Sherwood 10615K Impeller Kit – Fits Multiple Marine Engines (Replaces 835874, 18948-0001)

Sherwood 10615K Impeller Kit – Fits Multiple Marine Engines (Replaces 835874, 18948-0001)

This Sherwood 10615K impeller kit is a high-quality replacement part for raw water cooling pumps on a wide range of inboard marine engines. It is designed for consistent performance in brands including Volvo Penta, Crusader, Pleasurecraft Marine, Onan, and many others.

This component is a direct replacement for several OEM and aftermarket part numbers, ensuring broad compatibility for various marine applications. It is crucial for maintaining engine temperature and preventing overheating.

• Features a durable neoprene impeller with 12 vanes for efficient water flow.
• Designed for a keyed drive (5/8" shaft) installation.
• The complete kit includes the impeller, O-ring, and gaskets for a comprehensive service.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Volvo Penta

Crusader

Pleasurecraft Marine

Other Compatible Applications

Technical Specifications

Package Contents

• 1 x Impeller (Sherwood 10615)
• 1 x O-Ring (Sherwood 12231)
• 1 x Set of Gaskets
• 1 x Technical Guide (some packages)
• 1 x Keyway (varies by vendor)
• 4 x Stainless Steel Hex Bolts (varies by vendor)
• 4 x Stainless Steel Spring Lock Washers (varies by vendor)
• 1 x Tube of Impeller Lube (varies by vendor)

Installation Guide

1. Shut off the engine completely and close the raw water intake seacock.
2. Locate and access the raw water pump assembly.
3. Carefully remove the screws holding the pump's end cover plate.
4. Using needle-nose pliers or an impeller puller tool, grip the hub of the old impeller and pull it straight out of the housing.
5. Clean the interior of the impeller housing and the cover plate to remove any old gasket material or debris.
6. If your kit includes a new key, install it onto the pump shaft.
7. Liberally apply the provided impeller lubricant to the inside of the pump housing and all surfaces of the new impeller.
8. Insert the new impeller into the housing. Bend the blades in the natural direction of the pump's rotation as you push it in.
9. Place the new O-ring or gasket into the groove on the pump body or cover plate.
10. Reinstall the end cover plate and tighten the screws in a star pattern to ensure even pressure. Do not overtighten.
11. Important: Open the raw water seacock before starting the engine.
12. Start the engine and immediately check for any water leaks around the pump cover. Confirm that water is flowing from the exhaust outlet.

Troubleshooting & FAQ

How do I know if this impeller fits my specific engine?
First, check your existing part number against our 'Part Number Cross-Reference' table. Second, find your engine's brand, model, and other details in the 'Compatible Engine Models' tables above. If your part number and engine model are listed, it should fit. Always visually compare the product images to your old part.

What is the purpose of the keyway in the impeller?
The keyway is a small slot in the impeller's central bore that matches a metal key on the pump's driveshaft. This locks the impeller onto the shaft, ensuring it spins with the shaft to pump water. An incorrect or worn key can cause the impeller to slip and fail.

How often should I replace my raw water impeller?
It is highly recommended to inspect your impeller annually and replace it as part of your regular preventative maintenance schedule, regardless of engine hours. Neoprene can harden, crack, or wear over time, and failure can lead to rapid engine overheating.

OEM vs. Aftermarket?
This listing is an aftermarket replacement part (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 (unused & 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.
• 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.