Water Pump Impeller – Fits Johnson/Evinrude 85-300 HP (Replaces 395864, 397131)

$19.99

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Water Pump Impeller – Fits Johnson/Evinrude 85-300 HP (Replaces 395864, 397131) is backordered and will ship as soon as it is back in stock.

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You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

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Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This Water Pump Impeller – Fits Johnson/Evinrude 85-300 HP (Replaces 395864, 397131) is an essential replacement part designed for a wide range of Johnson/Evinrude V4, V6, and V8 outboard engines manufactured from 1973 to the present.

It serves as a direct aftermarket replacement for OEM part numbers Johnson/Evinrude 395864, 397131, 435821, 435748, 439948, 5001593, as well as Sierra 18-3059 and GLM 89620.

Ensures a direct fit inside the original pump housing for straightforward installation.
Constructed from durable neoprene rubber to withstand the marine environment.
Includes the necessary impeller key (#18-3299) for a complete installation.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Johnson/Evinrude	395864
Johnson/Evinrude	397131
Johnson/Evinrude	435821
Johnson/Evinrude	435748
Johnson/Evinrude	439948
Johnson/Evinrude	5001593
Sierra	18-3059
GLM	89620

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This impeller is designed for a wide variety of Johnson and Evinrude engines. Please verify that your model and OEM part number are listed.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Johnson/Evinrude	V4	85	2-Stroke	1973–1977	395864
Johnson/Evinrude	V4	88	2-Stroke		395864
Johnson/Evinrude	V4	90	2-Stroke	1979–1981	395864
Johnson/Evinrude	V4	100	2-Stroke		395864
Johnson/Evinrude	V4	110	2-Stroke		395864
Johnson/Evinrude	V4	112	2-Stroke		395864
Johnson/Evinrude	V4	115	2-Stroke	1973–1976	395864
Johnson/Evinrude	V4	130	2-Stroke		395864
Johnson/Evinrude	V4	135	2-Stroke	1973–1975	395864
Johnson/Evinrude	V4	140	2-Stroke		395864
Johnson/Evinrude	V6	150	2-Stroke		395864
Johnson/Evinrude	V6	170	2-Stroke		395864
Johnson/Evinrude	V6	175	2-Stroke		395864
Johnson/Evinrude	V6	200	2-Stroke		395864
Johnson/Evinrude	V6	225	2-Stroke		395864
Johnson/Evinrude	V6	235	2-Stroke		395864
Johnson/Evinrude	V8	300	2-Stroke		395864

Technical Specs

Product Type: Water Pump Impeller
Installation: Direct fit in pump housing
Housing Material: Neoprene rubber
Other Technical Attributes: Includes impeller key (#18-3299)

What’s in the Box

1 x Water Pump Impeller (395864/397131/5001593)
1 x Impeller Key (18-3299)

Installation Notes

Disconnect the engine's battery before starting work.
Remove the lower unit (gearcase) from the outboard's driveshaft housing.
Locate and unbolt the water pump housing to access the impeller.
Carefully inspect the wear plate and housing for grooves, warping, or cracks. Replace if damaged.
Slide the old impeller off the driveshaft and remove the old impeller key.
Clean the driveshaft and housing surfaces thoroughly.
Install the new impeller key and slide the new impeller onto the driveshaft, turning it in the direction of engine rotation to seat the blades.
Reassemble the water pump using new gaskets and torque bolts to manufacturer specifications.
Reinstall the lower unit, ensuring all connections are secure.
Test the cooling system by running the engine in water and verifying a strong stream from the tell-tale outlet.

Troubleshooting & FAQ

How do I know if this impeller fits my engine?

This impeller fits a broad range of Johnson/Evinrude V4, V6, and V8 engines (85-300 HP) from 1973 to current. The best way to confirm fitment is to match your engine's original part number to one of the equivalents listed in our Part Number Matrix, such as 395864 or 397131. Always cross-reference with the compatibility table provided.

What are the signs of a failing water pump impeller?

Common symptoms include a weak or non-existent water stream from the "telltale" outlet, engine overheating alarms, a melted water pump housing, or visibly cracked, brittle, or worn-down impeller blades upon inspection.

How often should I replace my impeller?

As a crucial part of preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years or after every 100-200 hours of operation. Replacement frequency may vary based on usage conditions (e.g., saltwater versus freshwater and sandy or debris-heavy waters).

Is the drive key included with this impeller?

Yes, this kit includes one new impeller drive key (#18-3299), which is required for proper installation on the driveshaft.

If my engine's year isn't listed, how can I confirm fitment?

If a specific year range for your model is not shown in the compatibility table, the most reliable confirmation method is matching the OEM part number. If your current part is identified as 395864 or one of its superseded numbers, this impeller is the correct replacement.

OEM vs. Aftermarket: What’s the difference?

This listing is for an aftermarket replacement, not an original equipment manufacturer (OEM) part. It is engineered to meet or exceed OEM-level specifications using comparable materials and manufacturing processes. Our parts are produced in an ISO 9002-certified facility and are batch-inspected for quality and consistency.

How fast is shipping and what does it cost?

We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free for all orders. Expedited shipping options and associated costs, where available, will be displayed at checkout.

What warranty and return policies apply?

This product is covered by a 1-year warranty against manufacturing defects under normal use conditions. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. Please see our dedicated policy page or contact us for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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