Water Pump Impeller Kit with Housing – Fits MerCruiser Alpha & Bravo (Replaces 46-807151A14, 807151A7)
Water Pump Impeller Kit with Housing – Fits MerCruiser Alpha & Bravo (Replaces 46-807151A14, 807151A7) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Impeller Kit with Housing – Fits MerCruiser Alpha & ...
Product Details
This Water Pump Impeller Kit with Housing – Fits MerCruiser Alpha & Bravo Engines (Replaces 46-807151A14, 807151A7) is designed for MerCruiser Alpha and Bravo sterndrives and select inboard engines (4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 8.2L) from 1987–2016 equipped with a one-piece plastic sea water pump housing.
It serves as a direct cross-reference for MerCruiser parts 46-807151A14 and 46-807151A7, as well as aftermarket equivalents from Sierra, Quicksilver, GLM, and Mallory.
- Engineered for marine engines with one-piece engine-mounted sea water pumps.
- Features a direct-replacement design for straightforward installation.
- Includes a complete set of components: housing, impeller, wear plate, bolts, and O-rings.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 46-807151A14 |
| MerCruiser | 807151A14 |
| MerCruiser | 46-807151A7 |
| MerCruiser | 807151A7 |
| Sierra | 18-3150 |
| Quicksilver | 807151A14 |
| GLM | 12088 |
| Mallory | 9-48350 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for MerCruiser applications utilizing a one-piece sea water pump housing.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | Alpha Sterndrives | Various | 4-Stroke | 1987–2016 | 46-807151A14 | One piece housing sea water pump |
| MerCruiser | Bravo Sterndrives | Various | 4-Stroke | 1987–2016 | 46-807151A14 | One piece housing sea water pump |
| MerCruiser | TRS Sterndrives | Various | 4-Stroke | 1987–2016 | 46-807151A14 | One piece housing sea water pump |
| MerCruiser | 350 MAG BRAVO | 300 | 4-Stroke | 1987–2016 | 46-807151A14 | |
| MerCruiser | 357 MAG BRAVO | 325 | 4-Stroke | 1987–2016 | 46-807151A14 | |
| MerCruiser | 373 MAG BRAVO | 310 | 4-Stroke | 1987–2016 | 46-807151A14 | |
| MerCruiser | 4.3L V6 Inboard | 190-220 | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | 5.0L V8 Inboard | 220-260 | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | 5.7L V8 Inboard | 250-300 | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | 6.2L V8 Inboard | 300-320 | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | 7.4L V8 Inboard | 310-340 | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | 8.2L V8 Inboard | 380-430 | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | 454 MAG | 330-385 | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | Re-manufactured 5.8L/6.3L | Various | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | Re-manufactured 6.3L/8.6L | Various | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
| MerCruiser | Crate Engines 8.6L | Various | 4-Stroke | 1987–2016 | 46-807151A14 | With one-piece plastic housing |
Technical Specs
- Product Type
- Water Pump Impeller Kit with Housing
- Installation
- Direct replacement, 1-piece plastic housing
- Housing Material
- Phenolic resin compound (two-step)
- Housing Color
- Black
- Weight
- 680g (1.5 lb)
- Warranty
- 1 Year (varies by manufacturer)
- Other Technical Attributes
- For marine engines with one-piece engine mounted sea water pumps
What’s in the Box
- 1 x Water Pump Housing (46-807151A14)
- 1 x Water Pump Impeller
- 1 x Wear Plate
- 1 x Installation Bolts with Washers
- 1 x O-Rings
Installation Notes
- Disconnect the boat's battery for safety.
- Locate the engine-mounted sea water pump assembly and drain any water by loosening the hoses.
- Remove the bolts securing the pump housing and detach it. Note the orientation of the old impeller vanes.
- Remove the old impeller, wear plate, and any o-rings or gaskets.
- Thoroughly clean the interior surfaces of the pump body.
- Install the new wear plate and o-rings. Apply a thin layer of marine grease to the o-rings.
- Lubricate the new impeller and the inside of the new housing with a suitable glycerine-based lubricant.
- Insert the new impeller into the housing, twisting in the direction of engine rotation to bend the vanes correctly.
- Secure the new housing with the provided bolts, tightening them to the manufacturer's specified torque.
- Reconnect all hoses securely, then reconnect the battery.
- Start the engine and immediately check for proper water flow from the tell-tale outlet and for any leaks around the pump housing.
Troubleshooting & FAQ
How do I know if this kit fits my MerCruiser engine?
This kit fits MerCruiser Alpha, Bravo, and TRS sterndrives, as well as various V6 and V8 inboard engines from 1987–2016 that use a one-piece plastic sea water pump housing. Always confirm your specific engine model and year in the compatibility table provided above before ordering.
What are the signs of a failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent stream of water from the tell-tale (water indicator) outlet, and a dry-running sound from the pump area. During inspection, visible cracks, tears, or stiff/brittle vanes on the old impeller confirm it needs replacement.
How often should I replace my water pump impeller?
As a best practice for preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of operation. Frequency may depend on operating conditions, such as running in saltwater or debris-heavy water, which can accelerate wear.
Is this a complete kit for the job?
Yes, this is a complete kit that includes the water pump housing, a new impeller, wear plate, necessary O-rings, and installation bolts with washers. It provides all the core components needed for a standard replacement of the sea water pump assembly.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most regions; expedited options will appear at checkout where available.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. Please see our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before installation. If anything differs—even if your model appears compatible—do not purchase or install.
- This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.
- Professional installation is highly recommended for safety, proper function, and to prevent engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions with a typical transit time of just 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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