Water Pump Impeller Kit – Fits Mercury/Mercruiser Alpha One & Outboard Motors (Replaces 46-96148A8, 96148Q8)
SKU: 1693481889

Water Pump Impeller Kit – Fits Mercury/Mercruiser Alpha One & Outboard Motors (Replaces 46-96148A8, 96148Q8)

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Description

Water Pump Impeller Kit – Fits Mercury/Mercruiser Alpha One & Outboard Motors (Replaces 46-96148A8, 96148Q8)Water Pump Impeller Kit Fits Mercury Mercruiser Alpha One & Outboard Motors This water pump impeller repair kit is designed for Mercury Mercruiser Alpha One sterndrive units (19831990) and a wide range of Mercury outboard motors from 65 HP to 220 HP that use short vane impellers. It serves as a comprehensive solution for replacing worn or damaged water pump components to prevent engine overheating. This kit is a direct replacement for multiple OEM and

Water Pump Impeller Kit – Fits Mercury/Mercruiser Alpha One & Outboard Motors

This water pump impeller repair kit is designed for Mercury/Mercruiser Alpha One sterndrive units (1983–1990) and a wide range of Mercury outboard motors from 65 HP to 220 HP that use short-vane impellers. It serves as a comprehensive solution for replacing worn or damaged water pump components to prevent engine overheating.

This kit is a direct replacement for multiple OEM and aftermarket part numbers, including Mercury 46-96148A8, 96148Q8, 46-96148T8, 46-96148A5, 46-42579A4, 46-44292A4, 46-48747A3, Sierra 18-3320, GLM 12120, and Mallory 9-48307.

  • Includes a durable neoprene impeller and PA66 nylon housing.
  • Engineered as a direct-fit replacement for straightforward installation.
  • Complete with all necessary gaskets, seals, and o-rings for a full service.

Part Number Cross-Reference

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

Brand Part Number
Mercury 46-96148A8
Mercury 96148Q8
Mercury 46-96148T8
Mercury 96148A5
Mercury 46-42579A4
Mercury 46-44292A4
Mercury 46-48747A3
Sierra 18-3320
GLM 12120
Mallory 9-48307

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. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.

Mercury Outboard Motors

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercury Outboard 65 2-Stroke Serial # 1542745-3293183 46-96148A8 4 Cylinder
Mercury Outboard 70 2-Stroke Serial # 1503959-1566239 46-96148A8 4 Cylinder
Mercury Outboard 75 2-Stroke Serial # 6432901 & Up 46-96148A8 4 Cylinder
Mercury Outboard 80 2-Stroke Serial # 2559001-6432900 46-96148A8 4 Cylinder
Mercury Outboard 85 2-Stroke Serial # 1566240-4861998 46-96148A8 4 Cylinder
Mercury Outboard 90 2-Stroke Serial # 1766824 & Up 46-96148A8 4 Cylinder
Mercury Outboard 100SS 2-Stroke Serial # 1503332-2836018 46-96148A8 SS model
Mercury Outboard 110 2-Stroke Serial # 1870204-2314955 46-96148A8 6 Cylinder
Mercury Outboard 115 2-Stroke Serial # 2836019 & Up 46-96148A8 6 Cylinder
Mercury Outboard 125 2-Stroke Serial # 2314956-2839368 46-96148A8 6 Cylinder
Mercury Outboard 135 2-Stroke Serial # 2839369-3293233 46-96148A8 6 Cylinder
Mercury Outboard 140 2-Stroke Serial # 3293234 & Up 46-96148A8 6 Cylinder
Mercury Outboard 150 2-Stroke Serial # 3502806 & Up 46-96148A8 6 Cylinder
Mercury Outboard 175 2-Stroke Serial # 4301235 & Up 46-96148A8 6 Cylinder
Mercury Outboard 200 2-Stroke Serial # 4839034 & Up 46-96148A8 Not including V-200 DFI 3.0L
Mercury Outboard 220 2-Stroke Serial # OB117316 & Up 46-96148A8 6 Cylinder
Mercury Optimax 135-175 2-Stroke 46-96148A8 DFI Engine
Mercury V6 models 135-225 2-Stroke 46-96148A8 2.4L & 2.5L

