Water Pump Impeller Kit with Housing – Fits MerCruiser Alpha & Bravo Engines (Replaces 46-807151A14, 807151A7)

Water Pump Impeller Kit with Housing – Fits MerCruiser Alpha & Bravo Engines (Replaces 46-807151A14, 807151A7)Water Pump Impeller Kit with Housing Fits MerCruiser Alpha & Bravo Engines (Replaces 46 807151A14, 807151A7) This water pump impeller kit with housing is designed for MerCruiser Alpha and Bravo sterndrives and various inboard engines from 1987 to 2016. It is compatible with models that use a one piece plastic, engine mounted sea water pump assembly, including V6 and V8 engines such as the 4. 3L, 5. 0L, 5. 7L, 6. 2L, 7. 4L, and 8. 2L. This kit is a

Water Pump Impeller Kit with Housing – Fits MerCruiser Alpha & Bravo Engines (Replaces 46-807151A14, 807151A7)

This water pump impeller kit with housing is designed for MerCruiser Alpha and Bravo sterndrives and various inboard engines from 1987 to 2016. It is compatible with models that use a one-piece plastic, engine-mounted sea water pump assembly, including V6 and V8 engines such as the 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, and 8.2L.

This kit is a direct replacement for MerCruiser part numbers 46-807151A14 and 46-807151A7. It also replaces popular aftermarket parts, including Sierra 18-3150, Quicksilver 807151A14, GLM 12088, and Mallory 9-48350.

• Complete Assembly: Includes the housing, impeller, wear plate, O-rings, and installation bolts for a full replacement.
• Durable Construction: The housing is manufactured from a high-strength, two-step phenolic resin compound for longevity in marine environments.
• Installation Profile: Designed for engines equipped with a one-piece engine-mounted sea water pump.

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. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Water Pump Housing (Replaces 46-807151A14)
• 1 x Water Pump Impeller
• 1 x Wear Plate
• 1 x Installation Bolts with Washers
• 1 x O-Rings

Installation Guide

1. Safety First: Disconnect the boat’s battery and close the fuel or water seacock before beginning.
2. Drain System: Drain the cooling system to prevent spills.
3. Remove Belt: Loosen the tensioner and remove the serpentine belt from the sea water pump pulley.
4. Disconnect Hoses: Carefully disconnect the intake and output hoses from the pump housing.
5. Remove Old Pump: Unbolt and remove the entire one-piece water pump assembly from the engine block.
6. Clean Surface: Thoroughly clean the engine mounting surface to ensure a proper seal.
7. Prepare New Pump: Lubricate the new impeller and insert it into the new housing. Install the wear plate and O-rings.
8. Mount New Pump: Install the new pump assembly onto the engine, tightening the bolts to the manufacturer-specified torque.
9. Reconnect: Re-attach the hoses and reinstall the serpentine belt, ensuring correct tension.
10. Final Checks: Reconnect the battery, open the seacock, and start the engine. Check immediately for any leaks and verify proper water flow/pressure.

Troubleshooting & FAQ

A: First, verify your engine model and year falls within the 1987–2016 range listed in the compatibility table. Second, confirm your engine uses a one-piece plastic sea water pump housing. Finally, you can cross-reference your existing part number with the numbers on our list, such as MerCruiser 46-807151A14 or Sierra 18-3150.

A: The most common signs are the engine overheating at idle or low speeds, a weak or non-existent stream of water from the tell-tale outlet, and a noticeably lower water pressure reading on your gauges. Upon inspection, a worn impeller may be cracked, brittle, or have missing blades.

A: As a crucial preventative maintenance item, we recommend inspecting the impeller annually. For optimal reliability, replacing the impeller every 1-2 years or 100-200 hours of operation is advisable. It's good practice to replace the housing when it shows signs of wear, warping, or scoring to ensure proper sealing and pressure.

A: This kit is designed to be a direct replacement for the original OEM one-piece plastic housing. It is made from a durable, corrosion-proof phenolic resin compound that meets or exceeds original specifications for performance and longevity in a marine environment.

A: 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.

A: 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.

A: 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.