Water Pump Repair Kit – Fits Mercury 75–150 HP 4-Stroke Outboards (Replaces 8M0094529, 8M0094259, 8M0057715)

Water Pump Repair Kit – Fits Mercury 75–150 HP 4-Stroke Outboards (Replaces 8M0094529, 8M0094259, 8M0057715)

This complete water pump repair kit is engineered for specific Mercury/Mariner 75–115 HP 4-Stroke (2.1L) outboards (serial number 2B094996 and up) and 150 HP EFI 4-Stroke models (serial number 1B905505 and up). It provides all necessary components for a full service of the lower unit's water pump assembly.

This kit is a direct replacement for Mercury OEM part numbers 8M0094529, 8M0094259, and 8M0057715. It also cross-references with aftermarket parts from GLM (12161) and XRmarine (AM8M0094529).

• Installation Type: Direct replacement designed to meet or exceed OEM specifications.
• Engine Compatibility: Specifically for 4-stroke engines; this kit is not compatible with 2-stroke models.
• Complete Assembly: Includes the upper and lower housings, impeller, face plate, gaskets, seals, and key for a comprehensive overhaul.

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 Complete Water Pump Kit including:
• 1 x Upper Housing
• 1 x Lower Housing
• 1 x Impeller (Part No: 47-43026T2)
• 1 x Face Plate
• 1 x Key
• 1 x Set of Gaskets
• 1 x Set of Seals

Installation Guide

1. Disconnect the negative battery cable and shift the outboard into the neutral position.
2. Remove the lower unit (gearcase) by unfastening the bolts that connect it to the engine's midsection. You may also need to disconnect the speedometer tube and shift linkage.
3. With the lower unit on a suitable workbench, remove the bolts securing the water pump housing cover.
4. Carefully lift the old water pump housing, impeller, and wear plate off the driveshaft, observing the orientation of the impeller vanes.
5. Thoroughly clean the driveshaft and the housing mounting surface, ensuring all old gasket material and debris are removed.
6. Install the new gaskets, wear plate, and driveshaft key included in the kit.
7. Slide the new impeller onto the driveshaft. While turning the driveshaft clockwise, lower the new housing over the impeller to correctly seat the vanes.
8. Press the housing down firmly and tighten the bolts to the manufacturer-specified torque.
9. Reinstall the lower unit, carefully aligning the driveshaft, water tube, and shift shaft before securing it.
10. Reconnect the battery and test the engine with a reliable water source (like flushing muffs) to confirm proper water flow from the telltale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Mercury engine?
A: Verify your engine's serial number. This kit is made for 75-115 HP 4-stroke models with serial numbers 2B094996 and up, and 150 HP EFI models with serials 1B905505 and up. You should also cross-reference your existing part number with 8M0094529, 8M0094259, or 8M0057715 to ensure a match.

Q: What are the signs my water pump is failing and needs replacement?
A: Key symptoms include your engine overheating at idle or low speeds, a weak or inconsistent water stream from the "telltale" outlet, or discovering the impeller is brittle, cracked, or has missing vanes during a routine inspection.

Q: How often should the water pump impeller be replaced?
A: As part of preventative maintenance, we recommend inspecting and replacing the water pump impeller and gaskets every 100 operating hours or annually, whichever comes first, even with low usage.

Q: OEM vs. Aftermarket?
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.

Q: How fast do you ship and how much does it cost?
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.

Q: What is your warranty and return policy?
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.