Mercury MerCruiser Stern Drives

Brand Model Years OEM Part No. Notes
MerCruiser Pre-Alpha 1970-1983 46-96148A8
MerCruiser Alpha One 1983-1990 46-96148A8 Serial # 6225577 and up
MerCruiser I 46-96148A8 Serial # 2491586-0D469858
MerCruiser R 46-96148A8 Serial # 2491586-0D469858
MerCruiser MR 46-96148A8 Serial # 2491586-0D469858

Johnson/Evinrude Applications

Brand Model Rated HP Stroke Years Notes
Johnson/Evinrude 3-Cylinder 60 4-Stroke 1998-Up Alternate fitment
Johnson/Evinrude 3-Cylinder 65 2-Stroke 1979-2001 Alternate fitment
Johnson/Evinrude 3-Cylinder 70 4-Stroke 1998-Up Alternate fitment
Johnson/Evinrude 3-Cylinder 75 2-Stroke 1979-88 Alternate fitment

Technical Specifications

Specification Value
Product Type Water Pump Impeller Kit
Installation Direct Replacement for Mercury/Mercruiser systems
Housing Material Nylon PA66 Plastic (Water Pump Housing)
Impeller Material Neoprene Rubber
Base Size 2.356 inches (59.8 mm)
Weight 330 grams (0.73 lbs)
Compatible With Mercury Marine outboard motors and Mercruiser Alpha One stern drives
Mercruiser Serial Range 2491586 through 0D469858

Package Contents

  • 1 x Water Pump Impeller
  • 1 x Pump Housing (Upper)
  • 1 x Face Plate
  • 1 x Drive Key (or Pin)
  • 1 x Face Seal
  • 1 x Seal Carrier
  • 1 x Water Tube Coupling
  • 1 x Set of Gaskets
  • 1 x Set of O-Rings
  • 2 x Gearlube Fill & Vent Screw Seals

Note: Pump base assembly is not included in this kit.

Installation Guide

  1. Safety First: Disconnect the boat's battery before beginning any work.
  2. Drain Lubricant: Place a drain pan under the lower unit and remove the drain/fill screws to empty the gearcase lubricant.
  3. Remove Lower Unit: Unbolt and carefully detach the lower unit (gearcase) from the engine's upper assembly.
  4. Access Pump: Unscrew the bolts securing the water pump housing to the lower unit.
  5. Remove Old Components: Lift off the old housing. Remove the impeller, wear plate, and gaskets. Note their orientation.
  6. Clean Surfaces: Thoroughly clean the mounting surface on the gearcase, removing any old gasket material or debris.
  7. Install New Kit: Place the new gasket and wear plate. Slide the new impeller onto the drive shaft (turn clockwise) and install the drive key.
  8. Reassemble Pump: Fit the new housing over the impeller and bolt it down to the specified torque.
  9. Reattach Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube align correctly. Secure with bolts.
  10. Refill Lubricant: Fill the gearcase with the recommended marine gear lubricant from the bottom hole until it emerges from the top hole. Re-install both screw seals.
  11. Test Operation: Reconnect the battery. Safely start the engine in water and confirm a steady stream of water from the "tell-tale" exhaust port.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my engine?
A: This kit is designed for Mercury/Mercruiser Alpha One sterndrives (1983-1990) and various 65-220 HP outboards. Please check your model against the compatible engine tables and verify your serial number falls within the specified range (2491586 to 0D469858 for many Mercruiser models).

Q: Is the pump base included?
A: No, the base assembly is not included in this kit. This kit contains the upper plastic housing, impeller, face plate, gaskets, and related seals as listed in the 'Package Contents' section.

Q: What are common signs that my impeller needs replacing?
A: Common indicators include engine overheating, a weak or non-existent stream of water from the "tell-tale" outlet, or visible damage like cracked, stiff, or brittle impeller vanes found during inspection.

Q: What is the difference between this kit and the OEM part?
A: This is an aftermarket replacement part built to meet or exceed original equipment specifications using high-quality neoprene rubber for the impeller and PA66 nylon for the housing. It serves as a direct replacement for multiple OEM part numbers, including 46-96148A8 and 96148Q8.

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: 1693481889

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