Water Pump Upper Repair Kit – For Select Mercury/Mariner 4-Stroke 65–150 HP Models – Replaces 46-8M0061040
Water Pump Upper Repair Kit – For Select Mercury/Mariner 4-Stroke 65–150 HP Models – Replaces 46-8M0061040 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Water Pump Upper Repair Kit – For Select Mercury/Mariner 4-Stroke 6...
Water Pump Upper Repair Kit – For Select Mercury/Mariner 4-Stroke 65–150 HP Models – Replaces 46-8M0061040 is backordered and will ship as soon as it is back in stock.
Product Details
This water pump upper repair kit is a replacement cooling-system service part for select Mercury and Mariner 4-stroke outboards. Catalog references associate the replacement with Mercury 4-stroke models in the 65–150 HP range, but exact fitment depends on the engine model, gearcase configuration, and serial number.
Use the manufacturer part number 46-8M0061040 when comparing your original water pump repair kit. This is an aftermarket replacement and is not manufactured by Mercury.
- Water pump upper repair kit for selected outboard applications.
- Designed to service the water pump and help restore proper cooling-system circulation.
- Confirm the complete engine identification and original part number before ordering.
Part Number Matrix
The following manufacturer reference is associated with this replacement.
| Brand | Part Number |
|---|---|
| Mercury | 46-8M0061040 |
Engine & Model Compatibility
The catalog relationships below are shown with their available model and serial conditions. They are fitment references, not a substitute for checking the identification label on your engine.
| Brand | Model | Rated HP | Stroke | Serial Condition | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | 65 JET | 65 | 4-Stroke | 2B095049 & Up | 46-8M0061040 | Standard or counter-rotation gearcase catalog entries |
| Mercury | 75 EFI | 75 | 4-Stroke | 2B095049 & Up | 46-8M0061040 | Standard or counter-rotation gearcase catalog entries |
| Mercury | 80 JET | 80 | 4-Stroke | 2B095049 & Up | 46-8M0061040 | Standard or counter-rotation gearcase catalog entries |
| Mercury | 90 EFI | 90 | 4-Stroke | 2B095049 & Up | 46-8M0061040 | Standard or counter-rotation gearcase catalog entries |
| Mercury | 100 EFI | 100 | 4-Stroke | 2B095049 & Up | 46-8M0061040 | Standard or counter-rotation gearcase catalog entries |
| Mercury | 115 EFI | 115 | 4-Stroke | 2B095049 & Up | 46-8M0061040 | Standard or counter-rotation gearcase catalog entries |
Additional catalog material places this reference within a broader 65–150 HP range. Specific 135 HP and 150 HP applications should be confirmed by exact model and serial number rather than assumed from horsepower alone.
Technical Specs
- Product Type
- Water pump upper repair kit
- Application
- Select Mercury and Mariner 4-stroke outboard cooling systems
- Reference Part Number
- 46-8M0061040
- Installation
- Replacement service part; lower-unit removal is typically required
- Brand Status
- Aftermarket replacement, not an OEM Mercury component
What’s in the Box
This listing is for the water pump upper repair kit associated with reference part number 46-8M0061040. The available product records do not specify individual component quantities or a complete itemized package list. Compare the package and product images with your original assembly before installation.
Installation Notes
- Confirm the engine model, serial number, gearcase configuration, and original water pump part number before beginning work.
- Disconnect the battery and follow the engine manufacturer’s service procedures.
- Remove the lower unit or gearcase as required to access the water pump assembly.
- Remove the water pump housing and inspect the driveshaft, key, housing, wear surfaces, and sealing surfaces.
- Remove the old service components and clean all mating surfaces thoroughly.
- Install the replacement components supplied with the kit according to the applicable service manual. Do not reuse damaged seals, gaskets, keys, or wear surfaces.
- Seat the impeller correctly in the housing and ensure the driveshaft key and impeller orientation are properly aligned.
- Reinstall the water pump housing and lower unit using the manufacturer’s specified torque values and sealing procedures.
- Restore the required gearcase lubricant level if it was drained during removal.
- Run the engine with an appropriate water supply and verify a steady tell-tale stream. Stop the engine immediately if overheating or an abnormal water flow is observed.
Troubleshooting & FAQ
How do I confirm this kit fits my engine?
Match your engine brand, exact model, horsepower, stroke, serial number, gearcase configuration, and original water pump part number. The reference is documented for selected Mercury 4-stroke applications, including 65, 75, 80, 90, 100, and 115 HP catalog entries with serial condition 2B095049 and up. Do not rely on horsepower alone.
What are the signs of a failing water pump?
Common signs include overheating, a weak or intermittent tell-tale stream, reduced water circulation, or no water discharge. Stop operation and investigate promptly to prevent engine damage.
How often should an outboard impeller be replaced?
Replacement intervals depend on the engine manufacturer’s maintenance schedule, operating hours, water conditions, and storage conditions. Inspect the pump during scheduled service and replace it when wear, cracking, deformation, or reduced water flow is found.
Is installation difficult?
Accessing the water pump generally requires lower-unit removal and appropriate marine-service tools. Professional installation is recommended unless you have the required experience and the correct service information.
Is this an OEM part?
No. This listing is for an aftermarket replacement associated with Mercury reference part number 46-8M0061040. Mercury is referenced for application and part-number comparison only.
What should I do if my original kit looks different?
Do not install the replacement based only on a similar appearance. Compare the original part number, engine identification, gearcase configuration, and supplied components before proceeding.
Shipping speed and cost
Standard and expedited shipping options, delivery estimates, and applicable costs are displayed at checkout where available.
Warranty and returns
Warranty coverage and return eligibility are governed by the applicable store policies. Contact support with your order details before returning or installing a suspected defective part.
Safety & Important Info
- Verify the complete engine model and serial number before ordering.
- Confirm the original reference part number and gearcase configuration.
- Never operate an outboard without an adequate cooling-water supply.
- Follow the applicable service manual for disassembly, torque values, sealing procedures, and testing.
- This is an aftermarket replacement and is not an OEM Mercury component.
- Professional installation is recommended when lower-unit service experience or tools are unavailable.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for dependable service in real-world conditions.
- Global Fulfillment — Delivery options and estimates are provided at checkout for the destination entered.
- Manufacturer-Direct Value — We aim to provide practical replacement solutions with clear application information.
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