Water Pump Impeller Repair Kit – Fits Mercury/Tohatsu 2–3.5 HP (Replaces 16159A2, 8M0080264, 3AB-87322-0)

Water Pump Impeller Repair Kit – Fits Mercury/Tohatsu 2–3.5 HP

This water pump impeller repair kit is designed for specific Mercury Marine and Tohatsu/Nissan outboard models. It provides a direct replacement solution for maintaining your engine’s cooling system. This kit includes all necessary components for a standard water pump service.

This kit is a direct replacement for Mercury part numbers 16159A2, 8M0080264, and 889246A16, as well as Tohatsu part numbers 3AB-87322-0, 3AB873220M, 3F0-87322-1, and 3F0873221M.

• Installation Method: Direct Replacement
• Core Components: Includes a CR-Neoprene impeller, stainless steel wear plate, and gaskets.
• Engine Compatibility: Fits select 2-stroke and 4-stroke engines from Mercury, Tohatsu, and Nissan.

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.

Confirm your engine model/year in the table below.

Mercury Marine

Tohatsu/Nissan

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (47-161543)
• 1 x Impeller Pin (28-16155)
• 1 x Housing Gasket (27-898101331)
• 1 x Wear Plate Gasket (27-898101332)
• 1 x Wear Plate (898101371)
• 1 x Insert Cup (161571)

Installation Guide

1. Disconnect Power: Disconnect the battery and spark plug wire(s) to prevent accidental starting.
2. Access Lower Unit: Remove the lower unit (gearcase) from the outboard motor. This typically involves removing several bolts.
3. Remove Old Pump Housing: Unbolt and remove the water pump housing to expose the impeller.
4. Inspect and Clean: Carefully inspect the housing, wear plate, and surrounding areas for damage, corrosion, or debris. Clean all surfaces thoroughly.
5. Remove Old Impeller: Slide the old impeller, pin, and gaskets off the driveshaft.
6. Install New Components: Install the new gaskets, wear plate, pin, and impeller from the kit. Ensure the impeller vanes are oriented correctly (typically by turning the driveshaft clockwise during installation).
7. Reassemble Housing: Re-install the water pump housing and tighten the bolts to the manufacturer's specified torque.
8. Reattach Lower Unit: Reattach the lower unit to the engine, ensuring the driveshaft and shift shaft are correctly aligned.
9. Test Operation: Reconnect the battery and spark plugs. Start the engine in water and verify that a steady stream of water is exiting the tell-tale port.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific engine?

A: The best way is to match your engine's model, year, and serial number against our compatible models table. For Mercury engines, use the provided serial number guide to verify your model. If you are unsure, check your OEM part number against our cross-reference list.

Q: What are the symptoms of a failing water pump impeller?

A: Common signs include the engine overheating at idle or low speeds, a weak or intermittent water stream from the tell-tale (peephole), and in severe cases, a steam or high-temperature alarm.

Q: How often should I replace my water pump impeller?

A: As a general rule, it's recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).

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.