Water Pump Repair Kit for Mercury Mariner Force 30–60 HP 4-Stroke Outboards – Replaces 46-812966A12
Water Pump Repair Kit for Mercury Mariner Force 30–60 HP 4-Stroke Outboards – Replaces 46-812966A12 is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit for Mercury Mariner Force 30–60 HP 4-Stroke O...
Water Pump Repair Kit for Mercury Mariner Force 30–60 HP 4-Stroke Outboards – Replaces 46-812966A12 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Water Pump Repair Kit is designed for selected Mercury, Mariner, and Force 30–60 HP 4-stroke outboard applications. The primary reference for this service-kit configuration is Mercury OEM part number 46-812966A12. Exact fitment depends on the engine model, gearcase configuration, and serial-number range.
Catalog records identify this water-pump service kit on Mercury 4-stroke gear-housing applications including 30 HP EFI models with serial number 1C109093 and later, and multiple 40 HP and 50 HP 4-stroke configurations. Always compare your engine model and serial number with the compatibility information before ordering.
- Complete water-pump service components for the applicable outboard configuration.
- Includes a replacement impeller, pump housing, gaskets, wear-plate component, pump-base components, and related seals or hardware as listed below.
- Aftermarket replacement; not an OEM-branded Mercury component.
- Important: Do not use the 2-stroke reference 46-812966A11 to determine fitment. The documented 46-812966A12 service-kit application is for selected 4-stroke models.
Part Number References
Use these references when comparing the original water-pump service kit or parts catalog.
| Brand or Source | Reference | Description |
|---|---|---|
| Mercury | 46-812966A12 | Water pump service kit reference for selected 4-stroke applications |
| Mercury | 47-19453T | Water pump impeller component |
| Mercury | 14334A3 | Water pump housing component |
| Mercury | 46-812966A7 | Pump-base component |
| Mercury | 27-822189 | Water-pump gasket component |
| Mercury | 27-19701 | Water-pump gasket component |
Engine and Model Compatibility
The following catalog relationships are useful fitment leads. Horsepower, stroke, model description, and serial-number conditions must be considered together.
| Brand | Model | HP | Stroke | Serial condition | Part reference |
|---|---|---|---|---|---|
| Mercury | 30 EFI, 3-cylinder | 30 | 4-Stroke | 1C109093 and later | 46-812966A12 |
| Mercury | 40 carbureted, 3-cylinder | 40 | 4-Stroke | 1B227000–1B344306 | 46-812966A12 |
| Mercury | 40 carbureted, 3-cylinder | 40 | 4-Stroke | 1C000001–1C018825 | 46-812966A12 |
| Mercury | 40 carbureted, 3-cylinder | 40 | 4-Stroke | 1C018826 and later | 46-812966A12 |
| Mercury | 40 EFI, 3-cylinder | 40 | 4-Stroke | 1B227000–1B344398 | 46-812966A12 |
| Mercury | 40 EFI, 3-cylinder | 40 | 4-Stroke | 1C000001–1C043416 | 46-812966A12 |
| Mercury | 40 EFI, 4-cylinder | 40 | 4-Stroke | 0P401000–0P515896 | 46-812966A12 |
| Mercury | 40 EFI, 4-cylinder | 40 | 4-Stroke | 0T409000–1B344306 | 46-812966A12 |
| Mercury | 40 EFI, 4-cylinder | 40 | 4-Stroke | 1C000001–1C050251 | 46-812966A12 |
| Mercury | 40 EFI, 4-cylinder | 40 | 4-Stroke | 1C050252 and later | 46-812966A12 |
| Mercury | 50 EFI, 4-cylinder | 50 | 4-Stroke | 0T409000–1B344306 | 46-812966A12 |
| Mercury | 50 EFI, 4-cylinder | 50 | 4-Stroke | 1C000001–1C050251 | 46-812966A12 |
| Mercury | 50 EFI, 4-cylinder | 50 | 4-Stroke | 1C050252 and later | 46-812966A12 |
| Mercury, Mariner, Force | Selected equivalent outboard applications | 30–60 | 4-Stroke | Verify the exact model and serial number | 46-812966A12 |
Technical Specifications
- Product type
- Water pump repair/service kit
- Application
- Selected Mercury, Mariner, and Force 30–60 HP 4-stroke outboards
- Primary OEM reference
- 46-812966A12
- Impeller reference
- 47-19453T
- Housing reference
- 14334A3
- Pump-base reference
- 46-812966A7
- Replacement type
- Aftermarket service replacement
What’s in the Box
This kit is supplied as a water-pump service assembly. Component references associated with the applicable service-kit configuration include:
- Water pump impeller — 47-19453T
- Pump housing — 14334A3
- Pump-base component — 46-812966A7
- Water-pump gaskets — 27-822189 and 27-19701
- Tube seal for applicable 4-stroke configurations — 859770-1
- Plastic washer component — 12-858234
- Additional seals and hardware required by the applicable gearcase configuration
Component appearance and included minor hardware may vary by production batch and application. Compare the supplied parts with the original assembly before installation.
Installation Notes
- Disconnect the battery and follow the outboard manufacturer’s service procedure.
- Place the engine in neutral and remove the lower unit according to the service manual.
- Remove the old water-pump housing, impeller, gaskets, wear plate, seals, and related components.
- Clean all mating surfaces and inspect the driveshaft, keyway, water tube, and pump base for wear or damage.
- Install the replacement gasket, wear plate, impeller key, and impeller in the correct order.
- Install the pump housing and seals, ensuring that the impeller blades are oriented correctly as the housing is fitted.
- Reinstall the lower unit, confirming proper alignment of the driveshaft, shift shaft, and water tube.
- Run the engine only in an appropriate water supply or service tank and verify a steady cooling-water tell-tale stream.
Professional installation is recommended. Use the service manual for your exact engine model and serial-number range.
Troubleshooting and FAQ
How do I confirm fitment?
Check the engine brand, horsepower, stroke, model description, gearcase configuration, and complete serial number. This listing is intended for selected 30–60 HP 4-stroke applications using the 46-812966A12 water-pump service-kit reference. A horsepower match by itself does not confirm fitment.
Is 46-812966A11 the same application?
No. Catalog information distinguishes 46-812966A12 as a 4-stroke water-pump service-kit reference and 46-812966A11 as a 2-stroke service-kit reference. Do not substitute one based only on a similar horsepower rating.
What are common signs of a worn impeller?
Typical symptoms include a weak or missing tell-tale stream, overheating at idle or low speed, and reduced cooling-water flow. Stop the engine if overheating occurs and inspect the complete water-pump system.
How often should the impeller be serviced?
Follow the maintenance schedule for your exact engine. Inspect the impeller during routine service and replace it when damaged, hardened, deformed, or when cooling-water flow is inadequate.
Is this an OEM part?
No. This is an aftermarket replacement kit intended to service applications that reference Mercury OEM part number 46-812966A12.
Safety and Important Information
- Verify the complete engine model and serial number before ordering.
- Do not rely on horsepower alone; different gearcase and stroke configurations may use different water-pump parts.
- Inspect the water-pump cavity, wear plate, pump base, key, seals, and water tube during installation.
- Never operate the outboard without an adequate cooling-water supply.
- This is an aftermarket replacement, not an OEM-branded Mercury component.
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