Water Pump Service Kit – Fits Mercury/Mariner 75-220 HP & MerCruiser I/R/MR/Alpha (Replaces 96148A8)
Water Pump Service Kit – Fits Mercury/Mariner 75-220 HP & MerCruiser I/R/MR/Alpha (Replaces 96148A8) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Service Kit – Fits Mercury/Mariner 75-220 HP & MerCr...
Product Details
This complete Water Pump Service Kit provides all necessary components to repair the upper water pump housing on a wide range of Mercury/Mariner outboards (65-220 HP, 2-Stroke) and MerCruiser I, R, MR, and Alpha sterndrives (serial numbers 2491586-0D469858). It is designed specifically for outboard models equipped with short-vane impellers.
It serves as a direct aftermarket replacement for Mercury 46-96148A8, Sierra 18-3320, and Quicksilver 96148A8, ensuring a precise fit and reliable cooling performance.
- Engineered as a direct OEM-equivalent replacement for straightforward installation.
- Features a durable, corrosion-resistant plastic pump housing assembly.
- Includes a new impeller, gaskets, seals, and all required hardware for a comprehensive overhaul.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 46-96148A8 |
| Quicksilver | 96148A8 |
| Sierra | 18-3320 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner Outboards: This kit fits a range of 2-stroke outboards from 65 to 220 HP, specifically models using short-vane impellers.
For MerCruiser Sterndrives: Compatible with I, R, MR, and Alpha sterndrive models falling within the serial number range of 2491586 to 0D469858.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury/Mariner | 4-cylinder | 65-75 | 2-Stroke | 96148A8 | |
| Mercury/Mariner | V6 | 75-220 | 2-Stroke | 96148A8 | Models with short-vane impellers |
| MerCruiser | I Drive | 96148A8 | Serial No. 2491586-0D469858 | ||
| MerCruiser | R Drive | 96148A8 | Serial No. 2491586-0D469858 | ||
| MerCruiser | MR Drive | 96148A8 | Serial No. 2491586-0D469858 | ||
| MerCruiser | Alpha Drive | 96148A8 | Serial No. 2491586-0D469858 |
Technical Specs
- Product Type
- Water Pump Service Kit
- Installation
- Direct OEM replacement
- Housing Material
- Plastic
- Housing Color
- Black
- Weight
- 0.60 lb (0.27 kg)
- Other Attributes
- Complete water pump repair kit for upper housing assembly
What’s in the Box
- 1 x Plastic Pump Housing Assembly
- 1 x Water Impeller
- 1 x Face Plate
- 1 x Gasket Set
- 1 x Drive Key/Pin
- 1 x Water Tube Guide Sleeve
- 1 x "O" Ring Set
- 1 x Gearlube Fill & Vent Screw Seals
- 1 x Face Seal
- 1 x Seal Carrier
- 1 x Water Tube Coupling
Installation Notes
- Disconnect the battery and shift the engine into neutral.
- Drain the gearcase lubricant completely.
- Remove the lower unit (gearcase) from the outboard or sterndrive.
- Unbolt and remove the old water pump housing assembly from the lower unit.
- Clean the mounting surfaces and inspect the driveshaft.
- Install the new components from the kit in the reverse order of disassembly, starting with the new impeller and housing.
- Ensure all gaskets and seals are correctly seated to prevent leaks.
- Re-install the lower unit, refill the gearcase with fresh lubricant, and reconnect the battery.
- Start the engine at idle and confirm water is discharging from the tell-tale outlet.
Troubleshooting & FAQ
How do I confirm this kit fits my specific engine model?
The most reliable way is to match your engine's serial number and model details against our compatibility table. For MerCruiser drives, the serial number range is critical (2491586-0D469858). For Mercury/Mariner outboards, ensure your model uses a short-vane impeller and falls within the 65-220 HP range.
What are the common signs of a failing water pump?
Symptoms include engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, and sometimes a dry, burnt smell from the exhaust. The impeller is a wear item and should be inspected regularly.
How often should I replace my water pump impeller?
As a general maintenance rule, it is recommended to replace the water pump impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval can be shorter if you frequently operate in sandy or silty water.
What is included in a "complete" service kit?
This kit includes all the necessary components for a full service of the upper pump assembly, including the housing, impeller, face plate, gaskets, seals, o-rings, and drive key. This ensures you do not need to reuse old, worn parts.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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