SIERRA 18-3416 Water Pump Base Mercury/mariner 46-96146A6

( Brand: Sierra ), ( Manufacturer Part Number: 18-3416 ), ( Part Type: Pump ), ( Warranty: 90 Day ), ( Country Of Manufacture: Usa ), ( Factory Oem: No ), ( Fitment Type: Direct Replacement )

Review SIERRA Water Pump Base Replaces Mercury/mariner Qty Part Id fits MARINER

The **Sierra 18-3416 Water Pump Base** is a precision-engineered, high-performance component designed exclusively for Mercury and Mariner outboard motors, specifically tailored to models requiring the **46-96146A6** water pump assembly. This robust base serves as the foundational support for the water pump, ensuring optimal alignment, durability, and efficiency in marine propulsion systems. Crafted from high-grade, corrosion-resistant materials, the base is built to withstand the harsh conditions of saltwater environments, preventing degradation and maintaining structural integrity over extended periods of use. Its precise engineering accommodates the exact dimensions and mounting requirements of the Mercury/Mariner engine series, allowing for seamless integration with the water pump assembly, impeller, and associated drive components. The design incorporates strategic gasket surfaces and alignment guides to minimize leakage and vibration, thereby enhancing the overall performance and longevity of the propulsion system. Whether installed in a recreational boat, fishing vessel, or performance cruiser, this water pump base ensures reliable fluid circulation, cooling, and lubrication for the engine, contributing to smoother operation and reduced maintenance demands. Its compatibility with the **46-96146A6** water pump assembly makes it an essential replacement part for those seeking to restore or upgrade their outboard motor s hydraulic system, offering both functionality and peace of mind for marine enthusiasts and professionals alike.

### **Pros and Cons of buying a Sierra 18-3416 Water Pump Base (Mercury/Mariner 46-96146A6)**

1. **Direct Compatibility** This water pump base is specifically designed for Mercury/Mariner outboards, particularly the 46-96146A6 model, ensuring a proper fit without modifications.

2. **Durability** Sierra is a well-known brand in marine parts, known for producing high-quality, long-lasting components that can withstand harsh marine environments.

3. **Ease of Installation** The base is engineered to align correctly with the engine s mounting points, reducing the risk of misalignment during installation.

4. **Performance Reliability** A properly installed water pump base ensures efficient cooling and lubrication, preventing overheating and engine damage.

5. **Warranty Coverage** Sierra parts often come with manufacturer warranties, providing some assurance against defects in materials or workmanship.

6. **Cost-Effective Replacement** If the original water pump base is worn or damaged, replacing it with this OEM-compatible part can be more economical than buying a full engine kit.

7. **Compatibility with Aftermarket Parts** Since it fits standard Mercury/Mariner mounts, it can also work with aftermarket water pumps if needed.

1. **Limited Use Case** This part is **only** for the specified Mercury/Mariner 46-96146A6 engine model. Buying it for a different engine may result in incompatibility.

2. **Potential Misalignment Risks** If installed incorrectly, it could lead to vibration, coolant leaks, or even engine damage over time.

3. **No Bundled Components** Unlike some kits, this is just the base you ll need to source the water pump, seals, gaskets, and fasteners separately, adding to the cost.

4. **Availability Concerns** Depending on the region, this part may not be readily available at all marine supply stores, requiring online ordering.

5. **Installation Expertise Required** If you re not experienced with marine engine work, professional installation is recommended to avoid mistakes.

6. **Price Sensitivity** While not excessively expensive, it may still be a significant investment if you re on a tight budget, especially when factoring in additional required parts.

---

### **Conclusion**

The **Sierra 18-3416 Water Pump Base (Mercury/Mariner 46-96146A6)** is a **high-quality, direct-fit replacement** for its intended engine model. It offers **reliability, durability, and ease of installation** when used correctly, making it a strong choice for boat owners who need a **genuine OEM solution**. However, its **narrow compatibility** and the need for additional components mean it may not be the best option for everyone.

If you re certain about the engine model and have the necessary tools or access to professional help, this part is a **solid investment** that will help maintain engine performance. If you re unsure about compatibility or lack experience with marine repairs, **consulting a marine mechanic first** is advisable.

- **Buy it if:** You have a confirmed Mercury/Mariner 46-96146A6 engine, need a reliable replacement, and are prepared to source complementary parts (water pump, seals, etc.).

- **Avoid it if:** You re unsure about the exact engine model, lack mechanical experience, or prefer a more universal solution.

- **Alternative Consideration:** If budget is a concern, check for **aftermarket alternatives** (e.g., Seafoam or other marine brands) that may offer similar performance at a lower cost, though always verify compatibility first.

For the best results, **purchase from a reputable marine parts dealer** and ensure proper installation to maximize longevity.

Details:

We ll be adding new listings to this line every day at limited quantities so sure bookmark and keep watch for more great deals. Largest Inventory of Factory Car Audio in the USA!, Sierra Water Pump Base Replaces Mercury/Mariner 46-96146A6 Qty 1 Part ID 18-3416, Sierra, Base, The 18-3416 is a high-quality, durable replacement component designed for outboard engines, ensuring reliable cooling system performance. Brand New Item. Please see photos for details.

