Sea Water Pump Kit – Fits MerCruiser Bravo & TRS Sterndrives, Inboard Engines (Replaces 46-807151A14, 46-807151A7)
Sea Water Pump Kit – Fits MerCruiser Bravo & TRS Sterndrives, Inboard Engines (Replaces 46-807151A14, 46-807151A7) 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
Sea Water Pump Kit – Fits MerCruiser Bravo & TRS Sterndrives, I...
Product Details
This Sea Water Pump Kit – Fits MerCruiser Bravo & TRS Sterndrives and Inboard Engines (Replaces 46-807151A14) is a complete assembly for all MerCruiser Bravo, TRS Sterndrives, and Inboard Marine engines that use a one-piece housing. The kit includes the full water pump assembly with housing, a new impeller, and all necessary mounting hardware for a complete service.
This component directly replaces Mercury part numbers 46-807151A14 and 46-807151A7, along with equivalents from Quicksilver, Sierra, GLM, Mallory Marine, Pro Marine, and Redline.
- Designed for direct replacement of the original one-piece pump housing.
- Can also be used to upgrade older two-piece housing designs.
- Includes a complete assembly for a straightforward installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 46-807151A14 / 46-807151A7 |
| Quicksilver | 807151A14 / 807151A7 |
| Sierra | 18-3150 |
| GLM | 12088 |
| Mallory Marine | 9-48350 / 948350 |
| Pro Marine | 64151 |
| Redline | RL3150 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits a wide range of Mercury MerCruiser engines. Please check your model against the list to ensure fitment.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| MerCruiser | Alpha with FWC (closed cooling) and internal pump | Various | 4-Stroke | 46-807151A14 | For engines with internal pump only |
| MerCruiser | Bravo | Various | 4-Stroke | 46-807151A14 | |
| MerCruiser | Ski | Various | 4-Stroke | 46-807151A14 | |
| MerCruiser | 330 (B-W) TR/TRS Engines | 330 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 350 Magnum MPI Alpha/Bravo | 350 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 357 MAG Bravo 4V/357 Alpha 4V/383 | 357/383 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 454/502 MPI MAG Bravo | 454/502 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 575 SCI, 662 SCi, 600 SCi, 700 SCi | 575-700 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 5.0L/5.7L Alpha/Bravo GEN+ | Various | 4-Stroke | 46-807151A14 | |
| MerCruiser | 200/5.0L/LX 260/5.7L 350 MAG Alpha/Bravo | 200-350 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 350/6.2L Black Scorpion SKI | 350/6.2L | 4-Stroke | 46-807151A14 | |
| MerCruiser | 500 CARB (502CID) 8.2L engine | 500/8.2L | 4-Stroke | 46-807151A14 | |
| MerCruiser | 7.4L/8.2L MPI (MIE) Gen VI | 7.4L/8.2L | 4-Stroke | 46-807151A14 | |
| MerCruiser | 5.7L Tow Sport | 5.7L | 4-Stroke | 46-807151A14 | |
| MerCruiser | Scorpion 377 | 377 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 4.3L CARB Alpha/Bravo | 4.3L | 4-Stroke | 46-807151A14 | |
| MerCruiser | 500, 525, 565 EFI | 500-565 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 540 Stroker 4V | 540 | 4-Stroke | 46-807151A14 | |
| MerCruiser | 7.4L EFI (MIE) Hurth/Borg Warner (GEN VI) | 7.4L | 4-Stroke | 46-807151A14 | |
| MerCruiser | 5.7L Competition SKI engine (GEN +) | 5.7L | 4-Stroke | 46-807151A14 |
Technical Specs
- Product Type
- Sea Water Pump Kit with Housing
- Installation
- Direct replacement, one-piece housing design
- Housing Material
- Phenolic resin compound (two-step)
- Housing Color
- Black
- Dimensions
- 140 × 140 × 100 mm (5.5 × 5.5 × 3.9 in)
- Weight
- 0.86–0.88 kg (1.9–1.94 lb)
- Warranty
- Limited Lifetime (Sierra)
- Other Technical Attributes
- Can replace two-piece housing sea water pump
What’s in the Box
- 1 x WATER PUMP ASSEMBLY (46-807151A1)
- 1 x O-RING (25-33465/25-8M0214925)
- 5 x SCREWS HEX HEAD .312-18 X 3.250 (10-74191/8M0204669)
- 2 x SCREWS HEX HEAD .312-18 X 2.68 (10-807356)
- 5 x WASHERS (.344 X .688 X .065) STAINLESS STEEL (12-814806)
- 1 x IMPELLER (47-59362T1)
- 1 x QUAD RING (25-94288/25-8M0215007)
- 1 x WEAR PLATE OUTER (94576/8M0204674)
Installation Notes
- Disconnect the boat's battery and close the engine's raw water intake seacock before beginning work.
- Place a catch pan under the pump and carefully loosen the hose clamps to remove the intake and output hoses. Expect some water to spill.
- Remove the mounting bolts holding the old pump assembly to the engine. Note their lengths and positions if they differ.
- Gently pry the old pump off. Clean the mounting surface on the engine block thoroughly, ensuring it's free of old gasket material or sealant.
- Compare the new pump assembly to the old one to confirm an exact match.
- Place the new O-ring or gasket onto the pump housing.
- Position the new pump assembly and start the mounting bolts by hand to avoid cross-threading.
- Tighten the bolts evenly in a star or criss-cross pattern to the manufacturer's recommended torque specification. Do not overtighten.
- Reconnect the water hoses and secure the clamps tightly.
- Open the raw water seacock and reconnect the battery.
- Start the engine and immediately check the pump and hose connections for any water leaks. Let the engine run for several minutes to confirm proper operation.
Troubleshooting & FAQ
How do I know if this pump fits my MerCruiser engine?
This pump fits all MerCruiser Bravo and TRS sterndrives, plus a wide range of inboard models. The most reliable method for confirming fitment is to check your engine's original part number. If it matches 46-807151A14 or any of the cross-references in our Part Number Matrix, this kit is the correct replacement.
Can this one-piece housing replace my original two-piece housing?
Yes, this complete one-piece housing and pump assembly is designed as a direct upgrade and replacement for engines that originally came with the older two-piece sea water pump design.
What are the signs of a failing water pump?
Common symptoms of a bad or failing sea water pump include the engine running hotter than normal or overheating, especially at idle or low speeds. You may also notice a reduced or absent stream of water from the exhaust "tell-tale," visible water leaks around the pump body, or hear a grinding/whining noise from the pump area.
How often should the impeller be replaced?
For preventative maintenance, marine mechanics recommend inspecting the impeller annually and replacing it every 1-2 years or 100-200 hours of engine use. Service intervals should be shorter in environments with sandy, silty, or debris-heavy water.
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.
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