Water Pump Repair Kit for Mercury/Mariner 30–60 HP 4-Stroke Outboards — Replaces 46-812966A12
Water Pump Repair Kit for Mercury/Mariner 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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Delivery and Shipping
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Water Pump Repair Kit for Mercury/Mariner 30–60 HP 4-Stroke Outboar...
Water Pump Repair Kit for Mercury/Mariner 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 intended for servicing the cooling-system water pump on selected Mercury and Mariner 30–60 HP 4-stroke outboards. The supplied compatibility information includes EFI, JET, SeaPro, BIGFOOT and Formula variants, along with selected Force 70 HP and 75 HP applications. Confirm the exact engine model, year, serial-number range, gearcase configuration and original pump components before ordering.
The kit is listed as a replacement for Mercury/Mariner references 46-812966A12, 812966A11, 812966A4, 812966A5, 14334A1, 14334A2 and 14334A3. Additional aftermarket reference information includes Sierra 18-3324 and Quicksilver 812966A12. These numbers should be compared with the part removed from your engine; number co-occurrence alone does not confirm fitment for every model or serial range.
- Aftermarket replacement water-pump repair kit for selected outboard applications.
- Includes the impeller, pump housing, plates, base, gaskets and related installation hardware listed below.
- Intended for specific applications using a 1.83:1 ratio gearcase.
- Verify the original parts and exact engine configuration before installation.
Part Number References
| Brand | Part Number | Reference Description |
|---|---|---|
| Mercury/Mariner | 46-812966A12 | Primary replacement reference |
| Mercury/Mariner | 812966A11 | Listed superseded reference |
| Mercury/Mariner | 812966A4 | Listed superseded reference |
| Mercury/Mariner | 812966A5 | Listed superseded reference |
| Mercury/Mariner | 14334A1 | Listed replacement reference |
| Mercury/Mariner | 14334A2 | Listed replacement reference |
| Mercury/Mariner | 14334A3 | Housing reference |
| Quicksilver | 812966A12 | Listed equivalent reference |
| Sierra | 18-3324 | Listed aftermarket reference |
Engine and Model Compatibility
The following applications are listed for this repair kit. Always verify the complete model designation, production year, serial-number range, stroke configuration and gearcase ratio against your engine before purchase.
| Brand | Model | Rated HP | Stroke | Listed Years | Reference | Notes |
|---|---|---|---|---|---|---|
| Mercury | 30 EFI | 30 | 4-Stroke | 2006–2012+ | 46-812966A12 | |
| Mercury | 35 EFI JET | 35 | 4-Stroke | 2006–2012+ | 46-812966A12 | |
| Mercury | 40, 4-cylinder | 40 | 4-Stroke | 2001–2012+ | 46-812966A12 | Standard and EFI versions listed |
| Mercury | 40 EFI, 3-cylinder | 40 | 4-Stroke | 2006–2012+ | 46-812966A12 | |
| Mercury | 40 CARB | 40 | 4-Stroke | 2006–2012+ | 46-812966A12 | |
| Mercury | 40 JET | 40–60 | 4-Stroke | 1999–2012+ | 46-812966A12 | Jet-drive variants listed |
| Mercury | 40 SeaPro | 40 | 4-Stroke | 2006–2012+ | 46-812966A12 | Commercial model listed |
| Mercury | 45 JET | 45–60 | 4-Stroke | 1998–2004 | 46-812966A12 | |
| Mercury | 50, 4-cylinder | 50 | 4-Stroke | 2001–2012+ | 46-812966A12 | Standard and EFI versions listed |
| Mercury | 55, 3-cylinder | 55 | 4-Stroke | 1999–2006 | 46-812966A12 | |
| Mercury | 60, 3- and 4-cylinder | 60 | 4-Stroke | 1999–2012+ | 46-812966A12 | Standard, EFI and BIGFOOT versions listed |
| Mercury | 60 SeaPro | 60 | 4-Stroke | 2006–2012+ | 46-812966A12 | Commercial model listed |
| Mercury | Formula 60 | 60 | 4-Stroke | 2006–2012+ | 46-812966A12 | |
| Force | 70 HP | 70 | 4-Stroke | 1991–1995 | 46-812966A12 | Listed application; verify engine identification carefully |
| Force | 75 HP | 75 | 4-Stroke | 1996–1998 | 46-812966A12 | Listed application; verify engine identification carefully |
Technical Specifications
- Product Type
- Aftermarket water pump repair kit
- Installation
- Replacement water-pump assembly components
- Approximate Weight
- 0.63 kg (1.39 lb)
- Gearcase Application
- Selected 1.83:1 ratio gearcases
- Manufacturer Status
- Aftermarket replacement; not a Mercury, Mariner, Quicksilver or Sierra original-manufacturer product
What’s Included
- 1 × Impeller, reference 47-19453T
- 1 × Faceplate, reference 19700A2
- 1 × Base, reference 46-812966A7
- 1 × Housing, reference 14334A3
- 1 × Guide tube/coupler, references 859770, 8597701 or 893857
- 1 × Upper gasket, reference 27-822189
- 1 × Lower gasket, reference 27-19701
- 1 × Impeller key
- 1 × O-ring
- 11 × Small washers
Component references identify the listed kit contents and may cover more than one engine variation. Compare the removed parts and the applicable exploded parts diagram before installation.
