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Description
Water Pump Repair Kit – Fits Mercury/Mariner Outboards 75-225HP & MerCruiser Alpha One Stern Drives (Replaces 96148Q8, 46-96148A8)Water Pump Repair Kit Fits Mercury Mariner Outboards 75 225HP & MerCruiser Alpha One Stern Drives This water pump repair kit provides the essential components needed to restore the cooling system on a wide range of Mercury Mariner outboards and MerCruiser stern drives. It is designed for 75 225HP 2 Stroke outboards (4 cylinder and V6 models) and MerCruiser Pre Alpha, R, MR, and Alpha One stern drives (1970 1990) within the serial number range 2495186
Water Pump Repair Kit – Fits Mercury/Mariner Outboards 75-225HP & MerCruiser Alpha One Stern Drives
This water pump repair kit provides the essential components needed to restore the cooling system on a wide range of Mercury/Mariner outboards and MerCruiser stern drives. It is designed for 75-225HP 2-Stroke outboards (4-cylinder and V6 models) and MerCruiser Pre-Alpha, R, MR, and Alpha One stern drives (1970-1990) within the serial number range 2495186 to 0D469858.
Engineered as a direct replacement for multiple OEM part numbers, this kit ensures a precise fit and restores cooling performance. It is cross-compatible with Mercury parts 46-96148A8, 96148Q8, 96148T8, 96148B8, 96148A5, and Sierra parts 18-3217, 18-3316, 18-3517.
- Complete Kit: Includes a neoprene rubber impeller, housing, gaskets, seals, and other necessary hardware for a full replacement.
- Durable Materials: Features a marine-grade key plate, nylon PA66 plastic housing, and neoprene seals for longevity in marine environments.
- Direct Installation: Designed to fit the original water pump housing without modifications; follow your factory service manual for installation.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 46-96148A8 / 96148Q8 / 96148T8 / 96148B8 / 96148A5 |
| Quicksilver | 96148Q8 |
| Sierra | 18-3217 / 18-3316 / 18-3517 |
| Marinepro | 96148Q8 |
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 Outboards
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | 4-Cylinder | 65 | 2-Stroke | Serial #1542745-3293183 | 46-96148A8 | |
| Mercury/Mariner | 4-Cylinder | 70 | 2-Stroke | Serial #1503959-1566239 | 46-96148A8 | |
| Mercury/Mariner | 4-Cylinder | 75 | 2-Stroke | Serial #6432901 & Up | 46-96148A8 | |
| Mercury/Mariner | 4-Cylinder | 80 | 2-Stroke | Serial #2559001-6432900 | 46-96148A8 | |
| Mercury/Mariner | 4-Cylinder | 85 | 2-Stroke | Serial #1566240-4861998 | 46-96148A8 | |
| Mercury/Mariner | 4-Cylinder | 90 | 2-Stroke | Serial #1766824 & Up | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 100SS | 2-Stroke | Serial #1503332-2836018 | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 110 | 2-Stroke | Serial #1870204-2314955 | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 115 | 2-Stroke | Serial #2836019 & Up | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 125 | 2-Stroke | Serial #2314956-2839368 | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 135 | 2-Stroke | Serial #2839369-3293233 | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 140 | 2-Stroke | Serial #3293234 & Up | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 150 | 2-Stroke | Serial #3502806 & Up | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 175 | 2-Stroke | Serial #4301235 & Up | 46-96148A8 | |
| Mercury/Mariner | 6-Cylinder | 200 | 2-Stroke | Serial #4839034 & Up | 46-96148A8 | Not including V-200 DFI 3.0L |
| Mercury/Mariner | 6-Cylinder | 220 | 2-Stroke | Serial #OB117316 & Up | 46-96148A8 | |
| Mercury/Mariner | V6 | V150, V175, V200, V225 | 2-Stroke | All | 46-96148A8 | |
| Mercury/Mariner | XR4/Magnum II | All | 2-Stroke | All | 46-96148A8 |
MerCruiser Stern Drives
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | Pre-Alpha | 1970-1983 | 46-96148A8 | |
| MerCruiser | R | Up to 1983 | 46-96148A8 | |
| MerCruiser | MR | 1984-1985 | 46-96148A8 | |
| MerCruiser | Alpha One | 1983-1990 | 46-96148A8 | Serial #2495186-0D469858 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Repair Kit |
| Installation | Direct replacement; follow factory service manual |
| Connection | Direct installation to water pump housing |
| Housing Material | Marine grade key plate and cup, nylon PA66 plastic housing |
| Housing Color | Black/Natural |
| Dimensions | Package: 152mm × 101mm × 80mm (5.98" × 3.98" × 3.15") |
| Weight | 0.30kg (10.72 oz) |
| Fitting Type | Direct fit |
| Other Technical Attributes | Neoprene rubber water pump impeller, CR neoprene rubber impeller seals |
Package Contents
- 1 x Water Pump Impeller (Replaces 46-96148A8)
- 1 x Impeller Housing
- 1 x Impeller Key
- 1 x Face Plate
- 2 x Gaskets
- 1 x Seal
- 1 x Water Tube Guide Sleeve
- 1 x O-ring
- 2 x Drain Plug Washers
Installation Guide
- Disconnect Power: Disconnect the battery before starting work.
- Drain Gear Lube: Drain the gear lube from the lower unit.
- Remove Lower Unit: Unbolt and carefully detach the lower unit (gearcase) from the outboard leg.
- Access Pump: Locate and unbolt the water pump housing.
- Remove Old Components: Remove the old housing, impeller, wear plate, gaskets, and seals. Note their orientation.
- Clean Surfaces: Thoroughly clean all mating surfaces, ensuring they are free of old gasket material and corrosion.
- Install New Components: Install the new gaskets, wear plate, and impeller key.
- Install Impeller: Slide the new impeller onto the driveshaft. Rotate the shaft clockwise while pushing down to seat the vanes correctly inside the housing.
- Secure Housing: Install the new housing and torque the bolts to the manufacturer's specified values.
- Reinstall Lower Unit: Reattach the lower unit to the engine leg and tighten all bolts securely.
- Refill and Test: Refill the lower unit with fresh gear lube. Reconnect the battery and test the engine's cooling system operation in water, checking for a strong tell-tale stream.
Troubleshooting & FAQ
Q: How do I confirm this kit fits my Mercury engine?
A: Check the serial number of your engine. This kit fits specific serial ranges for 75-225HP 2-stroke outboards and MerCruiser Alpha One stern drives from 1970-1990 (serial #2495186-0D469858). Always refer to the detailed compatibility tables on this page to verify your specific model and serial number before ordering.
Q: What are the signs my water pump is failing?
A: Common signs of a failing water pump include the engine overheating (especially at idle or low speeds), a weak or non-existent water stream from the "telltale" outlet, or finding a brittle, cracked, or deformed impeller during a routine inspection.
Q: How often should I replace the water pump impeller?
A: For preventative maintenance, it is highly recommended to replace the water pump impeller every 1 to 2 years, or every 100-200 hours of operation. The interval may vary based on usage (e.g., saltwater vs. freshwater) and operating conditions.
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:
- 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