This is Sierra Water Pump Base. Features: Engineered for long-lasting durability, specifically designed to withstand the marine environment. 18-3416, Fitment: Fits various Mercury/Mariner V150 s/n A904645 below, V175 4301235 to 6618750, and V200 4839034 6625220, without driveshaft retaining nut outboard model's. Specifications: QTY: 1, Brand: Sierra, MFG Part No.

Serves as a crucial component for water pump assemblies, aiding in engine cooling to prevent issues caused by overheating, such corrosion. Part Number: 18-3416, 90 Day Warranty Included. It is engineered to meet or exceed OEM specifications for fit and durability, providing a reliable, cost-effective alternative engine maintenance.

part #: 183416 prices

• $15.00-$44.97

specifications ouboaen:

• for models: Mariner
• for makes: Mercury
• brand: Sierra
• mpn: 18-3416
• part type: Pump
• warranty: 90 Day
• country of manufacture: Usa
• factory oem: No
• fitment type: Direct Replacement

payments ouboaen:

• wallet: Paypal
• credit card: Visa
• other

offer ouboaen:

• availability: In Stock
• quantity: 1
• started: March 14, 2026
• options: Ship-to-home
• sold: 0

returns ouboaen:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

general ouboaen:

• Boat Parts > Outboard Engines Components > Other
• condition: New

shipping ouboaen:

• cost: $0.00
• service: USPS First Class
• transit: 4-9 Days
• class: Standard
• type: Fixed
• carrier: USPS

seller ouboaen:

• rating: 100.0%
• city: Richmond, Virginia
• # reviews: 34230

Sierra 18-3416 Is Similar To:

• 030999320889 Sierra Carburetor Kit Force Replaces (34.1% similar) Comes in a sealed package good luck and happy buying. This is a new in the box, Sierra carburetor kit part 18-7037REPLACES force FK10004 FK10005 FK10007 FK10008 FK10027 FK10057 FK10108 FRK739MADE us...(September 25th, 2018)
• 09-812b 119773-42600 18-3306 S685007 F6b-9 Carbole Water Pump Impeller Kit Repair Replaces For Johnson Sierra (34.9% similar) Part: 119773-42600 prices...(April 6th, 2018)
• 1399-1138 Sierra Chrysler Force Mercury Mariner Needle Seat (40.3% similar) What you see is get. New, ready to install...(August 31st, 2018)
• 18-0315 Sierra Carb Gasket Replaces Chrysler (43.5% similar) Pen the package and inspect item for damage. Not all years use the same part number. If the item is damaged immediately for further instruction on filing a claim. Some new parts do not have their original box, or the box could be falling apart from age. Customer needs to pay return shipping and ...(October 26th, 2018)
• 18-0946 27-85653-1 Sierra Mercury Transfer 030999755506 (30.7% similar) Mercury Sierra transfer port gasket 6 cylinder Cl...(February 15th, 2018)
• 18-1564 Sierra Quicksilver 43-803615t2 Mercury (28.6% similar) For other cool parts and close out specials check FATBOYSH2O. This is a new part in the factory package. This is a direct replacement for mercury quicksilver part number 43-803615T2. Up for sale is a Sierra marine forward gear set part number mercury v6 outboard...(July 4th, 2017)
• 18-1731 Sierra Nos Detent Replaces Omc For Cobra Drives 808282167288 (33.8% similar) I have no reason to believe its not new, but it does some dark spots on due tarnishing. I bought this in a huge lot of new parts. The part is top notch and ready to go...(October 6th, 2018)
• 18-2185 Sierra Water Pump Drive 030999311863 (40.3% similar) Please verify your junk bulk mail folder as our e-mail reply may end up in there. Satisfaction guaranteed before opening a request...(August 4th, 2017)
• 18-2323 Sierra Engine Coupler Mercury 808282100889 (33.8% similar) 3l serial: F000878 up 1993 to 7LX efi alpha F752400 K999999 1996 3LH gen L010044-M614999 1998 moi M300000 2002 satisfaction guaranteed before opening a request. Alpha serial: F000001-F600999 1994 to 3LXH gen F803000-K999999 1996 1997 . You can also leave us a message. Shipping charges ...(September 14th, 2017)
• 18-2374 Sierra Marine Yamaha Outboard Magnetic Drain Screw Replaces (25.9% similar) Sierra marine Yamaha outboard magnetic drain screw replaces 00USES gasket not included m8 thread...(January 22nd, 2019)
• 18-2626 Sierra Mercury Mariner Lower Unit Seal Kit Outboard 808282243685 (32.9% similar) Mercury mariner outboards:replaces: 26-43035A4. Sierra marine mercury mariner lower unit seal KITOUTBOARD18-2626 mfr: part order UPC: 85 condition: new : mercury mariner outboard lower unit seal kit...(June 27th, 2018)