Installation Notes
- Disconnect the battery and place the outboard in neutral.
- Remove the lower unit according to the engine manufacturer’s service procedure.
- Place the lower unit on a stable work surface and remove the water-pump housing fasteners.
- Lift off the old housing and note the order and orientation of all pump components.
- Remove the old impeller, gaskets, faceplate and related seals. Clean the mating surfaces thoroughly.
- Install the applicable lower gasket, faceplate and impeller key.
- Install the impeller on the driveshaft, orienting the vanes in the correct direction for shaft rotation. Do not force the impeller over the key.
- Install the upper gasket and housing over the impeller.
- Tighten the housing fasteners using the manufacturer’s specified torque.
- Reinstall the lower unit, making sure the water tube and shift shaft are correctly aligned.
- Torque the lower-unit mounting fasteners according to the applicable service manual.
- Test the engine in an appropriate water supply and confirm a steady tell-tale stream before normal operation.
Use the correct service manual for your exact engine. If you are not familiar with lower-unit removal or water-pump service, professional installation is recommended.
Troubleshooting and FAQ
What are common signs of a failing water pump?
Common symptoms include a weak or missing tell-tale stream, an overheating alarm, steam from the exhaust or an engine that runs hotter than normal. Stop operation if overheating occurs and diagnose the cooling system before continuing.
How often should the impeller be inspected?
Inspect the impeller at the interval specified by the engine manufacturer and whenever the engine shows cooling-system symptoms. Replacement frequency depends on operating hours, storage conditions and exposure to sand, silt or saltwater.
Will this kit fit a BIGFOOT or SeaPro model?
The supplied application information lists selected Mercury 60 HP BIGFOOT and Mercury 40/60 HP SeaPro models. Confirm the exact model, year, serial-number range, gearcase ratio and original part numbers before ordering.
What should I do if the engine still overheats after installation?
Stop the engine and check the impeller-key installation, impeller orientation, gasket placement, housing condition, water-tube alignment and cooling passages. Also verify that the replacement components match the exact water-pump assembly for your engine.
Why might some washers or seals remain after installation?
The listed kit covers multiple engine variations. Some components may not be used on every application. Use the parts diagram for your exact engine rather than installing unused parts by guesswork.
Is this an OEM product?
No. This is an aftermarket replacement kit. The displayed Mercury, Mariner, Quicksilver and Sierra numbers are reference numbers used for application comparison and are not a statement that this kit is manufactured by those brands.
What are the warranty and return terms?
Warranty and return eligibility are governed by the seller’s current store policy and the order terms applicable at checkout. Contact support before returning or installing a part if the supplied components do not match your application.
Safety and Important Information
- Confirm the exact engine brand, model, year, serial-number range, stroke type, gearcase ratio and original part numbers before ordering.
- Compare the kit components with the original water-pump assembly and the applicable service-manual diagram.
- Never operate an outboard with an uncertain cooling-water supply or an overheating warning.
- This is an aftermarket replacement product, not an OEM component.
- Professional installation is recommended when lower-unit service experience or the correct torque specifications are unavailable.
About Sea Sierra
- Marine Parts Focus — We provide replacement marine components for maintenance and repair applications.
- Application Guidance — Product references and compatibility information are supplied to help customers compare parts before ordering.
- Support — Contact support with your engine model, year, serial number and original part information when application confirmation is needed.
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