Water Pump Repair Kit – Fits Mercury/Mariner 2 HP (Replaces 46-6885M, 46-80395M)
Water Pump Repair Kit – Fits Mercury/Mariner 2 HP (Replaces 46-6885M, 46-80395M) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Water Pump Repair Kit – Fits Mercury/Mariner 2 HP (Replaces 46-6885...
Water Pump Repair Kit – Fits Mercury/Mariner 2 HP (Replaces 46-6885M, 46-80395M) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit is designed for Mercury/Mariner 2 HP 2-Stroke outboard engines manufactured between 1984 and 2002. It contains all the necessary seals, gaskets, and impeller components to restore your engine's cooling system for reliable performance.
It serves as a direct replacement for Mercury part numbers 46-6885M and 46-80395M, along with Sierra equivalents 18-3462 and 18-3463, and Yamaha 6A1-W0078-01-00.
- Engineered for a direct OEM-equivalent fit.
- Designed specifically for models with the small gear housing.
- Includes the essential impeller, wear plate, insert cup, and seals for a complete service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 46-6885M |
| Mercury | 46-80395M |
| Mercury | 80395M |
| Mercury | 6885M |
| Sierra | 18-3462 |
| Sierra | 18-3463 |
| Yamaha | 6A1-W0078-01-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner owners, this kit fits 2 HP models designated 2A and 2B from 1984–2002.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercury/Mariner | 2A, 2B | 2 | 2-Stroke | 1984–2002 | 46-6885M, 46-80395M |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- OEM Direct Replacement
- Fitting Type
- Direct Fit
- Other Technical Attributes
- For small gear housing/lower unit
What’s in the Box
- 1 x Water Pump Impeller (80395M)
- 1 x Cup, Insert (80393M)
- 1 x Wear Plate (80394M)
- 1 x Protector, Oil Seal (92529M)
- 1 x O-Ring (82269M)
- 1 x Seal, Water (80398M)
- 2 x Seal, Oil (82251M)
- 2 x Pin, Dowel (82356M)
- 2 x Bolt and Washer (92521M)
Installation Notes
- Disconnect the battery and engine kill switch for safety.
- Place the outboard in neutral and remove the lower unit (gearcase) bolts.
- Carefully separate the lower unit from the upper housing, minding the driveshaft and shift linkage.
- Unbolt and remove the old water pump housing. Note the orientation of the old components.
- Remove the old impeller, plate, cup, and seals. Clean all mating surfaces thoroughly.
- Install the new components from the kit in the reverse order of removal. Lubricate the new impeller and insert cup with marine grease for easier installation.
- Rotate the driveshaft clockwise while sliding the new impeller down to seat the vanes correctly.
- Reinstall the water pump assembly, torquing bolts to manufacturer specifications.
- Reattach the lower unit, ensuring the driveshaft and water tube align correctly.
- Once assembled, reconnect the battery and test the engine in water, confirming a steady stream of water from the tell-tale port.
Troubleshooting & FAQ
How can I confirm this kit fits my Mercury 2HP engine?
This kit is specifically for Mercury/Mariner 2 HP 2-Stroke outboards (models 2A, 2B) from 1984 to 2002 using a small gear housing. Please check your engine's model and year against the compatibility table and verify your existing part numbers match the ones listed in the Part Number Matrix.
What are the signs of a failing water pump?
Common symptoms include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, or a noticeable decrease in engine performance. Inspecting the impeller during routine maintenance is the best preventative measure.
How often should the water pump impeller be replaced?
As a general rule, it's recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, whichever comes first. Usage in saltwater or sandy/murky water may require more frequent replacement.
Does this kit include a new water pump housing?
No, this is a repair kit that includes the internal wear items: impeller, wear plate, insert cup, and all necessary seals and gaskets. The outer housing is not included. You should reuse your existing housing if it is not cracked or excessively worn.
What is the difference between OEM and aftermarket parts?
This listing is for an aftermarket replacement component, not an original equipment manufacturer (OEM) part. It has been engineered to meet or exceed OEM-level specifications using comparable materials. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency.
What are your shipping speeds and costs?
We ship worldwide quickly, with a typical transit time of 5–15 days for most regions. Standard shipping is free. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal operating conditions. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard return window for unused items in their original condition. See our official policy page or reach out for detailed instructions.
Safety & Important Info
- Verify images and specifications against 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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