 × 20 mm
Cummins Onan Engines whose parts list calls for 3802444, 3897337, 3916852 or 3925236 3802444, 3897337, 3916852, 3925236 Match the original number rather than a B-series or C-series dump
Caterpillar Engines whose parts list calls for 1W5664 or 7E0321 1W5664, 7E0321 Match the original number rather than a 3116 / 3126 / 3208 dump

Technical Specifications

Specification Value
Part type Flexible rubber impeller, raw water pump
Number of blades 12
Impeller diameter (A) 82.4 mm
Impeller width / depth (B) 73.4 mm
Shaft bore diameter (C) 20 mm
Insert / drive type Key drive
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 7600-01K adds an O-ring (ORG0030) and lubricant. Sherwood 17000K is a kit number; the impeller only is sold here.

Installation Guide

  1. 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. 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. 3 Note the keyway 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. 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. 5 Align the keyway in the brass insert with the pump shaft key, 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. 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

How do I confirm this fits my engine? +

Start from the original impeller number. If the old part is Jabsco 18958-0001, JMP 7600-01, Johnson 09-704BT-1, Sherwood 17000, Cummins 3802444 / 3897337 / 3916852 / 3925236, or Caterpillar 1W5664 / 7E0321, and the brass hub is a 20 mm key drive about 73 mm wide on an 82 mm 12-blade impeller, this part is the correct size.

Is this a spline impeller? +

No. This listing is a brass key-drive hub. It will not fit a 12-spline pump of similar diameter.

Will this fit every Cummins B / C series or CAT 3116 / 3126 / 3208? +

No. Only engines whose parts list calls for one of the original numbers in the cross-reference table. Match the original number.

What are the signs that my impeller needs replacing? +

The usual symptoms are a weak or intermittent stream of cooling water, rising engine temperature, and vanes that are cracked, flattened, hardened or missing on inspection. Flexible impellers are a wear item; inspect on a fixed service interval rather than waiting for failure.

Is this a kit or just the impeller? +

This listing is the impeller only. JMP 7600-01K and Sherwood 17000K are kit numbers that add seals. Photos of this SKU show the impeller on its own.

Is this an OEM or aftermarket part? +

This listing is an aftermarket replacement part and is not an OEM component. We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost? +

We offer fast global shipping, typically 5–15 days worldwide, and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy? +

This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window for unused items in original condition; please see our policy page or reach out for instructions.

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, 82.4 mm key-drive impeller, 73.4 mm wide with a 20 mm bore. It will not fit 9-blade spline 7526-01 or 16 mm-bore Jabsco spline impellers.
  • 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.
Shipping

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.

About JLM Marine

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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