Water Pump Upper Repair Kit – Fits Mercury 65–115 HP EFI 4-Stroke Outboards (Replaces 46-8M0061040)
Water Pump Upper Repair Kit – Fits Mercury 65–115 HP EFI 4-Stroke Outboards (Replaces 46-8M0061040) is backordered and will ship as soon as it is back in stock.
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Water Pump Upper Repair Kit – Fits Mercury 65–115 HP EFI 4-Stroke O...
Water Pump Upper Repair Kit – Fits Mercury 65–115 HP EFI 4-Stroke Outboards (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 an aftermarket replacement for selected Mercury 4-Stroke EFI outboards. Catalog applications identify this repair kit for Mercury 65, 75, 90, 100, and 115 HP EFI models with serial number 2B095049 and later.
The kit is listed as a replacement for Mercury OEM part number 46-8M0061040. The related reference 8M0061040 is also associated with this part in aftermarket numbering records.
- Designed for the upper water-pump repair application.
- Suitable for standard-rotation and counter-rotation gear-housing applications where the original part number matches.
- Verify the complete engine model, stroke, serial number, gear-housing ratio, and original part number before ordering.
Part Number Matrix
Use these references to compare the replacement with the part installed on your engine.
| Brand | Reference Type | Part Number |
|---|---|---|
| Mercury | OEM reference | 46-8M0061040 |
| Mercury | Related OEM reference | 8M0061040 |
Engine & Model Compatibility
The catalog applications below are tied to Mercury 4-Stroke EFI models with serial number 2B095049 and later. Match all conditions before installation.
| Brand | Model | Rated HP | Stroke | Fuel System | Serial Condition | OEM Part No. |
|---|---|---|---|---|---|---|
| Mercury | 65 | 65 | 4-Stroke | EFI | 2B095049 and later | 46-8M0061040 |
| Mercury | 75 | 75 | 4-Stroke | EFI | 2B095049 and later | 46-8M0061040 |
| Mercury | 90 | 90 | 4-Stroke | EFI | 2B095049 and later | 46-8M0061040 |
| Mercury | 100 | 100 | 4-Stroke | EFI | 2B095049 and later | 46-8M0061040 |
| Mercury | 115 | 115 | 4-Stroke | EFI | 2B095049 and later | 46-8M0061040 |
Important: The available catalog records confirm the applications listed above. Do not assume fitment for Mercury 135 HP, 150 HP, F150, F75–115 1.7L, or other models unless your engine's original part number and full serial-number conditions match.
Technical Specifications
- Product Type
- Water pump upper repair kit
- Installation Area
- Upper water-pump and gear-housing assembly
- Supported Stroke
- 4-Stroke
- Supported Fuel System
- EFI applications listed in the compatibility table
- Serial Condition
- 2B095049 and later, where specified by the applicable catalog entry
- Product Dimensions
- Length: 4.50 in (114.3 mm); Width: 4.25 in (108 mm); Height: 6.25 in (158.8 mm)
- Product Weight
- 1.30 lb (0.59 kg)
What's in the Box
This listing is for the water pump upper repair kit associated with the reference part number above. Component configuration can vary by application and kit revision, so compare the supplied components with the original assembly and the product images before installation.
Installation Notes
- Disconnect the battery cables and allow the engine to cool completely before beginning work.
- Remove the gearcase or lower unit according to the service procedure for your specific Mercury outboard.
- Remove the existing upper water-pump components from the driveshaft and note the orientation of each part.
- Clean the mating surfaces and remove old gasket material, corrosion, and debris.
- Install the replacement components in the same orientation as the original assembly. Confirm that the impeller key, plate, gaskets, and housing are correctly positioned when included for your application.
- Use suitable marine lubricant where specified by the engine service procedure, and avoid contaminating gasket sealing surfaces.
- Tighten fasteners to the Mercury service-manual torque specifications for your exact engine and gear-housing configuration.
- Reinstall the lower unit, reconnect the battery, and verify a strong cooling-water tell-tale stream before returning the engine to normal operation.
Troubleshooting & FAQ
How do I verify that this repair kit fits my motor?
Match your engine brand, model, horsepower, 4-Stroke EFI configuration, serial number, gear-housing application, and original part number. The catalog-confirmed applications for this listing are Mercury 65, 75, 90, 100, and 115 HP EFI models with serial number 2B095049 and later. If any condition differs, consult a Mercury parts specialist before ordering.
What are the signs of a worn water-pump impeller?
Typical symptoms include overheating, reduced cooling-water flow from the tell-tale outlet, temperature alarms, or damaged, brittle, cracked, or missing impeller vanes.
How often should the water-pump components be replaced?
Replacement intervals depend on operating hours, storage conditions, and exposure to saltwater, sand, or silt. Inspect the cooling system during scheduled maintenance and replace worn components according to the engine service manual.
Are special tools required?
Normal marine-service tools are generally required. A torque wrench is recommended so fasteners can be tightened to the specifications for the exact engine and gearcase.
Is this an OEM part?
This is an aftermarket replacement for the listed Mercury OEM reference. It is not manufactured or sold by Mercury.
Does the reference part number alone guarantee fitment?
No. The reference number is an important identification aid, but model, stroke, serial number, gear-housing ratio, and rotation configuration must also agree with your engine.
Safety & Important Information
- Confirm the original part number, engine serial number, model, stroke, and gear-housing configuration before purchase.
- Do not rely on horsepower alone to determine compatibility.
- Do not operate the outboard if the cooling-water flow is weak or absent.
- Professional installation is recommended when lower-unit removal or water-pump service is outside your experience.
About Sea Sierra
- Marine replacement parts selected for practical service and maintenance applications.
- Clear part-number and fitment information to help customers compare replacement components.
- Support for worldwide marine-parts fulfillment and application questions.
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