SKU: 21188097922

Water Pump Impeller Kit – Fits Mercury, Mariner, Force, Sears 6-15 HP (Replaces 46-42089A5)

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Description

Water Pump Impeller Kit – Fits Mercury, Mariner, Force, Sears 6-15 HP (Replaces 46-42089A5)Water Pump Impeller Kit Fits Mercury, Mariner, Force, Sears 615 HP (Replaces 46 42089A5) This water pump impeller service kit is designed for Mercury Mariner 615 HP 2 Stroke (1986 and newer) and 815 HP 4 Stroke (19952004) outboard motors. It also fits select Force and Sears 9. 915 HP engines from the 1998 model year. This kit serves as a direct replacement for Mercury OEM part numbers 46 42089A5, 46 42089A4, and 46 42089A3, as well as aftermarket

Water Pump Impeller Kit – Fits Mercury, Mariner, Force, Sears 6–15 HP (Replaces 46-42089A5)

This water pump impeller service kit is designed for Mercury/Mariner 6–15 HP 2-Stroke (1986 and newer) and 8–15 HP 4-Stroke (1995–2004) outboard motors. It also fits select Force and Sears 9.9–15 HP engines from the 1998 model year.

This kit serves as a direct replacement for Mercury OEM part numbers 46-42089A5, 46-42089A4, and 46-42089A3, as well as aftermarket parts GLM 12051 and SEI Marine 96-261-01K. Please verify your engine's serial number for correct fitment.

  • Complete Service Kit: Includes a new neoprene impeller, pump housing, wear plate, gaskets, seals, and all necessary hardware for a full rebuild.
  • Engine Compatibility: Fits standard gear cases only; not compatible with Bigfoot models.
  • High-Quality Materials: Features a durable neoprene impeller for reliable water flow and a housing constructed from high-quality metal alloy for corrosion resistance.

Part Number Cross-Reference

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

Brand Part Number
Mercury 46-42089A5
Mercury 46-42089A4
Mercury 46-42089A3
GLM 12051
SEI Marine 96-261-01K

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.

Mercury/Mariner 2-Stroke

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercury/Mariner Standard 6 2-Stroke 1986–up 46-42089A5 S/N 0A197112 and up
Mercury/Mariner Standard 8 2-Stroke 1986–up 46-42089A5 S/N 0A197112 and up
Mercury/Mariner Standard 9.9 2-Stroke 1986–up 46-42089A5 S/N 0A197112 and up
Mercury/Mariner Standard 10 2-Stroke 1986–up 46-42089A5 XR10 models
Mercury/Mariner Standard 15 2-Stroke 1988–up 46-42089A5 S/N 0B292414 and up

Mercury/Mariner 4-Stroke

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercury/Mariner 232CC 8 4-Stroke 1995–2004 46-42089A5 S/N 0G760300-0T178499
Mercury/Mariner Non-Bigfoot 9.9 4-Stroke 1999–2004 46-42089A5 S/N 0G760300-0T979999
Mercury/Mariner Non-Bigfoot 15 4-Stroke 1998–2004 46-42089A5 323CC, S/N 0G590000-1B727495

Force/Sears

Brand Model Rated HP Stroke Years OEM Part No. Notes
Force Standard 9.9 2-Stroke 1998 46-42089A5 Also fits Sears models
Force Standard 15 2-Stroke 1998 46-42089A5 Also fits Sears models
Sears Standard 9.9 2-Stroke 1998 46-42089A5 Force-based models
Sears Standard 15 2-Stroke 1998 46-42089A5 Force-based models

Technical Specifications

Specification Value
Product Type Water Pump Impeller Repair Kit
Installation Standard Gear Case (Non-Bigfoot)
Material Metal alloy and neoprene rubber
Housing Material Finest quality metal alloy
Impeller Material Neoprene rubber
Dimensions 152 × 102 × 12.7 mm (6 × 4 × 0.5 in)
Weight 0.3 kg (10.5 ounces)
OEM Application Mercury/Mariner/MerCruiser/Force/Sears Outboard Motors
Package Type Rebuild kit with multiple components
Other Technical Attributes Compatible with standard gear cases only (Non-Bigfoot models)

Package Contents

  • 1 x Impeller (47-42038-2)
  • 1 x Wear Plate (42200)
  • 1 x Gasket (27-19202)
  • 1 x Gasket (27-19204-3)
  • 1 x Gasket (12-19183)
  • 1 x Gasket (19643)
  • 1 x Pump Base (46-420T5)
  • 1 x Pump Housing (46-42089A2)
  • 1 x Retainer (42375)
  • 2 x Oil Seal (26-41365-1)
  • 2 x Seal (26-33613/26-42133)
  • 1 x Screw (10-48408)
  • 2 x Washer (12-16448)
  • 1 x Quad Ring (25-822236)

Installation Guide

  1. Safety First: Disconnect the battery and spark plug wires to prevent accidental starting.
  2. Access the Lower Unit: Drain the gearcase oil. Remove the bolts securing the lower unit (gearcase) to the upper engine housing and carefully lower it.
  3. Disassemble the Water Pump: Unbolt and remove the water pump housing. Take note of the order of all components (seals, gaskets, impeller, keyway).
  4. Inspect and Clean: Clean all surfaces where gaskets will sit. Inspect the housing and wear plate for scoring, warping, or corrosion.
  5. Install New Components: Lightly grease the new gaskets and seals. Slide the new impeller into the housing while turning the driveshaft clockwise to bend the vanes correctly.
  6. Reassemble: Reinstall the pump housing, ensuring all parts are aligned. Torque the bolts to the manufacturer's specification.
  7. Reattach Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube align. Securely tighten the mounting bolts.
  8. Final Checks: Refill the gearcase with fresh oil. Reconnect the spark plug wires and battery. Test the engine in water, ensuring a steady stream of water from the tell-tale port.

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 compatibility tables. This kit is for standard gearcases only and will not fit "Bigfoot" models. If unsure, check your current part numbers against our cross-reference list.

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

A: Common signs include the engine overheating, a weak or non-existent water stream from the "tell-tale" outlet port, and a melted or brittle appearance of the old impeller's rubber vanes upon inspection.

Q: How often should the water pump impeller be replaced?

A: For preventative maintenance, it is recommended to inspect and/or replace the impeller every 1-2 years or every 100-200 hours of use, depending on operating conditions (especially in saltwater or sandy/silty water).

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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 21188097922

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Reviewed in the United States on March 31, 2023
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