Flexible Rubber Water Pump Impeller 653-0001 – 6 Blade Neoprene 51 mm Pin Drive – Fits Johnson 09-810B, Yanmar

How to Match This Part

This is a flexible rubber raw water pump impeller for marine engine and generator sea water cooling pumps. It sits inside the pump housing behind the cover plate and is driven by a pin through a slotted shaft. It replaces the primary original part number Jabsco 653-0001, and is also supplied against Johnson 09-810B / 09-810B-1, JMP 7050-01, DJ Pump 08-39-0601, Yanmar 128990-42200 / 128397-42200 and Northern Lights 25-18325.

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 on the old impeller (this listing is 6 blades)
3. Raw water pump model (cast or labelled on the pump body, for example Johnson F4B)
4. Engine or generator model code (on the identification plate)

Identify it physically before ordering. This impeller has six straight vanes moulded in black neoprene around a machined brass insert. DJ Pump publishes 51 mm diameter, 22 mm width and 12 mm (0.47 in.) bore. JMP 7050-01 is the same 51 × 22 mm envelope with a slotted-shaft pin drive. It is not interchangeable with the ten-blade Jabsco 18653-0001 / JMP 7070-01 of the same outside size, or with the smaller 9.5 mm Yanmar 104211-42070 impeller used on many Japanese-built 2GM / 3GM pumps.

• ✓ Primary OEM: Jabsco 653-0001
• ✓ Product form: 6-blade neoprene impeller, brass insert, 12 mm pin drive
• ✓ Fitment: part number, then blade count, then pump model

Part Number Cross-Reference

Use this table to confirm equivalent part numbers. Jabsco 653-0001-P is the genuine retail kit of 653-0001. This listing is the impeller only. Numbers marked as ten-blade cousins are on the source sheet for search, not as a substitute for this six-blade part.

Compatible Engine Models

Confirm the original impeller number. Many Yanmar 2GM / 3GM engines use the smaller 9.5 mm 104211-42070 impeller instead of this 51 mm part. Match 128990-42200 or 128397-42200 on the old impeller before ordering.

Technical Specifications

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, cover screws and lubricant are not included. Genuine Jabsco 653-0001-P and JMP 7050-01K kits add those service parts. If your service procedure calls for a new cover seal, order it separately against your pump model.

Installation Guide

1. 1 Stop the engine or generator, 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 from the sea water pump 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 drive pin orientation, then grip the brass insert of the old impeller with an impeller puller or two flat-blade screwdrivers and pull it straight off the shaft. Recover any broken vane pieces from the heat exchanger inlet 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 slot in the brass insert with the drive pin on the 12 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. 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 steady water discharge 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 plate seals, gaskets and lubricant must be ordered separately if your service procedure requires them.
• Count the vanes. Ten-blade 18653-0001 / 7070-01 is a different part with the same outside size.
• Do not order this impeller for a Yanmar pump that uses 104211-42070 (9.5 mm shaft, smaller 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.