Water Pump Impeller Repair Kit – Fits Mercury/Mariner 30-60 HP 4-Stroke Outboards (Replaces 812966A12, 14334A3)

Water Pump Impeller Repair Kit – Fits Mercury/Mariner 30-60 HP 4-Stroke Outboards

This water pump impeller repair kit provides a complete solution for servicing and rebuilding the water pump on Mercury/Mariner 30-60 HP 4-Stroke outboards (1998–present) and select Force 75 HP outboards (1988–1999, S/N 0E288000-0E344999). It is engineered to meet or exceed OEM specifications for reliable performance.

This kit is a direct replacement for Mercury part numbers 46-812966A12, 46-812966A10, 46-14334A3, 46-14334A2, 46-14334A1, 46-812966A6, 46-812966A5, 46-812966A4, and Sierra 18-3690.

• Complete Rebuild Kit: Includes all necessary components, such as the impeller, housing, gaskets, seals, and plate, for a full water pump overhaul.
• Durable Construction: Features a stainless steel housing and wear plate for excellent corrosion resistance and longevity in marine environments.
• Direct-Fit Installation: Designed as a direct replacement for the original factory parts, ensuring a precise fit without modifications.

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.

For Force engines, confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Housing (14334A3)
• 1 x Guide tube / Coupler (893857)
• 1 x Impeller (19453T)
• 2 x O-Ring (805726)
• 1 x Key (19699)
• 3 x Seal (830749)
• 2 x Washer (8M0204720)
• 1 x Water Pump Base Assembly (812966A7)
• 1 x Gasket, Lower (19701)
• 1 x Gasket (822189)
• 1 x Faceplate (19700A2)
• 4 x Washer (12-858234)

Installation Guide

1. Disconnect the Battery: Ensure the engine is off and disconnect the negative battery cable for safety.
2. Position the Lower Unit: Shift the outboard into neutral and place a container to catch gear lube.
3. Drain Gear Lube: Remove the upper and lower gear lube screws and allow the oil to drain completely.
4. Remove Lower Unit: Unbolt the lower unit (gearcase) from the engine leg. Keep track of all bolts and their locations.
5. Disassemble the Water Pump: Carefully remove the bolts securing the old water pump housing and slide it off the driveshaft.
6. Inspect and Clean: Remove the old impeller, gaskets, and wear plate. Thoroughly clean the driveshaft and all mating surfaces.
7. Install New Components: Install the new gaskets, base, wear plate, and key. Slide the new impeller onto the driveshaft, rotating it in a clockwise direction to seat the vanes correctly.
8. Install New Housing: Lightly lubricate the inside of the new housing and install it over the impeller, ensuring all seals and gaskets are properly aligned.
9. Reassemble: Re-install the bolts and tighten to the manufacturer's specified torque.
10. Reattach Lower Unit: Guide the driveshaft back into the engine and secure the lower unit with its mounting bolts.
11. Refill Gear Lube: Pump fresh gear lube into the lower unit through the bottom screw hole until it flows out of the top hole, then reinstall both screws.
12. Final Check: Reconnect the battery. Start the engine in a water source (using "earmuffs" or in the water) and verify a strong, steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific engine?
A: The most reliable method is to match your engine's serial number to the ranges listed in the "Compatible Engine Models" table. If your serial number falls within the specified range for your model, this kit will fit.

Q: What are the signs that my water pump is failing?
A: Common signs include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, or a high-temperature alarm from your helm gauges.

Q: How often should I replace my water pump impeller?
A: As a general rule, it's recommended to replace your impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval may be shorter if you operate in sandy, silty, or saltwater conditions.

Q: What is the main difference between this kit and the OEM version?
A: This aftermarket kit is manufactured to the same specifications as the original OEM part but is available at a more competitive price. It provides a cost-effective solution for maintaining your engine's cooling system without compromising on quality or performance. The OEM (Quicksilver) part costs roughly $182, while this kit offers significant savings.

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.